To Monitor High Vacuum Pressure - HP 5973 MSD Hardware Manual

 CI operation
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To monitor high vacuum pressure

Materials needed:
Gauge controller (HP 59864B)
Triode gauge cable (8120-6573)
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1 Connect the gauge controller to the triode gauge tube. See page 100.
2 Start up and pump down the MSD. See page 40.
3 Switch on the power switch on the back of the gauge controller.
4 Press and release the
After a few seconds, the pressure should be displayed.
Pressure is displayed in the format
Units are Torr.
The gauge controller will not turn on if the pressure in the MSD is above approxi-
mately 8 × 10
triode gauge tube can measure pressures between approximately 8 × 10
3 × 10
in this manual are for helium.
The largest influence on operating pressure is the carrier gas (column) flow. The
following table lists typical pressures for various helium carrier gas flows. These
pressures are approximate and will vary from instrument to instrument.
62
GAUGE
-3
Torr. The gauge controller will display all 9s and then go blank. The
-6
Torr. The gauge controller is calibrated for nitrogen, but all pressures listed
button.
where is the base 10 exponent.
X.X – X – X
-3
and