DH Instruments PPC2 AF - Activating Calibration Results; The Reference Pressure Transducers Can be Calibrated Without Using the On-Board Calibration Function. this Requires

5. MAINTENANCE, ADJUSTMENTS AND CALIBRATION
Page 115 © 1998 DH Instruments, Inc.
If no changes have been made to the range selected, the prompt "This range not
calibrated" will be displayed.
If the PA/PM of the range selected have been changed by carry over of the
PA/PM from another range, the new PA/PM and PA(z)tare can be previewed.
If the range selected has been calibrated, the new PA/PM and PA(z)tare can be
previewed along with displays of "as left" data showing the calibration pressure
applied by the standard and reference transducer reading using the new PA/PM
at each point.
To leave the preview function and proceed to activation of calibration results,
press 2No in the "Preview?" screen.
5.4.4.7 ACTIVATING CALIBRATION RESULTS
 OPERATION
The display is:
Hi ref cal complete
Activate? 1Yes 2No
Press 1Yes to activate the results of the current calibration procedure including
changing of PA/PMs, recording of as left data if available and changing the
recorded calibration date. An activate screen will appear momentarily before
returning to the "Run cal" screen.
Press 2No to go to the abort calibration procedure.
Reference Transducer Calibration Without Using the On-Board Transducer
Calibration Function.
 PRINCIPLE
5.4.5 THE REFERENCE PRESSURE TRANSDUCERS CAN BE
CALIBRATED WITHOUT USING THE ON-BOARD
CALIBRATION FUNCTION. THIS REQUIRES:
1. Applying pressure with a calibration standard and recording the pressures measured by
PPC2 AF.
2. Calculating new PA/PM values and entering them.
3. Setting PA(z)tare for the calibrated reference pressure transducer.
Before proceeding to calibrate a reference pressure transducer without using the
on-board calibration routine, sections 5.4.1 to 5.4.4 should be reviewed thoroughly.
 OPERATION
The following provides a recommended procedure for calibrating a range of a reference transducer:
1. Set-up and prepare the PPC2 AF for calibration (see Sections 5.4.2 and 5.4.3).
2. From the main run screen, using the RANGE function key, select the reference
transducer and range to be calibrated (see Section 3.2.1).
3. Under SPECIAL, 4Internal, 2Cal, 1View, 2Ref, read and record the current values of
PA/PM.
4. Under SPECIAL, 4Internal, 1AutoZ, 1View, read and record the current value of PA(z)net.
5. Run the calibration pressures for the range recording the pressure applied by the
standard and the PPC2 AF reading at each calibration point. The data recorded is the "as
received" data for this calibration.