Setra System Model Datum 2000 - Manual (Page 20)

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Step 7b.
Press the HOLD/mode key to accept the decimal point and the meter will
display the decimal point with zeroes.
Step 8.
Enter a calibration data point. (Enter a number between +31999 and -9999.)
Note: The pressure or voltage/current must be applied to the appropriate
channel before entering this data point.
Caution: Do not try to calibrate Channel One of the DATUM 2000™
Manometer with a voltage input, this will damage the unit and void the
warranty. Never apply a voltage signal to the Channel One inputs (see
page 14).
Press the SCAN/adj key to move the numbers up (+).
Press the HOLD/mode key to move the numbers down (-).
When the desired number is reached, press the SCAN/adj and HOLD/mode
keys at the same time. The number will flash repeatedly. Then, press the
SCAN/adj key to readjust the number or the HOLD/mode key to accept it.
After the calibration data point has been accepted, the meter will display
“bUSY” for 10 seconds and then display zero. The second data point may
be entered.
**Set up wiring for second calibration point. The meter is programmed to
allow unlimited time for this wiring. It will not default to normal operating
mode. If using the internal reference voltage, the -IN and ground should be
shorted, pin 7 and pin 9 (CH2: pin 13 and 15). The reference voltage (either
contact of the 2 pin blue connector located behind the terminal strip) should
be connected to the +IN, pin 6 (CH2: pin 12).
SCAN HOLD
adj mode
S.E7dP 0.000
SCAN HOLD
adj mode
30.000 0.000
SCAN HOLD
adj mode
—0.100 0.000