DH Instruments PPC2+, Manual

Page: 143 / 166

PPC2+™ Operation and Maintenance Manual
Page 135
©2001 DH Instruments, Inc.
5.4.1.2 USER ADJUSTMENT OF ANALOG MEASUREMENT RANGES
AND CHANNELS
For each channel in at each range, user definable measuring modifiers are available.
The measured signal is modified using an Adder and a Multiplier. The initial
measurement is multiplied by the Multiplier and then the Adder is added following:
Displayed value = (Meas X Multiplier) + Adder;
The analog input option automated internal calibration function described in
Section 5.4.1.1, Automated Internal Calibration, always operates and the results are
applied the measurement values before the Adders and Multipliers are applied.
This allows the internal calibration cycle to continue to assure the stability over time of
the analog measurements relative to the internal references even when Adders and
Multipliers have been used to cause the analog measurements to agree with an
external standard.
The Adder and Multiplier values can be changed through the front panel (see
Section 5.4.2) or by a remote command (see Section 4.4).
+XOa::-aS^R^ROKXKVYQSXZ_^YZ^SYXS]NOVS`O\ONaS^R+NNO\KXN7_V^SZVSO\`KV_O]
]O^^Y&(KXN&(PY\KVV\KXQO]SO^ROcRK`OXYOPPOM^>RS]NYO]XY^WOKX^RK^
^ROKXKVYQSXZ_^YZ^SYXRK]XY^LOOXPKM^Y\cMKVSL\K^ON0Y\^ROY\SQSXKVMKVSL\K^SYX
^RO _]O\ +NNO\ KXN 7_V^SZVSO\] K\O ]O^ ^Y &( KXN &( KXN Z\S`SVOQON PKM^Y\c
MYWWKXN]K\O_]ONPY\MKVSL\K^SYXKNT_]^WOX^
5.4.2 ADJUSTING ANALOG MEASUREMENT CHANNELS
m
OPERATION
To view or edit the analog measurement channel modifiers, first select the range you wish
to modify using the ANALOG function (see Section 3.2.9).
Then, from the main run screen press [SPECIAL] and select <4Internal>,
<2Cal>,
<3analog>. Specify the desired analog channel. The values of the adder and
multiplier can then be edited.
+] ONS^SXQ KNNO\ KXN W_V^SZVSO\ `KV_O] aSVV MRKXQO ^RO MKVSL\K^SYX YP ^RO KXKVYQ SXZ_^
WOK]_\OWOX^] ^ROc ]RY_VN YXVc LO ONS^ON Lc [_KVSPSON ZO\]YXXOV K] ZK\^ YP ^RO
MKVSL\K^SYXZ\YMO]] -K_^SYX ]RY_VN LO ^KUOX ^Y K`YSN KMMSNOX^KV ONS^SXQ ]OO
=OM^SYX