Ph/Temperature - Maritime G6100 Operation Manual

Water Monitoring System
Cleaning guide for G6111 PAH measuring chamber
1. Remove the PAH sensor
2. Soak the chamber in a solution of warm water and solvent
3. Let the solution work for 10 minutes
4. Use a brush or rag to remove fouling from the PAH chamber
5. Flush with clean water
6. Dry the PAH chamber with a new clean rag.
7. Inspect O-rings
8. Mount the PAH sensor and secure it with the locking plate and locking pins
9. Turn all valves to RUN and observe for leaks

12.3 PH/Temperature

RESETTING CALIBRATION OFFSET
The pH sensor and pH electrode must be calibrated together in order to represent a
functional pH-meter. Calibration data is stored within the pH sensor while the pH electrode
acts as the sensing element.
During field calibration, the factory calibration data within the sensor is
updated/overwritten in order to compensate for the deterioration of the pH electrode. If a
defective pH electrode has been replaced by a new electrode, then the calibration data must
be overwritten. However, the field calibration data stored in the sensor will not match the
new pH electrode – resulting in the new electrode giving measurements that are offset
compared to expectations.
If the offset is too large, then the pH sensor will not accept the field calibration data as
valid (Error code: The red LED on the PH sensor flashes every second). In order to
remove the calibration offset, an intermediate buffer solution must be mixed – refer to
example 1 + 2 in the following tables:
Ver.5.0 – Revision March 2022 Page 69 of 110