Chemglass AF-0304 - Manual (Page 15)

4.4. Analog Output Signal
Vacuum gauges are shipped with a removable connector
for analog output plugged into the rear panel of the instru-
ment. Follow the steps below to wire the connector for
output to remote recorders, dataloggers, etc.
1. Unplug the gray connector from the rear panel.
2. Unscrew the gray plastic connector cover.
3. Feed your analog output wires through this cover.
4. Solder the positive wire to the center terminal.
5. Solder common or negative wire to the outer terminal.
6. Reinstall the connector cover and plug into the gauge.
The output signal is zero at hard vacuum (10 -4 Torr or
lower) and increases to 2.000 volts @ 2000 mTorr; or
2.000 volts @ 20.00 Torr; or 1.000 volt @ 100 mTorr,
depending on the specific range of the instrument.
The signal continues to increase above this level but it is
not linear and is not intended for use by the customer
above 2.000 volts for the 2000 mT and 20 Torr instru-
ments, or above 1 volt for the 100 mTorr instruments.
Since volts and pressure units are scaled together, this
signal is pre-calibrated at 1 mTorr=1mV, from 1 to 2000
mTorr. Output load should be 2000 ohms or higher.
Rear Panel of Digital Instruments
Unplug the gray plastic
connector from the
instrument
Center terminal is positive
Outer terminal is common
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