horiba U-51, Инструкция по эксплуатации

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4 Maintenance
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4.5 Replacing the turbidity sensor
1.
Press the control unit’s POWER key for about 1 second to turn the power OFF.
Note
The operation keys are designed to operate using the pad of a finger, sharp objects can tear the
control unit cover damaging the operation keys.
2.
Remove the sensor guard, and clean the sensor probe with tap water.
3. Use dry air to blow away and dry off any moisture.
4. Remove the three screws holding the turbidity sensor by using No. 2 Phillips head
screwdriver.
5.
Pull out the turbidity sensor horizontally.
6.
Remove the rubber wiper and gasket, and use a soft cloth to wipe off any dirt from
the wiper shaft and turbidity sensor attachment. If parts are very dirty, use a soft
cloth soaked in neutral detergent or alcohol.
7.
Replace the rubber wiper and gasket with new ones. Coat the gasket with a thin
layer of grease (No. 3014017718).
8. Attach the new turbidity sensor and fasten it in place with the three screws.
9.
Perform four-point calibration before using the sensor.
Note
Do not mistake the combination of sensor probe and turbidity sensor. If the combination is not
correct, sensor and sensor probe might be broken. #7800 has to be connected to U-52/U-52G. #7801
has to be connected to U-53/U-53G. #7802 has to be connected to U-54/U-54G.
Screw
Turbidity sensor
Rubber wiper
Wiper shaft
Gasket