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Sensor Module
The pH and pH/ORP sensors feature user-replaceable sensor modules. These modules contain a reference solution that depletes
over time. The warranty period for both of these modules is 12 months:
• Replacement pH Module [SKU: 626963] =
12
months
• Replacement pH/ORP Module [SKU: 626964] =
12
months
Depending on usage and storage practices, the module may last longer than its warranty period. Replace the module if the sensor
exhibits a slow response time after trying all the cleaning methods listed above.
Module Replacement
1.
Peel off and discard the sticker that covers the junction of the sensor body
and the module.
2.
With a small, flat-blade screwdriver, carefully remove the square rubber
plug from the gap in the hard plastic ring at the base of the sensor
module.
3.
Using two fingers, squeeze the sensor module’s hard plastic ring so that it
compresses the gap left by the rubber plug.
4.
While squeezing, steadily pull the sensor module straight from the sensor
body, rocking slightly if necessary. Do not keep the used o-rings as they
are unusable after removal from the sensor body. Discard the old sensor
module.
5.
Inspect the sensor connector port for debris or moisture. If detected,
remove it with lint-free cloth or a light blast of compressed air.
6.
The new sensor module comes with two o-rings installed and pre-
lubricated. Visually inspect the o-rings for nicks, tears, contaminants or
particles. Replace any damaged o-rings.
NOTICE:
If a sensor module is removed for any reason, the o-rings must
be replaced.
7.
Align the prongs on the base of the sensor module with the slots in the
sensor body. The sensor module is keyed to insert in only one orientation.
Push the sensor module firmly into position until it clicks. Wipe any excess
o-ring lubricant from the assembled components.
8.
Wrap the junction of the sensor module and sensor body with the new
sticker included in the sensor module kit. The sticker helps keep the
sensor module junction clean and retain the rubber plug throughout
deployment.
9.
Write the replacement date on the sticker.
NOTE:
Be sure to calibrate the sensor after module replacement.
Sensors, Calibration, and Maintenance