Instruction Manual - Xylem Analytics Library/Resource... · Sensocheck limited to the glass electrode only 54 21 Temperature probe Combination electrode shield Fit jumper between

Instruction ManualStratos 2201 (X) pHStratos 2211 (X) pH withHART� Communication

Software Version: 3.xTA-194.100-KNE03 150101

Elektronische MeßgeräteGmbH & Co.Beuckestr. 22, D–14163 BerlinPostfach 37 04 15, D–14134 BerlinPhone: +49-30-801 91-0Fax: +49-30-801 91-200Internet: http://www.knick.deE-mail: [email protected]

WarrantyDefects occurring within 3 years from delivery date shallbe remedied free of charge at our plant (carriage andinsurance paid by sender).Accessories: 1 year

Note

Changes 3

Changes for software release 3

Temperature probe adjustment

The Stratos can be adjusted to a connected temperature probe. This is particularly useful for Pt 100 temperature probes.(See Pg. 32)

This function should only be used by experts. Incorrectly set parameters may go unnoticed,but change the measuring properties.

Changes 4

Warning

Warning

Information 5

Safety Precautions

Be sure to read and observe the following requirements!

Never use the Stratos 2201/2211 pH for measurement in areas that are subject to an explo-sion hazard during operation.Be sure that the supply voltage does not exceed 30 Vdc.

Stratos 2201/2211 X pH is approved for operation in hazardous locations. Before connecting the Transmitter to a power supply unit, make sure that this is an associ-ated apparatus.

Whenever it is likely that the protection has been impaired, the instrument shall be made inoperative andsecured against unintended operation. The protection is likely to be impaired if, for example:

❏ the instrument shows visible damage

❏ the instrument fails to perform the intended measurements

❏ after prolonged storage at temperatures above 70 �C

❏ after severe transport stresses

Before recommissioning the instrument, a professional routine test in accordance with EN 61010-1 must beperformed. This test should be carried out at our factory.

The instrument shall not be used in a manner not specified by this manual.

cal

Note

Warning

conf

cal

Information 6

Information on this Instruction Manual

ITALICS are used for texts which appear in the Stratos 2201/2211 (X) pH display.

�� is used to represent keys, e.g. ��.

Keys for which the functions are explained are frequently shown in theleft-hand column.

Notes provide important information that should be strictly followed when using the unit.

Warning means that the instructions given must always be followed for your own safety.Failure to follow these instructions may result in injuries.

Mode Codes

After pressing �� or �� you can enter one of the following codes to access the desig-nated mode:

��, 0000: Error info��, 1200: Configuration��, 5555: Current source

��, 0000: Cal info��, 1015: Temperature probe adjustment��, 1100: Calibration��, 2222: Test mode (electrode potential display)

Contents 7

Contents

Safety Precautions 5. . . . . . . . . . . . . . . . . . . . . .

Information on this Instruction Manual 6. . .

Mode Codes 6. . . . . . . . . . . . . . . . . . . . . . . . . . . .

1 Assembly 8. . . . . . . . . . . . . . . . . . . . . . . . . . .

Package Contents and Unpacking 8. . . .

Assembly 8. . . . . . . . . . . . . . . . . . . . . . . . . .

2 Installation, Connection and Commissioning 12. . . . . . . . . . . . . . . . .

Proper Use 12. . . . . . . . . . . . . . . . . . . . . . . .

Overview of the Stratos 12. . . . . . . . . . . . . .

Terminal Assignment 13. . . . . . . . . . . . . . . .

Installation and Commissioning 13. . . . . . .

Wiring Diagrams (pH) 14. . . . . . . . . . . . . . .

Wiring Diagrams (ORP) 19. . . . . . . . . . . . .

3 Operation 20. . . . . . . . . . . . . . . . . . . . . . . . . . .

User Interface 20. . . . . . . . . . . . . . . . . . . . . .

Display 21. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Keypad 21. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Safety Functions 22. . . . . . . . . . . . . . . . . . . .

Outputs 23. . . . . . . . . . . . . . . . . . . . . . . . . . .

Configuration 24. . . . . . . . . . . . . . . . . . . . . . .

Calibration 26. . . . . . . . . . . . . . . . . . . . . . . . .

Measurement 33. . . . . . . . . . . . . . . . . . . . . .

4 Diagnostics, Maintenance and Cleaning 34

Sensoface, Sensocheck 34. . . . . . . . . .

Error Messages 35. . . . . . . . . . . . . . . . . . . .

Calibration Error Messages 37. . . . . . . . . .

Diagnostics Functions 38. . . . . . . . . . . . . . .

Maintenance and Cleaning 39. . . . . . . . . . .

5 Annex 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Line 40. . . . . . . . . . . . . . . . . . . . . . .

Specifications 41. . . . . . . . . . . . . . . . . . . . . .

Certificate of Conformity 44. . . . . . . . . . . . .

Buffer Charts 47. . . . . . . . . . . . . . . . . . . . . . .

Technical Terms 49. . . . . . . . . . . . . . . . . . . . . . . . .

Index 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly 8

1 Assembly

Package Contents and Unpacking

Unpack the instrument carefully and check the ship-ment for transport damage and completeness.The package contains:

– Front unit of Stratos 2201/2211 (X) pH

– Lower case

– Short instruction sheet

– This instruction manual

– Bag containing:➀ 2 sealing plugs ➆ 1 hinge pin➁ 5 hexagon nuts ➇ 3 cable ties➂ 3 Pg cable glands ➈ 3 filler plugs➃ 1 rubber reducer ➉ 3 gaskets➄ 1 Pg plug 11 1 washer➅ 4 enclosure screws 12 1 jumper

Assembly

Fig. 1 Assembling the case

➀(For sealing in case of wall mounting)

➁

➂

➃

➄

➅

➆(Can be insertedfrom either side)

➇

➈

➉

11

For conduit mounting:Place washerbetween enclosureand nut.

11

12

Assembly 9

80 [3.15]32 [1.26]

72 [2

.83]

6.2

[0.2

4]ap

prox

. 14

84 [3.31]

42 [1.65] Pg 13.5 (3 pcs.)

144 [5.67]

144

[5.6

7]

21

43 [1.69]

105 [4.13]27

(not included in supply)

Control panel 1 – 22 mm

max. 25 78 [3.07] 27

Control panel cutout138 x 138 mm (DIN 43700)

Panel-mount kitconsisting of:

4 screws4 span pieces4 threaded sleeves1 seal

➀➁➂➃

➃

➀

➁➂

Holes forpost mounting

Holes forwall mounting

(4 x)

(2 x)

For Pg 13.5 threaded cable glands(use only plastic glands)

[0.5

5]

[1.06]

[0.83]

[0.98] [1.06]

[5.43 x 5.43]

[0.04 – 0.87]

Note: All dimensions in mm [inches]

Fig. 2 Dimension drawing for Stratos, mounting diagram and ZU 0275 panel-mount kit

Assembly 10

horizontal post/

40–60 mm dia.

