14
8.0 Calibrating the DATUM 2000™
(Please read before attempting procedure)
Note: If on power up, the DATUM 2000™ display alternates between "cal" and "no
Yes", it has not been called calibrated at the factory. If the DATUM 2000™ (Channel
1 or 2) displays numbers on power up, one or both channels have been calibrated
at the factory.
Always allow the DATUM 2000™ and the transducers, transmitters, or reference
voltage supplies to warm-up 10 minutes before performing a calibration.
Whenever possible, it is a best to calibrate the DATUM 2000™ at the temperature
expected during operation.
There are 3 ways to calibrate the DATUM 2000™: Applying pressure to a transducer
or transmitter connected to the DATUM 2000™; applying voltage to simulate the
transducer, or current for a transmitter, directly to the DATUM 2000™; or using the
DATUM 2000™'s internal reference voltage. The way you should calibrate your
meter depends on the equipment you have available. If you have a precision current
source, use it to simulate the transmitter's output. If you cannot calibrate your
DATUM 2000™ with the methods above, you can use the internal reference voltage
to calibrate your DATUM 2000™.
CAUTION (DATUM 2000™ MANOMETER ONLY): 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 ON INPUTS (PINS 6 AND 7) ON THE BACK OF THE DATUM 2000™
MANOMETER.
NOTE: THE OUTPUT OF THE SETRA TRANSDUCER INSTALLED IN THE DATUM
2000™ MANOMETER IS AVAILABLE AT THE REAR TERMINAL STRIP ON PINS 6
AND 7 AND MARKED CHANNEL 1 +IN, CHANNEL 1 -IN.
8.1 Calibrating the DATUM 2000™ using known pressures
To calibrate the DATUM 2000™ with known pressures, be sure the DATUM 2000™
and the transducer or transmitter is properly connected as described on pages 4-6.
Following the calibration procedures starting on page 18, enter the known pressure
of the system for the calibration points.
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