DH Instruments PPC2+, Manual

Page: 140 / 166

PPC2+™ Operation and Maintenance Manual
©2001 DH Instruments, Inc.
Page 132
5.2.7 RPT CALIBRATION/ADJUSTMENT WITHOUT CALTOOL FOR RPTS
SOFTWARE
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PRINCIPLE
The reference pressure transducers can be calibrated and adjustments made without
using CalTool for RPTs software. This requires:
•
Applying pressures with a calibration standard and recording the pressures measured
by PPC2+.
•
Calculating new PA/PM values and entering them.
•
Setting ZNATERR for the calibrated range (if the RPT is absolute, will be operated in
absolute measurement mode and the autozero function will be used
between calibrations).
,OPY\OZ\YMOONSXQ^YMKVSL\K^OK\OPO\OXMOZ\O]]_\O^\KX]N_MO\aS^RY_^_]SXQ-KV>YYV
PY\<:>]]YP^aK\O=OM^SYX]-KVSL\K^SYXYP<OPO\OXMO:\O]]_\O>\KX]N_MO\]
:<38-3:6/ /[_SZWOX^ <O[_S\ON =O^_Z KXN :\OZK\K^SYX ]RY_VN LO
\O`SOaON^RY\Y_QRVc
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OPERATION
A typical procedure for calibrating an RPT range is:
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Set-up and prepare the PPC2+ for calibration (see Sections 5.2.2., 5.2.3).
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From the main run screen, using the [RANGE] function key, select the reference
transducer and range to be calibrated (see Section 3.2.1). Set the HEAD to zero
using the HEAD function (see Section 3.2.7). Turn AutoZ ON if it is left ON in normal
PPC2+ operation (see Section 3.4.1).
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Pressing [SPECIAL], <4Internal>, <2Cal>, <1RPT>, <1view>, read and record the
current values of PA/PM.
‚
Pressing [SPECIAL], [1Autoz], [2View], read and record the current value of
ZOFFSET (for absolute RPT in absolute mode only).
ƒ
Run the calibration pressures for the range recording the pressure applied by the
standard and the PPC2+ reading at each calibration point. Dwell at least two minutes
after setting the reference pressure at each point to allow full stabilization The data
recorded is the “as received” data for this calibration.