➀

➁

➂

ZU 0276 protective hood(if required)

For vertical or

pipe mounting

Pipe-mount kitconsisting of:

4 self-tapping screws1 post mounting plate2 hose clamps with

➀➁

➂worm gear driveto DIN 3017

[1.57–2.36]

Fig. 3 ZU 0274 pipe-mount kit

165 [6.5]

173

[6.8

1]

132 [5.2]

Fig. 4 ZU 0276 protective hood for wall and pipe mounting

Assembly 11

280

[11.

03]

7 [0

.28]

➀ Recommended stripping lengths for multi-core cables

➁ Recommended stripping length for coaxial cable

➂ Pulling out the terminals using a screwdriver (also see ➆)

➃ Cable laying in the Stratos➄ Connecting lines for loop current ➅ Cover for electrode and temperature

probe terminals➆ Areas for placing the screwdriver to

pull out the terminals➇ Connection of handheld terminal

➀ ➁

➃

➄

Be sure not tonotch the cable

cores when strippingthe insulation!

Dimensions in mm [inches].

➄

➅

➆

➇

Coa

xial

cab

le

13 mm [0.5]

7 mm [0.28]

➂

Fig. 5 Installation information Stratos 2201/2211 (X) pH

Warning

Warning

Capabilities, Connection 12

2 Installation, Connection and Commissioning

Proper Use

Stratos 2201/2211 (X) pH is used for pH and temper-ature measurement in industry, the environment,food processing and waste-water field. It can beeither field-mounted or fixed into a control panel.

Never use the Stratos2201/2211 pH for measurement inareas that are subject to an explo-sion hazard during operation.

Stratos 2201/2211 X pH is ap-proved for operation in hazardouslocations.

Overview of the Stratos

pH / mVSensocheck

TemperaturePt 100/1000/NTC 30 k�

Stratos 2201/2211 (X) pH

mA

➀

➁

➂

➃

Fig. 6 System functions of Stratos 2201/2211 (X) pH

➀ Inputs for glass and reference electrode➁ Input for temperature probe➂ Current loop 4 – 20 mA,

transports power to and output signal from theStratos,

with Stratos 2211 (X) pH also for HART� commu-nication

� Equipotential bonding (only with Stratos2201/2211 X pH)

Warning

Warning

Warning

Warning

Warning

Warning


Terminal Assignment

+ 11 10

4 to

20

mA

+–

glas

s el

.

9 8 7 6 5 4 2 1

�

output input

shield

–

aux

el.

n.c.

HA

RT

observe grounding conditions

refe

renc

e el

.

Fig. 7 Terminal assignment of Stratos 2201/2211 (X) pH

Installation and CommissioningInstallation and commissioning ofthe Stratos may only be carried outin accordance with this instructionmanual and per applicable localand national codes. Be sure to ob-serve the technical specificationsand input ratings.

Before connecting the Stratos2201/2211 pH to a power supplyunit, make sure that this is not ca-pable of outputting more than30 Vdc.

Do not use alternating current ormains power supply!

Stratos 2201/2211 X pH may onlybe connected to an explosion-proofpower supply unit (for input ratingsrefer to annex of Certificate of Con-formity).

When commissioning, a completeconfiguration must be carried out.

For easier installation, the terminal strips are of aplug-in design. The terminals are suitable for singlewires and flexible leads up to 2.5 mm2 (AWG 14)(see Pg. 11).See Pg. 14 and following for connection examples.

Do not use cable clamp (shield) forreference electrode connectionwhen auxiliary electrode (solutionground) is in use.


Wiring Diagrams (pH)

refe

renc

e el

.

glas

s el

. +

��

shield

aux.

el.

8 7 4 2 1

5 4 2 1

5

Temperatureprobe

Combinationelectrode

Fit jumper betweenterminals 4 + 5.

Fig. 8a pH measurement with combination electrode and temperature probe, Sensocheck limited to the glass electrode only

5 4 2 1

�

Temperatureprobe


shield

Fit jumper betweenterminals 4 + 5.re

fere

nce

el.

glas

s el

. +

�

aux.

el.

8 7 4 2 15

Fig. 8b pH measurement with combination electrode and temperature probe, Sensocheck limited to the glass electrode only



shield

5 4 2 1

Specify temperature!

Fit jumper betweenterminals 4 + 5.re

fere

nce

el.

glas

s el

. +

�

aux.

el.

8 7 4 2 15

Fig. 9 pH measurement with combination electrode without temperature probe, Sensocheck limited to the glass electrode only


5 4 2 1�

shieldre

fere

nce

el.

glas

s el

. +

�

aux.

el.

8 5 4 2 17

Temperatureprobe

Glasselectrode

Referenceelectrode


Fig. 10 pH measurement with separate glass and reference electrode and temperature probe, Sensocheck limited to the glass electrode only

5 4 2 1

shield

refe

renc

e el

.

glas

s el

. +

�

aux.

el.

8 5 4 2 17

Glasselectrode

Referenceelectrode

Specify temperature!


Fig. 11 pH measurement with separate glass and reference electrode without temperature probe, Sensocheck limited to the glass electrode only


refe

renc

e el

.

glas

s el

. +

��

shield

aux.

el.

8 5 4 2 1

5 4 2 1

7

Temperatureprobe


Aux.electrode

Insulate!

Fig. 12 pH measurement with combination and aux. electrode and temperature probe, Sensocheck for glass and reference electrode

refe

renc

e el

.

glas

s el

. +

�

shield

aux.

el.

8 5 4 2 1

5 4 2 1

7


Aux.electrode

Specifytemperature!

Insulate!

Fig. 13 pH measurement with combination and aux. electrode without temperature probe, Sensocheck for glass and reference electrode


5 4 2 1�

shieldre

fere

nce

el.

glas

s el

. +

�

aux.

el.

8 5 4 2 17

Temperatureprobe

Glasselectrode

Referenceelectrode

Aux.electrode

Fig. 14 pH measurement with separate glass, reference and aux. electrode and temperature probe, Sensocheck for glass and reference electrode

5 4 2 1

shield

refe

renc

e el

.

glas

s el

. +

�

aux.

el.

8 5 4 2 17

Glasselectrode

Referenceelectrode

Aux.electrode

Specifytemperature!

Fig. 15 pH measurement with separate glass, reference and aux. electrode without temperature probe, Sensocheck for glass and reference electrode


Wiring Diagrams (ORP)

5 4 2 1

�

shield

refe

renc

e el

.

glas

s el

. +

�

aux.

el.

8 7 4 2 15

Insulate!

Temperatureprobe

combination ORP electrode

Fig. 16 ORP measurement with separate combination ORP electrode and temperature probe

5 4 2 1

shield

refe

renc

e el

.

glas

s el

. +

�

aux.

el.

8 7 4 2 15

Insulate!

combination ORP electrode

Specifytemperature!

