Yokogawa EXA PH202 2-Wire pH/ORP Analyzer User Manual

Page 3

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IM 12B07D02-01E

4. Operation; Display Functions And Setting ...................................................... 4-1

4-1. Operator interface ........................................................................................... 4-1

4-2. Explanation of operating keys ......................................................................... 4-2

4-3. Setting passcodes .......................................................................................... 4-3

4-3-1. Passcode protection ........................................................................................................4-3

4-4. Display examples ............................................................................................ 4-3

4-5. Display functions ............................................................................................ 4-4

4-5-1. Display functions pH (default)..........................................................................................4-4

4-5-2. Display functions pH (ORP).............................................................................................4-5

4-5-3. Display functions pH (rH).................................................................................................4-6

5. Parameter setting ............................................................................................... 5-1

5-1. Maintenance mode ......................................................................................... 5-1

5-1-1. Manual temperature selection and adjustment ...............................................................5-2

5-1-2. Process temperature measuring in ORP mode...............................................................5-3

5-1-3. Manual activation of HOLD..............................................................................................5-4

5-1-4. Manual impedance check ................................................................................................5-5

5-2. Commissioning mode ..................................................................................... 5-6

5-2-1. Output range ....................................................................................................................5-7

5-2-2. Hold ..............................................................................................................................5-8

5-2-3. Service ...........................................................................................................................5-10

5-3. Notes for guidance in the use of service coded settings ...............................5-11

5-3-1. Parameter specific functions .........................................................................................5-11

5-3-2. Temperature compensation and measuring functions. .................................................5-13

5-3-3. Calibration functions ......................................................................................................5-15

5-3-4. mA output functions .......................................................................................................5-17

5-3-5. User interface ................................................................................................................5-19

5-3-6. Communication setup ....................................................................................................5-21

5-3-7. General .........................................................................................................................5-21

5-3-8. Test and setup mode ....................................................................................................5-21

6. Calibration ....................................................................................................... 6-1

6-1. Automatic calibration ....................................................................................... 6-1

6-2. Manual calibration ........................................................................................... 6-1

6-3. Sample calibration .......................................................................................... 6-1

6-4. Data entry ....................................................................................................... 6-1

6-5. Calibration procedures .................................................................................... 6-2

6-5-1. Automatic calibration .......................................................................................................6-2

6-5-2. Automatic calibration with HOLD active ..........................................................................6-3

6-5-3. Manual calibration (2nd parameter calibration) ...............................................................6-4

6-5-4. Sample calibration ..........................................................................................................6-6

7. Maintenance ....................................................................................................... 7-1

7-1. Periodic maintenance for the EXA transmitter ................................................ 7-1

7-2. Periodic maintenance for the sensor system .................................................. 7-1

7-3. Calibration procedures are described in step-by-step detail in chapter 6. ..........

However, follow these guidelines. .................................................................... 7-2

8. Troubleshooting ................................................................................................. 8-1

8-1. Diagnostics ..................................................................................................... 8-2

8-1-1. Off-line calibration checks ...............................................................................................8-2

8-1-2. On-line impedance checks ..............................................................................................8-2

9. Spare Parts ....................................................................................................... 9-1

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