NEP-9500 MANUAL V1.01
Observator Instruments V1.01
Copyright 2017
©
Page 21
3. To change the wiper, loosen the set screw in the wiper arm until the wiper assembly can be
removed from the wiper shaft.
4. Place a new wiper assembly on the shaft with the set screw aligned squarely with the flat on
the wiping shaft. Gently press the wiper arm down until the wiper arm hits the stop of the
shaft. The wiper pad should now be compressed to roughly one half its original thickness.
Tighten the set screw – do not over tighten. It is important that the wiper arm does not make
contact with the probe face – only the pad should be in contact. A gap of 0.5mm between
the wiper arm and the optic face is typical when a new pad has been properly installed.
Note: It is imperative that the set screw be fastened squarely aligned onto the flat on the shaft
otherwise proper operation will be affected.
CAUTION: Do not over tighten the set screw or manually attempt to rotate the wiper arm once
set onto the shaft. Any attempt to manually rotate the wiper may cause gearbox damage and
void the warranty.