Fig. 17 ORP measurement with combination ORP electrode without temperature probe

Operation 20

3 Operation

User Interface

meas cal conf

Stratos

cal conf � � enter

Alarm LED

Keypad

Instrument designation

Rating plate

Status fields:

- Measuring mode - Calibration mode - Alarm (Contact only

for Model 2401)-Wash contact active(only Model 2401 pH)- Configuration mode

Fig. 18 Front view of Stratos

cal

conf

�

�

enter

cal enter➔

enterconf ➔

� �+

Operation 21

Display

Mode codeentry

Interval/Response time

Hold stateactive

Continue withenter

Unit value symbols

Tempera-ture

Loopcurrent Alarm

setting

Senso-check Calibration

Manual tempspecification

Sensordata

Sensoface

Wait

Display/Measured variable

Bar for instrument status

Fig. 19 Stratos display

Keypad

Start, end calibration

Start, end configuration

Select digit position(selected position flashes)

Change digit

Prompt in display: continue in program sequence, Configuration: Confirm entries, nextconfiguration step, Measuring mode: Display outputcurrent

Cal info, display asymmetry poten-tial (zero) and slope (see Pg. 33)

Error info, display last output errormessage (see Pg. 33)

Start manual unit self-test GainCheck (see Pg. 22)

� �+

Operation 22

Safety Functions

Sensoface electrode monitoring

Sensoface provides informationon the electrode state. The asym-metry potential, slope and responsetime during calibration are eva-luated. Sensocheck continuouslymonitors the glass and referenceelectrode.

For more detailed information, see chapter “Diagnos-tic, Maintenance and Cleaning” (Pg. 34).

GainCheck manual self-test

Simultaneously pressing � and �starts the manual unit self-test.

A display test is carried out, the software version isdisplayed and the memory and measured valuetransmission are checked.

Automatic self-test

The automatic unit self-test checks the memory andthe measured-value transmission. It runs automati-cally in the background at fixed intervals.

Operation 23

Outputs

Loop current

The current loop transports power to and output sig-nals from the Stratos. The current is controlled bythe measured variable selected in the configuration.The current beginning and end can be set to anydesired value.To check connected peripherals (e.g. limit switches,controllers), the loop current can be manually speci-fied (see Pg. 38).

HART communication

Stratos 2211 (X) pH can be remote controlled viaHART communication. It can be configured using ahandheld terminal or from the control room. Mea-sured values, messages and unit identification canbe downloaded at any time. This allows easy integra-tion also in fully automatic process sequences.

For more detailed information, refer to HART Com-mand Specification.

Alarm

During an error message the alarm LED flashes.Alarm response time is permanently set to 10 s.

Error messages can also be signaled with a 22 mAsignal via the loop current (see Configuration, Pg. 25).

conf

Operation 24

Configuration

Here the basic settings of the unit are carried out.Symbols show which parameter is being configured.

Activate with ��change parameter with � and �, confirm/continue with � �, end configuration with ��

Mode code “1200”

During configuration the loop cur-rent is frozen.

When the configuration mode is exited, the unit re-mains in the Hold state for safety reasons. This pre-vents undesirable reactions of the connected periph-erals (e.g. limit switches, controllers) due to incorrectsettings. The measured value and Hold are dis-played alternately. Now you can check whether themeasured value is plausible and specifically end theHold state with � �. After 20 sec. (measuredvalue stabilization) the Hold state is ended.

Operation 25

Configuration parameters

Before attempting any changes refer to the parameter setup list shown below. This table presents the possible options and thefactory settings.

Picto-graph

Parameter Choices FactorySetting

Meas. variable (when changed,complete configuration required)

pH 0.00 to 14.00ORP –1,500 to 1,500 mV

pH

Temperature display / detection

°C / °F automatic detection

Auto °C

°C / °F manual specification°C/ °F automatic detection during measurementmanual specificationduring calibration

Temperature probe Pt 100 / Pt 1000 / NTC 30 k�

Pt 100

Current beginning,current end

4 mA, 0 to 14 pH,20 mA, 0 to 14 pH

4 mA, 0 pH20 mA, 14 pH

Hold state Last: Last current value Fix: Loop current specified

Last

22 mA signal for error message On / OFF OFF

Sensocheck

(sensor diagnostics)On / OFF OFF

Calibration mode:Automatic with Calimatic

BUF –00– Knick techn. buffersBUF –01– Mettler Toledo techn. buffersBUF –02– Merck/Riedel de HaënBUF –03– Ciba (94)BUF –04– Mettler Toledo (USA)BUF –05– NIST standard buffersBUF –06– HACHBUF –07– WTW

BUF –01–

Manual MAN Manual buffer entryDAT Data entry of premeasured values

Calibration timer interval 0,000 to 9,999 hours 0000 (OFF)

Note

cal

Note

cal

enter

Note

Operation 26

Calibration

You can conduct either a one or a two-point calibra-tion. The calibration can be carried out with the Cali-matic automatic buffer recognition, with manualbuffer input or by entering pre-measured electrodedata.

With manual temperature specifica-tion, the temperature of the buffersolutions must be entered in theconfiguration prior to calibration.

Activate with ��confirm/continue with � �, abort with �� ➜ � �

During calibration the loop currentis frozen. The instrument is in theHold state.

When the calibration mode is exited, the Stratos re-mains in the Hold state for safety reasons. This pre-vents undesirable reactions of the connected periph-erals (e.g. limit switches, controllers) due to incorrectsettings. The measured value and Hold are dis-played alternately. Now you can check whether themeasured value is plausible and specifically end theHold state with � � or repeat calibration with ��If you end the Hold state, the Stratos will return tomeasuring mode after 20 sec. (measured value sta-bilization).

Automatic calibration with Calimatic BUFand automatic calibration temp detection

The instrument can only operateproperly when the buffer solutionsused correspond to the configuredbuffer set. Other buffer solutions,even those with the same nominalvalues, may demonstrate a differenttemperature behavior. This leads tomeasurement errors.

Activate calibration by pressing the�� key.Using the � , � keys entermode code “1100” and then press � �.

Remove electrode and temperatureprobe and immerse them in the firstbuffer solution; it does not matterwhich buffer solution is taken first.

Start calibration with � �.

While the hour glass flashes, theelectrode and temperature proberemain in the first buffer solution.

The response time of the electrodeand the temperature probe is con-siderably reduced if the electrode isfirst moved about in the buffer solu-tion and then held still. Stirring pro-vides stable values faster.

Note

Note

cal

Operation 27

Buffer recognition

Nominal buffer value is displayed

Stability check:measured mV value is displayed

The stability check can be abortedwith ��. However, accuracy of thecalibration will be compromised.

Calibration with the first buffer iscompleted. Remove the electrodeand temperature probe from thefirst buffer solution and rinse offboth thoroughly.

❏ If you would like to carry out a one-point calibra-tion, end the calibration now with ��. The Stratosthen shows the newly determined asymmetry po-tential in the lower display and the old slope in themain display.

❏ If you would like to carry out a two-point calibra-tion, immerse the electrode and the temperatureprobe in the second buffer solution. Now start thecalibration again with � �. The calibration pro-cess runs again as for the first buffer.

At the end of calibration the slopeand asymmetry potential (based on25 °C) of the electrode are dis-played. Calibration is ended with � �. The Stratos remains in theHold state. You can now reinstallthe electrode and the temperatureprobe and end the Hold state with � �. After 20 sec. (measuredvalue stabilization) the Stratos re-turns to measuring mode.

