Fluke 6270A, Service Manual, Page: 71 / 144

Pressure Controller/Calibrator
PCM Assembly
65
See Figure 38 for examples of what to inspect for.
•

make sure there is a good valve indentation on the body surface
where it has made continuous contacted with the orifice.
•

look for specks on the surface of the indentation. This can cause the
valve to leak.
•

if tape is in the valve base, the tape could cause intermittent leaks or
control issues.
•

if tape is in the valve body spring, this tape causes control issues and
leads to leaks if it obstructs the orifice and valve surface.
4
3
1
2
hxn406.eps
Figure 38. Inspection