Fluke PG9000 Series, Руководство по эксплуатации и обслуживанию

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PG9602™ OPERATION AND MAINTENANCE MANUAL
© 2011 Fluke Calibration Page
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5.2 Platform
The PG9000 Platform consists of the PG9000 Base, PG Terminal and the PG9000 Remote Electronics
Module (REM). Local user interface is through the keypad and display on the PG Terminal. Remote
communications and on board (built in) sensors are connected to the REM or located inside.
5.2.1 Calibration / Adjustment Of On-board Measurement
Functions
5.2.1.1 Principles
The PG9000 Platform includes sensors to measure ambient and instrument
conditions. These sensors may need calibration or adjustment. The calibration
and/or adjustments are performed using functions accessed by pressing
[SPECIAL] and selecting <7cal> .
The on-board measurement functions that can be adjusted or calibrated include:
•
Barometric pressure sensor – internal to REM
•
Relative humidity sensor – TH Probe external to REM (Hart 2626-S)
•
Ambient temperature sensor – TH Probe external to REM (Hart 2626-S)
•
Piston-cylinder module temperature sensors – Internal to mounting post
•
Piston position measurement system – Internal to Base
•
Reference vacuum gauge (optional) – External to bell jar
The measurement uncertainty specification of the on-board sensor should be
taken into consideration when selecting a reference relative to which to adjust
them (see Section 1.2.1.3). The ambient pressure, temperature and relative
humidity sensors do not require a high level reference. They are typically verified
and adjusted relative to a reference without being removed from the platform.
The PG9000 CAL function supports a user defined adder and multiplier that are
used to offset and, if necessary, adjust the slope of the sensors output. The adder
and multiplier adjust the sensor output as follows:
Corrected Output = (Measured Output X Multiplier) + Adder
Where:
•
Corrected output, measured output and adder are in the current unit of
measure of the sensor
•
Multiplier is dimensionless
[SPECIAL] , <7cal> provides capabilities to view internal sensor outputs and edit
the Adders and Multipliers. The CAL view function provides an additional digit
of resolution relative to other displays of internal sensor outputs. To calibrate
or adjust the on-board sensors, compare their outputs to a reference and
adjust the corresponding Adder and/or Multiplier as needed to arrive at
acceptable agreement.
5.2.1.2 Barometric Pressure Sensor

PURPOSE
To view and adjust the output of the on-board barometric sensor.