Field Calibration; Rate Voltage Calibration - DANIEL 2234 Manual

MODEL 2234 DIGITAL FLOW COMPUTER ___________________________
4.3

FIELD CALIBRATION

4.3.1 RATE VOLTAGE CALIBRATION (See Figures 4-1 or 4-2.)
The trimpot in parenthesis refers to the later PC Board No.1
(DE-10421 series).
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NOTE:
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A. Enter Read Code 11 to display the Mass Rate Full Scale in LBHR. Make
a note of this total. "Enable" the computer and enter the total into Read
Code 18 (full scale volume rate in LBHR).
B. Attach a digital voltmeter to terminals 46 (+) and 49 (-) on the rear of the
Model 2234. Adjust span trimpot R23 (R4) on P.C. Board No.1 to a reading
of +10.000 volts. Enter 0.0 into Read Code 18. Adjust zero trimpot R24
(R5) on PC Board No.1 to a reading of 0.00 volts.
Repeat steps A and B until the zero and span are correct without making
further adjustments. "Disable" the computer.
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NOTE:
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SECTION 4
Trimpot R18 on PC Board No.1 (DE-8992 series) and R1 on
PC Board No.1 (DE-10421 series) are factory adjustments only.
Do not adjust.
Only one rate voltage output requires calibration.
remaining rate voltage outputs are calibrated automatically.
The
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