Fluke PG9000 Series, Operation And Maintenance Manual

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3. GENERAL OPERATION
Page 85 © 2011 Fluke Calibration
Select <2ambT> to specify the ambient temperature variable source for the temperature
values that are used to calculate ambient air density. Selecting <2ambT> offers the
temperature variable source choices:
<1internal>:
Use real time readings from PG9000’s ambient temperature platinum resistance
thermometer
in the Temperature - Humidity (TH) Probe
.
<2normal>:
Use a fixed value of 20
°
C.
<3user>:
Use a fixed user defined value. If <3user> is selected, the user value must be
entered, in degrees Centigrade (
°
C).
Select <3%RH> to specify the relative humidity variable source for the relative humidity
values that are used to calculate ambient air density. Selecting <3%RH> offers the relative
humidity variable source choices:
<1internal>:
Use real time readings from PG9000’s relative humidity sensor
in the
Temperature - Humidity (TH) Probe
.
<2normal>:
Use a fixed value of 45 %RH.
<3user>:
Use a fixed user defined value. If <3user> is selected, the user value must be
entered, in percent relative humidity (%RH).
Select <4PCT> to specify the piston-cylinder temperature variable source for the temperature
values that are used to compensate for thermal expansion of the piston-cylinder effective
area. Selecting
<4PCT> offers the temperature variable source choices:
<1internal>:
Use real time readings from PG9000’s on-board piston-cylinder temperature
platinum resistance thermometers (embedded in the piston-cylinder module
mounting post).
<2normal>:
Use a fixed value of 20
°
C.
<3user>:
Use a fixed user defined value. If <3user> is selected, the user value must be
entered, in degrees Centigrade (
°
C).
Select <5g> to specify the value of acceleration due to gravity that is used in calculating the
force applied to the piston. Pressing <5g> offers the gravity variable source choices:
<1locall>:
Use the fixed value of local gravity stored under [SPECIAL] , <6gl> (see Section
3.12.6).
<2normal>:
Use a fixed value of 9.806650 m/s
2
.
<3user>:
Use a fixed user defined value different from the current local gravity value
stored in the
[SPECIAL] , <6gl> menu option. If <3user> is selected, the user
value must be entered in units of meters per second squared (m/s
2
).
Select <6READY> to edit the values of Ready/Not Ready status criteria (see Section 3.4).
These include:
<1Pposition>:
Piston position limits. Edit the fixed value, in millimeters (mm), of the band
around mid-float position within which the piston position is
Ready (see
Section 3.4.1). This also determines the limit at which the piston is refloated by
the GEN function when GEN is ON (see Section 3.10.9).
<2vac>:
Maximum reference vacuum pressure when operating in absolute by vacuum
mode. Edit the value, in Pascal (Pa), under which the reference vacuum must
be for a vacuum
Ready condition to occur (see Section 3.4.3).