Hach Chlorine Sensor - Data log; Modbus registers; Maintenance; Maintenance schedule

Data log
The controller provides one data log for each sensor. The data log stores
the measurement data at selected intervals (user configurable). The data
log can be read out in a CSV format. For instructions on downloading the
logs, please refer to the controller user manual.
Refer to Select the parameters on page 11 for information about setting
time intervals for data storage in the data log.
Modbus registers
A list of Modbus registers is available for network communication. Refer
to the manufacturer's website for more information.
Maintenance
W A R N I N G
Multiple hazards. Do not disassemble the instrument for maintenance.
If the internal components must be cleaned or repaired, contact the
manufacturer.
C A U T I O N
Multiple hazards. Only qualified personnel must conduct the tasks
described in this section of the document.
Maintenance schedule
Maintenance task Frequency
Polish the electrode When sensor readings are unstable or
the slope is too low
Replace the membrane cap
6
1 year
(The cap may need to be replaced
more often depending on water
quality.)
Maintenance task Frequency
Replace the electrolyte 3 to 6 months
Replace the sensor 3 years
(The sensor may need to be replaced
more often depending on water quality
and application.)
Remove the sensor from the flow cell
Note: The sensor can be removed from water for up to 1 hour to do maintenance
on the sensor. The membrane cap and electrolyte will need to be replaced after
1 hour.
6
The electrolyte is replaced when the membrane cap is replaced.
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