Automatic calibration with Calimatic BUFand manual specification of calibration temp

The instrument can only operateproperly when the buffer solutionsused correspond to the configuredbuffer set. Other buffer solutions,even those with the same nominalvalues, may demonstrate a differenttemperature behavior. This leads tomeasurement errors.


Remove the electrode and immerseit in the first buffer solution; it doesnot matter which buffer solution istaken first. Enter the calibration temperatureusing the � and � keys.

enter

Note

Note

Operation 28

Start calibration with � �.

While the hour glass flashes, theelectrode remains in the first buffersolution.

The response time of the electrodeis considerably reduced if the elec-trode is first moved about in thebuffer solution and then held still.Stirring provides stable valuesfaster.

Buffer recognition

Nominal buffer value is displayed

Stability check:measured mV value is displayed

The stability check can be abortedwith ��. However, accuracy of thecalibration will be compromised.

Calibration with the first buffer iscompleted. Remove the electrodefrom the first buffer solution andrinse it off thoroughly.

❏ If you would like to carry out a one-point calibra-tion, end the calibration now with ��. The Stratosthen shows the newly determined asymmetry po-tential in the lower display and the old slope in themain display.

❏ If you would like to carry out a two-point calibra-tion, immerse the electrode in the second buffersolution. Now start the calibration again with �� . The calibration process runs again as for thefirst buffer.

At the end of calibration the slopeand asymmetry potential (based on25 °C) of the electrode are dis-played. Calibration is ended with � �. The Stratos remains in theHold state. You can now reinstallthe electrode and end the Holdstate with � �. After 20 sec.(measured value stabilization) theStratos returns to measuring mode.

cal

Note

Note

Operation 29

Manual calibration MANwith automatic calibration temp detection(if selected in Conf mode)

For calibration with manual buffer specification, youmust enter the pH value of the buffer solution used inthe instrument for the proper temperature.This enables calibration with any desired buffer solu-tion.


Remove electrode and temperatureprobe and immerse them in the firstbuffer solution; it does not matterwhich buffer solution is taken first.Confirm with � �.

Set the pH value of your buffersolution for the proper temperaturewith � and �. Start calibration with � �.

The response time of electrode andtemperature probe is considerablyreduced if the electrode is firstmoved about in the buffer solutionand then held still.

Stability check: measured mV valueis displayed.

The stability check can be abortedwith ��. However, the calibrationaccuracy will be compromised.

Calibration with the first buffer iscompleted. Remove the electrodeand temperature probe from thefirst buffer solution and rinse offboth thoroughly.

❏ If you would like to carry out a one-point calibra-tion, press �� to end the calibration now. TheStratos then shows the newly determined asym-metry potential (zero point) in the main displayand the old slope in the lower display.

❏ If you would like to carry out a two-point calibra-tion, immerse the electrode in the second buffersolution. Enter the pH value of the second buffersolution as has been done with the first buffer.Now start the calibration again with � �. Thecalibration process runs again as for the firstbuffer.

At the end of calibration the slopeand asymmetry potential (based on25 °C) of the electrode are dis-played. Press � � to end calibra-tion. The Stratos remains in theHold state. You can now reinstallthe electrode and temperatureprobe and end the Hold state with � �. After 20 sec (measuredvalue stabilization) the Stratos re-turns to measuring mode.

cal

Note

Note

Operation 30

Manual calibration MANwith manual specification of calibration temp(if selected in Conf mode)

For calibration with manual buffer specification, youmust enter the pH value of the buffer solution used inthe instrument for the proper temperature.This enables calibration with any desired buffer solu-tion.

Activate calibration by pressing the�� key.Using the � , � keys entermode code “1100”and then press � �.

Remove the electrode and immerseit in the first buffer solution; it doesnot matter which buffer solution istaken first. Enter the calibrationtemperature using the � and �keys and confirm with � �.

Set the pH value of your buffersolution for the proper temperaturewith � and �. Start calibration with � �.

The response time of electrode isconsiderably reduced if the elec-trode is first moved about in thebuffer solution and then held still.

Stability check: measured mV valueis displayed.

The stability check can be abortedwith ��. However, the calibrationaccuracy will be compromised.

Calibration with the first buffer iscompleted. Remove the electrodefrom the first buffer solution andrinse it off thoroughly.

❏ If you would like to carry out a one-point calibra-tion, press �� to end the calibration now. TheStratos then shows the newly determined asym-metry potential (zero point) in the main displayand the old slope in the lower display.

❏ If you would like to carry out a two-point calibra-tion, immerse the electrode in the second buffersolution. Enter the pH value of the second buffersolution as has been done with the first buffer.Now start the calibration again with � �. Thecalibration process runs again as for the firstbuffer.

At the end of calibration the slopeand asymmetry potential (based on25 °C) of the electrode are dis-played. Press � � to end calibra-tion. The Stratos remains in theHold state. You can now reinstallthe electrode and end the Holdstate with � �. After 20 sec.(measured value stabilization) theStratos returns to measuring mode.

cal

Operation 31

Data entry of premeasured electrodes DAT

You can directly enter the slope and asymmetry po-tential of an electrode. The values must be known,e.g. determined beforehand in the laboratory.

Activate calibration by pressing the�� key.Using the � , � keys entermode code “1100”and then press � �.

Enter asymmetry potential,confirm with � �

Enter slope,confirm with � �

At the end of calibration the slopeand asymmetry potential (based on25 °C) of the electrode are dis-played. Press � � to end calibra-tion. The unit remains in the Holdstate. You can now reinstall theelectrode and the temperatureprobe and end the Hold state with � �. After 20 sec. (measuredvalue stabilization) the unit returnsto measuring mode.

Convert slope [%] to slope [mV/pH] at 25 °C

% 78 80 82 84 86 88 90 92 94 96 98 100 102

mV/pH 46.2 47.4 48.5 49.7 50.9 52.1 53.3 54.5 55.6 56.8 58.0 59.2 60.4

Note

calenter

Operation 32

Adjustment of temperature probe

This function should only be usedby experts. Incorrectly set parame-ters may go unnoticed, but changethe measuring properties.Especially for Pt 100 temperatureprobe, it is advisable to perform anadjustment.


Measure the temperature of theprocess medium using an externalthermometer.

Using the � , � keys enter the de-termined temperature value in themain display. If you take over thetemperature value shown in thelower display, the correction is with-out effect.

Press � � to confirm the temper-ature value.

The Stratos remains in the Holdstate. You can end the Hold statewith � �. After 20 sec (measuredvalue stabilization) the Stratos re-turns to measuring mode.

Operation 33

Measurement

Measuring mode

In the measuring mode the main display shows theconfigured measured variable (pH or mV) and thesecondary display the temperature.

Cal info

With �� and mode code “0000” you can activate thecal info. Cal info shows the current calibration datafor approx. 20 sec. The 20 sec can be reduced bypressing � �. During cal info the unit is not in Holdstate.

