PCM-2 Manual.pdf - Voss Associates

exercising care to avoid detatching the taped-on nutplate. Adjust the switch
body inward against the actuator arm until the switch contacts just make and
then tighten the mounting screws. This should yield a sensitive switch
adjustment which requires only a slight deflection of the hip switch actuator
rod to trip the switch. Readjust the switch position until this sensitive
switch actuation setting is acheived.
On later PCM-2's (Serial no's 219 & subsequent), the hip position switch
and mounting bracket are different in style and design. This improved hip
switch design offers greater reliability and ease of replacement. Removal of
this switch is simply a matter of removing the island's front cover panel and
then removing the two flathead screws which secure the switch mounting
bracket to the inner left-hand flange of the internal backing plate near the
top of the island panel. This will allow the switch and its wiring, attached
to the mounting bracket, to be extracted foreward through the front of the
island panel. Note the relative axial mounting position of the switch plunger
end to the near surface of the mounting bracket. This dimension is critical
for remounting the new switch in the position required to yield the correct
switch acutation sensitivity. The switch can then be removed from the
mounting bracket by loosening and removing its two jam nuts and
disconnecting the switch wires at the molex connector. Replacement of the
new switch assembly is in the reverse order of the removal operations listed.
Note that this "barrel" type switch has no audible indication of actuation and
should thereby be verified for same via an electrical continuity test. Again,
the proper adjustment for this hip poistion switch will result in switch
contact release with only a slight displacement of the hip switch actuator
rod.
A kit which retrofits the old style PCM-2 hip position switch with the new
improved style switch is available as Eberline part no. YPI1534592, Hip
Switch Retrofit Kit.
There are no other standard mechanical or electrical components in the PCM-2
which require scheduled repair or replacement. Please contact Eberline Customer
Service reguarding PMC-2 instrument repair or warranty repair concerns which
exceed the scope of "preventative" or "routine" maintenance described herein.
Reference the Warranty Repair information sheet at the front of this manual.
Decontamination
Cleaning
The PCM-2 has been designed to allow relative ease of decontamination by
providing user interface surfaces and detector panels made of stainless steel. The
stainless steel material enables the use of water, detergents, and even mild
solvents and lor abrasives in the decontamination process without damaging or
reducing the working life of the detector panels' surfaces.
Note: It is not recommended that a pressurized flow of water and/or other
cleaning agents be used when cleaning the external surfaces of the instrument for
9-4
Pr:M7.MAN/ Rpv A/Aprill']']"