13
B. Sensor Cap Replacement
The sensor cap should be replaced about once per year but may
last longer. It should also be replaced if it is cracked or damaged
(see Troubleshooting section for instructions on how to inspect the
cap for damage). The instruction sheet shipped with the
replacement LSDO sensor cap includes the calibration coefficients
specific to your sensor cap.
The replacement LSDO sensor cap is shipped in a humidified
container. The package should not be opened until ready for use.
Once the sensor cap has been installed on the sensor as described
below, it is important to keep the sensor in a 100% humid
environment. Therefore, the sensor should be stored in either the
gray calibration/storage sleeve with a moistened sponge or
immersed in water, see Sensor Storage for more information. If the
sensor dries out, refer to the Rehydration procedure in this manual.
Refer to Figure 7 below when following the instructions for replacing
the cap.
[Note:
Avoid touching the sensing end of the sensor cap during the
following maintenance procedures.
]
Figure 7
1. Remove the old sensor cap assembly from the sensor by
grasping the probe body with one hand and then rotating the
sensor cap counterclockwise until it is completely free. Do not
use any tools for this procedure.
2. Inspect the o-ring on the probe for damage. If there is any
indication of damage, carefully remove the o-ring and replace
it with the new o-ring included with the replacement sensor
cap. Do not use any tools to remove the o-ring.
3. Ensure that the o-ring installed on the probe is clean. If
necessary, wipe clean with a lint free cloth or replace the
o-ring as described in the previous step.
