Campbell Scientific Hydro-Wiper-C Operation Manual from Zebra-Tech - Manual (Page 6)

Hydro-Wiper operation manual
Zebra-Tech Ltd 5
LED Blink sequence Description
1 Normal operation
2 Previous wipe failed
3 Low battery shutdown
Table 2. LED blink sequence
Low battery shutdown occurs when the battery pack reaches around
6.5 volts. In this mode no further wipes are performed.
When the Hydro-Wiper is switched on, the wiper will perform an
immediate wipe.
When closing the battery housing cap prior to deploying, always
service the O-ring;
1) Using the O-ring pick provided with the Hydro-Wiper,
carefully remove the O-ring from the groove in the wiper
housing.
2) Clean the O-ring, and the O-ring groove using a tissue. Also
clean the sealing face on the inside of the cap.
3) Wipe some O-ring grease, provided with the Hydro-Wiper,
onto the sealing face on the inside of the cap, and also onto
the O-ring.
4) Replace the O-ring into the groove in the battery housing
Screw the cap onto the battery housing until it is just hand tight. Do
not over tighten or use the cap shifting tool to tighten the cap.
The wiper drive shaft features a slip mechanism, so the wiper arm
can be manually moved if necessary, without causing any damage.
This also protects the gearbox from damage in the event the wiper
arm is subject to force or shock loading.
The Hydro-Wiper routinely monitors the position of the wiper arm. If
the wiper arm is moved in front of the turbidity sensor, the Hydro-
Wiper will detect this, and move the wiper arm to one side.
If the wiper arm becomes jammed at any stage during a wipe, the
direction of rotation will be reversed in an attempt to dislodge the
obstruction. If this is un-successful, the Hydro-Wiper will abort the