Fluke PG9000 Series, Operation And Maintenance Manual

Page: 87 / 202

3. GENERAL OPERATION
Page 77 © 2011 Fluke Calibration

When PG9000 indicates Ready on all Ready/Not Ready indicators (see Section 3.4), record the
measured DUT pressure and the calculated reference pressure as indicated on the top line of
PG9000 display.

Close the vacuum reference pump shutoff valve, open vacuum vent valve. Wait for
pressure under bell jar to return to ambient. Remove bell jar. If an AMH system is active
and mass loading resolution is 0.1 kg, the vacuum does not need to be broken and
reestablished at each increment since the masses are moved automatically.

Repeat Steps

through

for each desired pressure point.
3.10.11.1 [ENT / SET P] In Pressure-to-Mass mode

PURPOSE
To set a target pressure. (see Section 3.10.12).

OPERATION
Put the PG9000 in pressure-to-mass operation mode (see Section 3.10.12), then
press [ENT / SET P] in any run screen. If automated rotation is on, the
<DECELERATING> screen shows until piston deceleration is complete.
Note
Pressing [ENT] in the run screen causes automated pressure
generation to be suspended if ON (see Section 3.10.9) and
AutoRotate to stop piston rotation if ON (see Section 3.10.8).
When [ENT] is pressed to confirm mass entry, automated
pressure generation and/or motorized rotation resume.
The display is:
1. Current measurement mode (see Section
3.10.4). “a’ = absolute
2. Current pressure unit of measure (see Section
3.10.3).
3. Entry field for the target value of pressure to
be set.
Target pressure:
100.0000 kPa a
Use the numerical keys to enter the target pressure value desired.
Press [ENT / SET P] to process the target pressure value. If the pressure value
entered cannot be executed, an explanatory error message is displayed
momentarily and operation returns to the target pressure entry screen with the
previous target pressure value displayed. If the target pressure value entered is
valid, the value is processed and operation proceeds to the mass loading
instruction screen. This step is skipped if an AMH is being used. For a manual
mass set, the display is:
1. Mass to load using trim masses. This field will
be 0.00 if using default mass loading
resolution of 0.1 kg.
2. Nominal mass to load using main and
fractional masses.
Load nominal mass:
10.1 kg and 0.00 g
Note
If an AMH system is active and mass loading resolution is set to
0.1 kg, the AMH loads the mass automatically. As it does, the
steps of its operation are displayed. If resolution is set to
higher than 0.1 kg, the operator is prompted to load the trim
mass value.
With PG9000 in absolute by vacuum measurement mode (see Section 3.10.4),
the instruction is
<Load mass & vac> indicating that the nominal mass value
should be loaded and then the bell jar should be installed and vacuum
established under the bell jar.