Fluke HPMS - Manual (Page 121)

5. MAINTENANCE, ADJUSTMENTS AND CALIBRATIONS
Page 111 © 2007 DH Instruments, a Fluke Company
 OPERATION
See Section 5.3.7 for more detailed information on editing and viewing Q-RPT calibration
information.
Turning absolute mode operation ON and OFF for a Q-RPT occurs in the same area in which
calibration coefficients are edited. To access the Q-RPT calibration editing area press
[SPECIAL], <8cal> and select the desired Q-RPT. Then select <1edit> to make changes.
[ENT] through the calibration information screens.
After viewing the values of PA and PM the display is:. Allow absolute Hi
meas mode: 1off 2on
The cursor is on the number corresponding to the current selection. Make the desired selection.
<1no> causes absolute mode to be unavailable for the Q-RPT.
5.3.6 Q-RPT CALIBRATION USING CALTOOL FOR Q-RPTS SOFTWARE
To calibrate RPM4 Q-RPTs using CalTool software, refer to Sections 5.3.1, 5.3.2, 5.3.3
and 5.3.4 in this manual and then refer to the CalTool for Q-RPTs Software Manual.
CalTool for Q-RPTs software and manual are supplied on the RPM4 A70M/A20M
Support Disk and can be downloaded from www.dhinstruments.com.
5.3.7 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
– See Section 3.5.1 for complete AutoZero
information. This value is must be set to zero for a Q-RPT that just been calibrated. It
should be set to zero before making adjustments.
• The value of PA – The pressure adder for the selected Q-RPT (see Section 5.3.1.1).
• The value of PM – The pressure multiplier for the selected Q-RPT (see Section 5.3.1.1).
• Absolute measurement mode ON or OFF – See Section 3.3.3,  PRINCIPLE for
complete information on measurement modes. This is set to OFF if a Q-RPT was
calibrated in gauge mode with a gauge pressure standard.
 OPERATION
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 3.5.5.5).
A new RPM4 is delivered with PA and PM values set to zero and 1 for all ranges. This does not
mean that the RPM4 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.