Error info

With �� and mode code “0000” you can activatethe error info. Error info shows the most recent errormessage for approx. 20 sec. After that the messagewill be deleted. The 20 sec can be reduced by pres-sing � �. During error info the unit is not in Holdstate.

Manual temperature specification

The indicator signals that the temperature will bemanually specified. The measuring temperature canbe set in the configuration, the calibration tempera-ture in calibration.

Hold state

The unit will enter the Hold state under the followingconditions:

For calibration: Mode code 1015Mode code 1100Mode code 2222

configuration: Mode code 1200Mode code 5555

The loop current is frozen at Last or Fix (configura-tion Pg. 25). If the calibration or configuration modeis exited, the unit remains in the Hold state for safetyreasons. This prevents undesirable reactions of theconnected peripherals (e.g. limit switches, control-lers) due to incorrect settings. The measured valueand Hold are displayed alternately. Now you cancheck whether the measured value is plausible andspecifically end the Hold state with � �. After 20sec. (measured value stabilization) the unit returns tomeasuring mode.

Note

Note

Troubleshooting, Cleaning 34

4 Diagnostics, Maintenance and Cleaning

Sensoface, Sensocheck

Sensoface provides informationon the electrode state. The slope,asymmetry potential and responsetime during calibration are eva-luated. Sensocheck continuouslymonitors the glass and referenceelectrode. With Sensocheck

turned off no appears.

Three Smileys provide information on wear and re-quired maintenance. However, the unit can still de-termine the measured variable and output it via theloop current.

The worsening of a Sensoface cri-terion leads to the devaluation or of the Sensoface indicator.

An improvement of the Sensoface indicatorcan only take place after calibration or removal of anelectrode defect. is only displayed when Senso-check has been activated.

The condition for accurate informa-tion is proper calibration.

Sensoface displays during calibrationDisplay Problem Status

Electrode re-sponse time

The electrode adjusts slowly. You should consider replacing it. It may bepossible to achieve an improvement by cleaning or, in the case of anelectrode stored dry, by “watering”.The electrode adjusts very slowly to the measured value. Correct mea-surement is no longer ensured. The electrode should be replaced.

Asymmetrypotential and

Asymmetry potential (zero point) and slope of the electrode are stillokay, however the electrode should be replaced soon.

slope Asymmetry potential (zero point) and/or slope of the electrode havereached values which no longer ensure proper calibration. It is advisableto replace the electrode.

enterconf


Sensoface displays during measurementDisplay Problem Status

Calibration Over 80 % of the calibration interval has already past.timer The calibration interval has been exceeded.

Electrodedefect

Check the electrode and its connections (also see error messages 33and 34).

Error Messages

When one of the following error messages is output,the unit can no longer correctly determine the mea-sured variable or output it via the loop current.

During an error message the alarm LED flashes. Thealarm response time is permanently set to 10 sec.

During alarm condition the unit does not switch intoHold state. The current loop will remain active andstill represents the currently displayed reading. If22 mA function is configured (see page 25), errormessages will also be indicated with a 22 mA signal.

Error info

With �� and mode code “0000”you can activate the error info. Er-ror info shows the most recent errormessage for approx. 20 sec. Afterthat the message will be deleted.The 20 sec can be reduced bypressing � �. During error infothe unit is not in Hold state.

Errornumber

Display (flashing)

Problem Possible causes

Err 01 pH electrode - Electrode defective- Too little electrolyte in electrode- Electrode not connected- Break in electrode cable- Incorrect electrode connected- Measured pH value less than 0 or greater than +14

Err 02 Redox electrode - Electrode defective- Electrode not connected- Break in electrode cable- Measured electrode voltage less than –1500 mV or

greater than +1500 mV


Errornumber

Possible causesProblemDisplay (flashing)

Err 03 Temperature probe - Incorrect temperature probe connected or configured- Open or short circuit in temperature probe- Measured temperature less than –20 °C or greater than

+150 °C (NTC 30 k�: +130 °C)Err 21 Loop current - Measured value below configured current beginning

- Check configuration current beginning (see Pg. 25)

Err 22 Loop current - Measured value above configured current end- Check configuration current end (see Pg. 25)

Err 23 Loop current - Configured current span too large or too small(Difference between current beginning and end)

Err 33 Glass electrode - Glass electrode defective- Connection cable or electrode cap defective- Connection terminals or electrode cap dirty

Err 34 Reference elec-trode

- Reference electrode defective- Connection cable or electrode cap defective- Connection terminals or electrode cap dirty- Jumper between terminal 4 and 5 missing

(see Figs. 8a – 11 on Pg. 14 and the following)Err 98 System error - Configuration or calibration data defective; completely

reconfigure and recalibrate the unit- Measured value transmission defective- Memory error in unit program (PROM defective)

Err 99 Factory settings - EEPROM or RAM defective,- Error in factory settingsThis error message normally should not occur, as thedata are protected from loss by multiple safety functions.Should this error message nevertheless occur, there isno remedy. The unit must be repaired and recalibrated atthe factory.


Calibration Error Messages

(only during calibration)

Display Problem Possible causesAsymmetry poten-tial (zero) out ofrange ⟨±60 mV)

- Electrode “worn out”- Buffer solutions contaminated- Buffer does not belong to configured buffer set- Temperature probe not immersed in buffer solution (for automatic

temperature compensation)- Wrong buffer temperature set (for manual temperature specifica-

tion)- Electrode with nominal zero point < pH 6 or > pH 8 is used

Electrode slopeout of range

(80 – 103 %)

- Electrode “worn out”- Buffer solutions contaminated- Buffer does not belong to configured buffer set- Temperature probe not immersed in buffer solution (for automatic

temperature compensation)- Wrong buffer temperature set (for manual temperature specifica-

tion)- Electrode used has different nominal slope

Problems duringrecognition of thebuffer solution

- Same or similar buffer solution was used for both calibration steps- Buffer solution used does not belong to buffer set currently config-

ured in the unit- During manual calibration the buffer solutions were not used in the

specified order- Buffer solutions contaminated- Electrode defective- Electrode not connected- Electrode cable defective- Wrong buffer temperature set (for manual temperature specifica-

tion)Calibration wascanceled afterapprox. 2 minutes,because the elec-trode drift was toolarge.

- Electrode defective or dirty- No electrolyte in the electrode- Electrode cable insufficiently shielded or defective- Strong electric fields influence the measurement- Major temperature fluctuation of the buffer solution- No buffer solution or extremely diluted

Warning


Diagnostics Functions

Cal info

Pressing �� and entering mode code “0000” is go-ing to activate the cal info. Cal info shows the currentcalibration data for approx. 20 sec. During cal infothe unit is not in Hold state.

Error info

Pressing �� and entering mode code “0000” isgoing to activate the error info. Error info shows themost recent error message for approx. 20 sec. Afterthat the message will be deleted. The 20 sec can bereduced by pressing � �. During error infothe in-strument is not in Hold state.

Display electrode potential

During electrode maintenance it is useful to directlyindicate the electrode potential. This allows, for ex-ample, to check electrode response after cleaning.

Pressing �� and entering mode code “2222” willdisplay the electrode potential. The instrument is inHold state.

