NOTES:
1. The zero adjustment can be used as a
tare offset by adjusting the display to the
required tare value. The maximum zero
offset is approximately ± 16 psi.
2. Rather than convert the millitorr vac-
uum gauge reading to the current engi-
neering units for setting zero, the current
units can be changed to MICRON HG @
0C or MTORR in the METRIC menu. Then
enter the millitorr reading to set zero, and
then change back to the normal engineer-
ing units for setting the span later.
Setting the Sensor Span
Apply a known absolute pressure equal to or near
the span of the sensor. Do not attempt to set span
while at or near zero.
From the keypad, push [2nd], [CAL], [+], [=] enter
password [=] [=]. At the SENSOR SPAN prompt,
type in the true pressure and then [=] to enter the
reading. The range of span adjustment available is
± 0.1% of the transducer full scale value. Press
[CE]. The display should now indicate the new true
pressure.
From the GPIB, send the command ‘_PCS4 CAL
SPAN value‘, where value is the true pressure
applied to the sensor. The recalibration is now
complete.
CALIBRATION PCS 400
6-4 www.mensor.com
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