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Chapter 4 21
Maintenance
Chapter 4
Maintenance
This chapter describes the maintenance of the Water Analyzer.
General Sensor Maintenance
The Water Analyzer normally requires only minimal maintenance, aside from
periodic calibration. The frequency of required calibration will depend upon
the accuracy of the readings desired, the frequency and manner in which the
meter is used, and the storage condi-
tions. Figure 4.1 shows the location of
each of the sensors in the probe.
Each of the sensors (pH, dissolved
oxygen, and conductivity) are field
replaceable. To remove a sensor (pH,
dissolved oxygen, or conductivity)
for service:
1. Remove the probe guard.
2. Firmly pull the sensor straight
out from the probe body.
Once removed, the sensor can be cleaned or replaced if needed.
When a sensor is out of the probe, do not put the probe in any water. Placing a
probe in water at this time will destroy the electronics within the probe and
invalidate the warranty. When replacing a sensor in the probe, silicone grease
(included with your meter) needs to be applied to the connector end of the
sensor body. Apply a drop of silicone grease to the edge of the sensor body.
Note: Do not allow any silicone grease to get on the connectors. If any
silicone grease gets on the connectors, clean it off with alcohol. The
silicone acts as a barrier and will interfere with the sensor/probe
communication.
Insert the sensor by pushing and twisting 360° until the retainer ring is in
place. This will ensure that the entire outer circumference of the sensor has
silicone on it. The silicone increases the O-ring water tightness ability.
CAUTION:
When a sensor is
out of the probe,
do not put the
probe in any
water.
CAUTION:
Do not use any
tools to pry the
sensor out from
the probe body—
this may damage
the sensor.
Figure 4.1. View of Probe Without Sensors
pH
Conductivity
Dissolved Oxygen