Display loop current

Pressing � � in measuring mode displays theloop current for a few seconds.

Current source

To check the connected peripherals (e.g. limitswitches, controllers), the loop current can be manu-ally specified.

In the current source function theloop current no longer follows themeasured value! It is manually spe-cified.Therefore, it must be ensured thatthe connected devices (controlroom, controllers, indicators) do notinterpret the current value as ameasured value!

Pressing �� and entering mode code “5555” youenter the current source mode. Specify the loop cur-rent using �, � and � �. The present loop cur-rent is shown in the lower display.Pressing �� exits the current source mode again.

GainCheck manual unit self-test

To start press � and � simultaneously.

A display test is carried out, the software version isdisplayed and the memory and measured-valuetransmission checked.

Automatic unit self-test

The automatic unit self-test checks the memory andthe measured-value transmission. It runs automati-cally in the background at fixed intervals.


Maintenance and Cleaning

Maintenance

The Stratos 2201/2211 (X) pH contains no user re-pairable components. If problems persist even afterreviewing section 4, please contact the factory.

Cleaning

To remove dust, dirt and spots, the external surfacesof the unit may be wiped with a damp, lint-free cloth.A mild household cleaner may also be used if neces-sary.

Specifications 40

5 Annex

Product Line

Units

Ref. No.Stratos 2201 pH 2201 pH

Stratos 2201 X pH for applicationin hazardous areas

2201 X pH

Stratos 2211 pHwith HART communication

2211 pH

Stratos 2211 X pH with HART communication, forapplication in hazardous areas

2211 X pH

Mounting Accessories

Ref. No.Pipe-mount kit ZU 0274

Panel-mount kit ZU 0275

Protective hood ZU 0276

Further Accessories

Ref. No.HART test socket, integrated inPg cable gland (for Stratos 2211 (X) pH only)

ZU 0287

SMEK input socket(for sensor cable with one coaxline)

ZU 0322

Suggested Power Supplies

Ref. No.Power supply / isolator for 24 Vac/dc

WG 20 A2

Repeater power supply for90 - 253 Vac

WG 21 A7

for 24 Vac/dc WG 21 A7Opt. 336

with HART communication

WG 21 A7Opt. 470

Loop-powered supply withHART communication

WG 25 A7

Specifications 41

Specifications

Stratos 2201 pH / 2211 pH

pH/mV input

Ranges pH value 0.00 to +14.00mV value –1500 to +1500 mV

Glass input resistance > 0.5*1012 �input current (20 �C)1) < 2*10–12 A

Reference input resistance > 1*1010 �input current (20 �C)1) < 1*10–10 A

Meas. Error(+ 1 count)

pH value < 0.02mV < 1 mV

Electrodemonitoring

Sensocheck: Monitoring of glassand reference electrode (can be switched off)

AlarmLimits

Determination during calibration

Electrode Standardiza-tion*)

– Calimatic automatic calibration with the buffer sets: -00- Knick technical buffers-01- (correspond to Mettler

Toledo techn. buffers)2.00/4.01/7.00/9.21

-02- Merck/Riedel de Haën2.00/4.00/7.00/9.00/12.00

-03- Ciba (94)2.06/4.00/7.00/10.00

-04- Mettler Toledo (USA)4.00/7.00/10.01

-05- Standard buffers NIST4.006/6.865/9.180

-06- HACH4.00/7.00/10.18

-07- WTW techn. buffers2.00/4.01/7.00/10.00

Stratos 2201 X pH / 2211 X pH

pH/mV input EEx ia IIC

Ranges pH value 0.00 to +14.00mV value –1500 to +1500 mV

Glass input resistance > 0.5*1012 �input current (20 �C)1) < 2*10–12 A

Reference input resistance > 1*1010 �input current (20 �C)1) < 1*10–10 A

Meas. Error(+ 1 count)

pH value < 0.02mV < 1 mV

Electrodemonitoring

Sensocheck: Monitoring of glassand reference electrode (can be switched off)

AlarmLimits

Determination during calibration

Electrode Standardiza-tion*)

– Calimatic automatic calibration with the buffer sets: -00- Knick technical buffers-01- (correspond to Mettler

Toledo techn. buffers)2.00/4.01/7.00/9.21

-02- Merck/Riedel de Haën2.00/4.00/7.00/9.00/12.00

-03- Ciba (94)2.06/4.00/7.00/10.00

-04- Mettler Toledo (USA)4.00/7.00/10.01

-05- Standard buffers NIST4.006/6.865/9.180

-06- HACH4.00/7.00/10.18

-07- WTW techn. buffers2.00/4.01/7.00/10.00

Specifications 42


– Manual entry of individual buffer values (MAN)

– Data entry for pre-measured electrodes (DAT)

– Temperature probe adjustment

CalibrationTimer

0 to 9999 h

CalibrationRanges

asymmetry potential � 60 mVslope 80 to 103 %For values outside this range, displaymessage (Sensoface)

Temp Input Pt 100 / Pt 1000 / NTC 30 k�

Ranges NTC –20.0 to +130.0 �C –4 to +266 °F

Pt –20.0 to +150.0 °C –4 to 302 °F

Meas. Error < 0.5 K2) � 1 count

Temp Com-pensation

automatic with Pt 100 / Pt 1000 /NTC 30 k� or manual

Display LC display, alarm LED

Loop Current

4 to 20 mA, floating22 mA for error message*)

supply voltage 12 to 30 V

Current Error < 0.3 % of current value � 50 �A

CurrentSource

3.80 mA to 22.00 mA

Start/End ofScale*)

as desired within pH or mV ranges

Spans*) pH value 2.00 to 14.00mV value 200 to 3000 mV


– Manual entry of individual buffer values (MAN)

– Data entry for pre-measured electrodes (DAT)

– Temperature probe adjustment

CalibrationTimer

0 to 9999 h

CalibrationRanges

asymmetry potential � 60 mVslope 80 to 103 %For values outside this range, displaymessage (Sensoface)

Temp Input Pt 100 / Pt 1000 / NTC 30 k� EEx ia IIC

Ranges NTC –20.0 to +130.0 �C –4 to +266 °F

Pt –20.0 to +150.0 °C –4 to 302 °F

Meas. Error < 0.5 K2) � 1 count

Temp Com-pensation

automatic with Pt 100 / Pt 1000 /NTC 30 k� or manual

Display LC display, alarm LED

Loop Current EEx ib IIC

4 to 20 mA, floating22 mA for error message*)

supply voltage 12 to 30 VImax = 100 mA, Pmax = 0.8 W

Current Error < 0.3 % of current value � 50 �A

CurrentSource

3.80 mA to 22.00 mA

Start/End ofScale*)

as desired within pH or mV ranges

Spans*) pH value 2.00 to 14.00mV value 200 to 3000 mV

Specifications 43


HART Com-munication(Model 2211only)

digital communication via FSK modu-lation of loop current, point-to-point connection, reading of device identification, mea-sured values, status and messagesreading and writing of parameters

ExplosionProtection

–

Data Retention

> 10 years (EEPROM)

