DH Instruments PPC4, Руководство по эксплуатации и обслуживанию

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7. MAINTENANCE, ADJUSTMENTS AND CALIBRATION
Page 191 © 2009 DH Instruments, a Fluke Company
Note
PPC4 may also use external Q-RPTs mounted in RPM4 Reference
Pressure Monitors. Viewing and adjustment of RPM4 calibration
information is performed locally on the RPM4, not through PPC4
(see the RPM4 Operation and Maintenance Manual).
7.2.6 Q-RPT Calibration Using CalTool for RPTs Software
To calibrate PPC4 Q-RPTs using CalTool software, refer to Sections 7.2.1, 7.2.2 and 7.2.3 in
this manual and then refer to the CalTool for RPTs Software Manual.
CalTool for RPTs software and manual are supplied on the PPC4 General Accessories Disk
(white CD) and can be downloaded from www.dhinstruments.com.
7.2.7 Editing and Viewing Q-RPT Calibration Information

PURPOSE
View and/or edit Q-RPT calibration information fields including:
•
The calibration date – This field is normally used to record the date on which the Q-RPT
is calibrated.
•
The value of absolute mode AutoZero P
offset
(Axxx Q-RPTs only) – See Section 3.2.22
for complete AutoZero information. This value is normally set to zero following absolute
measurement mode calibration of an Axxx Q-RPT.
•
The value of PA – The pressure adder for the selected Q-RPT (see 7.2.1.1).
•
The value of PM – The pressure multiplier for the selected Q-RPT (see 7.2.1.1).
•
Absolute and negative gauge measurement modes ON or OFF (Axxx Q-RPTs only)
– See Section 3.2.11 for complete information on measurement modes. This is set to
OFF if the Axxx Q-RPT was calibrated in gauge mode with a gauge pressure standard
(see Section 7.2.5).

OPERATION

Caution
As editing PA and PM values will change the calibration of the Q-RPTs, the
edit function should only be used by qualified personnel as part of the
calibration process. Caution should be taken to avoid accidental editing.
A user level security system is available to control access (see Section
3.2.26.5).
Note
•
A new PPC4 is delivered with PA and PM values set to zero and 1 for all
ranges. This does not mean that the PPC4 has not been calibrated. In
the original factory calibration, privileged factory coefficients are used
for calibration with the user PA and PM set to zero and 1.
•
PA is always in units of Pascal (Pa). PM is dimensionless.
•
PPC4 may also use external Q-RPTs mounted in RPM4 Reference
Pressure Monitors. Viewing and adjustment of RPM4 calibration
information is performed locally on the RPM4, not through PPC4 (see
the RPM4 Operation and Maintenance Manual).