Setra System Model Datum 2000 - Manual (Page 18)

18
CALIBRATING VOLTAGE INPUT AND CURRENT INPUT
(please read before attempting procedure)
CAL_U and CAL_C commands allow you to calibrate the DATUM 2000™ by
entering two data points. (Calculate the pressure for the 2 calibration points
before beginning this procedure.) The DATUM 2000™ will determine the
conversion factor and display the applied pressure in the desired engineering
units. The maximum read-out is +31999 to -9999.
If unit has been previously calibrated the calibration must be erased before
calibrating the meter. Following this procedure without erasing the previous
calibration will not reprogram the meter.
Note: If at anytime you with to abort the calibration procedure, simply
disconnect power to the unit and the old calibration data will still be intact.
CAUTION: CALIBRATING CHANNEL ONE OF THE DATUM 2000™ MANOMETER WITH A
VOLTAGE INPUT WILL RESULT IN DAMAGE TO THE DATUM AND WILL VOID THE
WARRANTY. THE DATUM 2000™ MANOMETER HAS BEEN CALIBRATED AT THE
FACTORY FOR THE SETRA TRANSDUCER INSTALLED INSIDE. IF YOU WISH TO
PERFORM A CALIBRATION ON THE DATUM 2000™ MANOMETER, YOU MUST APPLY
KNOWN PRESSURE TO THE TRANSDUCER. NEVER APPLY A VOLTAGE SIGNAL TO
THE CHANNEL ONE INPUTS (PINS 6 AND 7) ON THE BACK OF THE DATUM 2000™
MANOMETER.
*Before beginning set up wiring for first calibration point. If using the internal reference voltage,
+IN, -IN and ground should all be shorted together, pin 6, pin 7 and pin 9 (CH2: pin 12, pin 13
and pin 15).
Step 1.
Press and hold the SCAN/adj and HOLD/mode keys for 8 seconds, then
release; the display will alternate between “cal” and “noYes” for ten seconds.
Step 2.
To specify “yes” and select “CH1”, press and hold the HOLD/mode key to
display “CH1” . (To select “CH2”: With “CH1” displayed, press and release
the SCAN/adj key to display “CH2”.)
Step 3.
Press the HOLD/mode key to display “ALAr”.
0.00 CAL
SCAN HOLD
adj mode
SCAN HOLD
adj mode
noYES CH1
CH1
SCAN HOLD
adj mode
ALAr