IM 12B6C3-E-E
10-8 Appendix
10-7. Field Change Order
Software changes of the PH202
10-7-1. Changes made by software release 1.1
- The hardware and software of the PH202 has been modified in order to make the instrument suitable for
8 temperature sensors.
- Software version 1.0 supports only the PCB suitable for 5 temp sensors.
- Software version 1.1 is prepared to handle both versions of transmitters (the 5 and 8 temperature sensor
PCB’s). The new release will recognize (auto detection) which version is used.
10-7-2. Changes made by software release 1.2
- In order to operate the PH202 in combination with the model 275 Hand-Held Communicator (HHC) from
Fisher-Rosemount it is necessary that :
- the software of the PH202 is updated.
- the Model 275 is upgraded with the PH202-Device Description (DD).
- In case the instrument in programmed as pH device with second parameter rH-measurement enabled
(Service code 02), the instrument returned with an inverted rH value. This calculation is now corrected in
this software release.
- When MODE keypress during non-successful calibration (E0, E1, E2 ,E3), the error will be cleared
instead of leaving the (soft) error active.
- In case a Sample is taken, the sample can be viewed. In this Sample view menu, the 2nd process value
was the actual measured value instead of the wanted sample value. In this release, the sample value is
shown correctly.
10-7-3. Changes made by software release 1.3
- Sample calibration did not work correctly in case the Temperature Coefficient (T.C.) is other than zero. -
The change in pH due to this T.C. was incorrectly interpreted as a direct aspot change.
- In case the passcode check was enabled, and an incorrect passcode was entered, this caused to stop
functioning of the display and keyboard.
- Writing of instrument setting went wrong. Communication related update for handheld and PC202
operation. For PC202 operation with the PH202, this software version is necessary.
- In case manual temperature was enabled, any temperature error (E7, E8) was still displayed. the
temperature errors should be cleared automatically in the case of a manual temperature value.
10-7-4. Changes made by software release 1.4
- A problem with Automatic Test Equipment during manufacturing was solved.
10-7-5. Changes made by software release 1.5
- The rH calculation was incorrect. There was a sign-error in the calculation formula. Also a 304mV offset
voltage has been added in the calculation to make it right for a modern sensor. The rH calculation is
correct now for a pH-sensor with a buffer solution of pH 7 and an Ag/AgCl/KCl reference system . The
old calculation was based on a sensor with a buffer solution of pH 1 (with HCl reference system).
10-7-6. Changes made by software release 1.6
- Sensor check is switched OFF now during the start of CAL to prevent an unclear situation for the
customer.
- Temperature errors were not switched OFF during MANTEMP.
- During INIT sometimes characters were missing in the messageline.
- During QIS the ORP measurement stops at 1220 mV. This has been changed so ORP can be measured
up to 1500 mV. Also temperatures below -10 ºC were not shown correctly.
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