IM 12B6B3-E-H
10-8 Appendix
10-6-5. Changes made by software release 1.5
In release 1.3 sometimes a spike on the current output occurs. The repetition rate is very low (each week
once or twice) and irregular. In release 1.5 this problem is solved.
REMARK: this new version is based on release 1.3 and therefore does not have the functionality of release
1.4.
10-6-6. Changes made by software release 1.6
- In version 1.6 the new functions of 1.4 and 1.5 are combined.
10-6-7. Changes made by software release 1.7
- The software version 1.7 for the PH402 is functional identical to the software version 1.6, only small soft-
ware changes for production improvement have been done.
10-6-8. Changes made by software release 1.8
- 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 cor-
rect 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).
- The instrument locked up when entering a wrong password.
- When manual temperature is active and HIF is entered, the manual value is showed for all temperature
sensors.
- To improve EEPROM integrity the PEN (Program Enable) Pin is only enabled when there is an write-com-
mand to the EEPROM
- Sample calibration is not correct when the Temp. Comp. <> 0. The offset due to the T.C. is wrongly
processed as a calibration correction.
10-6-9 Changes made by software release 1.9
- Sensor check is switched OFF now during the start of CAL to prevent an unclear situation for the cus-
tomer.
10-6-10 Changes made by software release 2.0
- Service code 79 added for loading all defaults except pH buffer tables.
- No longer PIN needed for PI, communication and logbook scrolling.
- Select in service code 53 to do/don’t toggle the failcontact periodically in case of a softfail.
- Default *T.COEFF changed from 0.00 into -0.00.
- 10k PTC added
10-6-11 Changes made by software release 2.1
- Bug fixed in configuring contact S$ as control contact.
10-6-12 Changes made by software release 2.2
- E20 is cleared after the programmed data was recovered.
10-6-13 Changes made by software release 2.3
- Prevent incorrect values in case open temperature input and manual temperature setting.
10-6-14 Changes made by software release 3.0
- The maximum ORP span is set to 3000mV (was 2000mV)
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