EMC Emitted interference:EN 61 326 Class BImmunity to interference:EN 61 326, EN 61 326/A1

Temperature Operating/environmental temp–20 to +55 �CTransport and storage temp–20 to +70 �C

Enclosure Material: thermoplastic polyester, re-inforced (polybutylene terephthalate)Protection: IP 65Color: bluish gray RAL 7031

Cable Glands 3 Pg 13.5 threaded cable glands(not mounted), up to 5 Pg threaded cable glandspossible (only use plastic glands)

Dimensions See Dimension drawings, Pg. 9 ff

Weight approx. 1 kg

*) user defined 1) doubles every 10 K2) Pt 100: 1K


HART Com-munication(Model 2211Xonly)

digital communication via FSK modu-lation of loop current, point-to-point connection, reading of device identification, mea-sured values, status and messagesreading and writing of parameters

ExplosionProtection

II 2 G EEx ib [ia] IIC T6CE 0032 TÜV 99 ATEX 1446

Data Retention

> 10 years (EEPROM)

EMC Emitted interference:EN 61 326 Class BImmunity to interference:EN 61 326, EN 61 326/A1

Temperature Operating/environmental temp–20 to +55 �CTransport and storage temp–20 to +70 �C

Enclosure Material: thermoplastic polyester, re-inforced (polybutylene terephthalate)Protection: IP 65Color: bluish gray RAL 7031

Cable Glands 3 Pg 13.5 threaded cable glands(not mounted), up to 5 Pg threaded cable glandspossible (only use plastic glands)

Dimensions See Dimension drawings, Pg. 9 ff

Weight approx. 1 kg

*) user defined 1) doubles every 10 K2) Pt 100: 1K

Specifications 44

EC-Type-Examination Certificate

Specifications 45

Specifications 46

Specifications 47

Declaration of conformity

Buffer Charts 48

Buffer Charts-00- Knick technical buffers -01- (correspond to Mettler-Toledo technical buffers)°C pH

0 2.03 4.01 7.12 9.525 2.02 4.01 7.09 9.45

10 2.01 4.00 7.06 9.3815 2.00 4.00 7.04 9.3220 2.00 4.00 7.02 9.2625 2.00 4.01 7.00 9.2130 1.99 4.01 6.99 9.1635 1.99 4.02 6.98 9.1140 1.98 4.03 6.97 9.0645 1.98 4.04 6.97 9.0350 1.98 4.06 6.97 8.9955 1.98 4.08 6.98 8.9660 1.98 4.10 6.98 8.9365 1.99 4.13 6.99 8.9070 1.99 4.16 7.00 8.8875 2.00 4.19 7.02 8.8580 2.00 4.22 7.04 8.8385 2.00 4.26 7.06 8.8190 2.00 4.30 7.09 8.7995 2.00 4.35 7.12 8.77

-02- Merck-Titrisols, Riedel Fixanals°C pH

0 2.01 4.05 7.13 9.24 12.585 2.01 4.04 7.07 9.16 12.41

10 2.01 4.02 7.05 9.11 12.2615 2.00 4.01 7.02 9.05 12.1020 2.00 4.00 7.00 9.00 12.0025 2.00 4.01 6.98 8.95 11.8830 2.00 4.01 6.98 8.91 11.7235 2.00 4.01 6.96 8.88 11.6740 2.00 4.01 6.95 8.85 11.5445 2.00 4.01 6.95 8.82 11.4450 2.00 4.00 6.95 8.79 11.3355 2.00 4.00 6.95 8.76 11.1960 2.00 4.00 6.96 8.73 11.0465 2.00 4.00 6.96 8.72 10.9770 2.01 4.00 6.96 8.70 10.9075 2.01 4.00 6.96 8.68 10.8080 2.01 4.00 6.97 8.66 10.7085 2.01 4.00 6.98 8.65 10.5990 2.01 4.00 7.00 8.64 10.4895 2.01 4.00 7.02 8.64 10.37

-03- Ciba (94) buffersNominal values: 2.06, 4.00, 7.00, 10.00°C pH

0 2.04 4.00 7.10 10.305 2.09 4.02 7.08 10.21

10 2.07 4.00 7.05 10.1415 2.08 4.00 7.02 10.0620 2.09 4.01 6.98 9.9925 2.08 4.02 6.98 9.9530 2.06 4.00 6.96 9.8935 2.06 4.01 6.95 9.8540 2.07 4.02 6.94 9.8145 2.06 4.03 6.93 9.7750 2.06 4.04 6.93 9.7355 2.05 4.05 6.91 9.6860 2.08 4.10 6.93 9.6665 2.07* 4.10* 6.92* 9.61*70 2.07 4.11 6.92 9.5775 2.04* 4.13* 6.92* 9.54*80 2.02 4.15 6.93 9.5285 2.03* 4.17* 6.95* 9.47*90 2.04 4.20 6.97 9.4395 2.05* 4.22* 6.99* 9.38*

* extrapolated

-04- Mettler Toledo (USA)°C pH

0 4.00 7.12 10.325 4.00 7.09 10.25

10 4.00 7.06 10.1815 4.00 7.04 10.1220 4.00 7.02 10.0625 4.00 7.00 10.0130 4.01 6.99 9.9735 4.02 6.98 9.9340 4.03 6.98 9.8945 4.04 6.97 9.8650 4.06 6.97 9.8355 4.06* 6.97* 9.83*

60 4.06* 6.97* 9.83*

65 4.06* 6.97* 9.83*

70 4.06* 6.97* 9.83*

75 4.06* 6.97* 9.83*

80 4.06* 6.97* 9.83*

85 4.06* 6.97* 9.83*

90 4.06* 6.97* 9.83*

95 4.06* 6.97* 9.83*

* extrapolated

Buffer Charts 49

-05- NIST standard-buffers°C pH

0 4.010 6.984 9.4645 4.004 6.951 9.395

10 4.000 6.923 9.33215 3.999 6.900 9.27620 4.001 6.881 9.22525 4.006 6.865 9.18030 4.012 6.853 9.13935 4.021 6.844 9.10240 4.031 6.838 9.06845 4.043 6.834 9.03850 4.057 6.833 9.01155 4.071 6.834 8.98560 4.087 6.836 8.96265 4.109 6.841 8.94270 4.126 6.845 8.92175 4.145 6.852 8.90380 4.164 6.859 8.88585 4.185 6.868 8.86890 4.205 6.877 8.85095 4.227 6.886 8.833

-06- HACH buffersNominal values: 4.00, 7.00, 10.18°C pH

0 4.00 7.14 10.305 4.00 7.10 10.23

10 4.00 7.04 10.1115 4.00 7.04 10.1120 4.00 7.02 10.0525 4.01 7.00 10.0030 4.01 6.99 9.9635 4.02 6.98 9.9240 4.03 6.98 9.8845 4.05 6.98 9.8550 4.06 6.98 9.8255 4.07 6.98 9.7960 4.09 6.99 9.7665 4.09*) 6.99*) 9.76*)

70 4.09*) 6.99*) 9.76*)

75 4.09*) 6.99*) 9.76*)

80 4.09*) 6.99*) 9.76*)

85 4.09*) 6.99*) 9.76*)

90 4.09*) 6.99*) 9.76*)

95 4.09*) 6.99*) 9.76*)

* values complemented

Buffer values up to 60 °C as specified by Bergmann & Beving ProcessAB.

-07- WTW technical buffers

°C ST 1 ST 2 ST 3 ST 5

0 2.03 4.01 7.12 10.655 2.02 4.01 7.09 10.52

10 2.01 4.00 7.06 10.3915 2.00 4.00 7.04 10.2620 2.00 4.00 7.02 10.1325 2.00 4.01 7.00 10.0030 1.99 4.01 6.99 9.8735 1.99 4.02 6.98 9.7440 1.98 4.03 6.97 9.6145 1.98 4.04 6.97 9.4850 1.98 4.06 6.97 9.3555 1.98 4.08 6.9860 1.98 4.10 6.9865 1.99 4.13 6.9970 2.00 4.16 7.0075 2.00 4.19 7.0280 2.00 4.22 7.0485 2.00 4.26 7.0690 2.00 4.30 7.0995 2.00 4.35 7.12

Asymmetrypotential(zero point)

Buffer set

Buffer solution

cal

Calibration

Calibrationbuffer set

Calimatic


conf

Electrodeslope

Electrode zeropoint

GainCheck

HART

Technical Terms 50

Technical Terms

The voltage which a pH electrodegives off at a pH of 7. The asymme-try potential is different for everyelectrode and changes with ageand wear.

Contains selected buffer solutionswhich can be used for automaticcalibration with the Knick Cali-matic. The buffer set must be se-lected prior to calibration.

Solution with an exactly defined pHvalue for calibrating a pH meter.

Key for activating and ending cal-ibration.

Adjustment of the pH meter to thecurrent electrode characteristics.The asymmetry potential (zeropoint) and slope are adjusted. Ei-ther a one-or two-point calibrationcan be carried out. With one-pointcalibration only the asymmetry po-tential is adjusted.

See Buffer set.

Automatic buffer recognition. Be-fore the first calibration, the bufferset used must be activated once.

The patented Calimatic then auto-matically recognizes the buffer solu-tion used during calibration.

Combination of glass and referenceelectrode in one body.

Key for starting and ending configu-ration.

Is indicated in % of the theoreticalslope (59.2 mV/pH at 25 °C). Theelectrode slope is different for everyelectrode and changes with ageand wear.

See Asymmetry potential.

Unit self-test which runs automati-cally in the background at fixed in-tervals. The memory and mea-sured-value transmission arechecked. You can also start theGainCheck manually (see Pg. 22).Then a display test is also con-ducted and the software versiondisplayed.

Highway Addressable RemoteTransducer, digital communicationvia FSK modulation of the loop cur-rent

Mode code

One-point calibration

pH electrode system

Response time

Sensocheck

Sensoface

Slope

Two-pointcalibration

Zero point

Technical Terms 51

Preset four-digit number to selectcertain modes.

Calibration with which only the elec-trode asymmetry potential (zeropoint) is taken into consideration.The previous slope value is re-tained. Only one buffer solution isrequired for a one-point calibration.

A pH electrode system consist of aglass and a reference electrode. Ifthey are combined in one body,they are referred to as a combina-tion electrode.

Time from the start of a calibrationstep to the stabilization of the elec-trode potential.

Sensocheck continuously moni-tors the glass and reference elec-trodes.

provides information on the statusof the electrode. The zero point,slope and response time are eva-luated. The glass and referenceelectrodes are continuously moni-tored.

See Electrode slope.

Calibration with which the electrodeasymmetry potential (zero point)and slope are determined. Twobuffer solutions are required fortwo-point calibration.

See Assymmetry potential.

Index 52

Index

, 34

22 mA signal for alarm, 23, 35configuring, 25

A

Alarm, 23response time, 35

Alarm LED, 35

Alarm via loop current, 23, 35configuring, 25

Assembly, 8

Asymmetry potentialdefinition, 50display, 38

Automatic calibrationwith automatic cal temp detec-tion, 26with manual cal temp, 27

B

Buffer charts, 48

Buffer setdefinition, 50selecting, 25

Buffer solution, definition, 50

C

Cal info, 33, 38

Calibration, 26automatic

with automatic cal tempdetection, 26

with manual cal temp, 27Calimatic


with manual cal temp, 27data entry, 31definition, 50manual


with manual cal temp, 30temp probe adjustment, 32

Calibration buffer set, definition,50

Calibration data, display, 38

Calibration error messages, 37

Calibration mode, configuring, 25

Calibration timer interval, configur-ing, 25

Calimatic, definition, 50

Certificate of Conformity, 44

Cleaning, 39

Combination electrode, definition,50

Configuration, 24

Connectinghandheld terminal, 11lines, 11

Connecting cable, fixing, 11

Current source, 38

D

Declaration of Conformity, 47

Diagnostics functions, 38

Dimension drawings, 9

Display, 21

E

Electrode monitoring, Sensoface,22, 34

Electrode potential, display, 38

Electrode slopedefinition, 50display, 38

Electrode zero point, definition, 50

Error info, 33, 35, 38

Error message, last, 33, 35, 38

Error message via loop current,23, 35

configuring, 25

Error messages, 35–38

G

GainCheck, 22, 38definition, 50

Index 53

H

HART, definition, 50

HART communication, 23

Hold mode, 33

I

Input voltage, display, 38

Installation, 13

K

Keypad, 21

L

Loop current, 23configuring, 25display, instantaneous, 38frozen, 33Hold state, 25

M

Maintenance, 39

Manual calibrationwith automatic cal temp detec-tion, 29with manual cal temp, 30

Manual temperature specification,33

Measured variable, configuring,25

Measuring mode, 33

Messages, Sensoface, 34

Mode code, 6definition, 51

Mounting diagram, 9

mV measurement, 33

O

One–point calibration, 27, 28, 29,30

definition, 51

ORP measurement, 19

Outputs, 23

P

Packing list, 8

pH electrode system, definition,51

pH measurement, 33

Pipe mount kit, 10

Product line, 40

Protective hood, 10

R

Response time, definition, 51

S

Safety precautions, 5

Self–testautomatic, 38manual, 22, 38

Sensocheck, 34definition, 51on or off, 25

Sensoface, 22definition, 51diagnostics, 34messages, 34

Slopedefinition, 51display, 38

Smiley, 34

Software version, display, 22, 38

Specifications, 41

Stripping lengths, 11

T

Technical terms, 50

Temp probe adjustment, 32

Temperature detection, configur-ing, 25

Terminals, pulling out, 11

Two–point calibration, 29, 30definition, 51

Type Examination Certificate, 44

U

Unit self–test, automatic, 22

User Interface, 20

Index 54

W

WiringORP measurement, 19pH measurement, 14

Z

Zero point, definition, 51

Documents

Instruction Manual - Xylem Analytics Library/Resource... · Sensocheck limited to the glass electrode only 54 21 Temperature probe Combination electrode shield Fit jumper between