Agilent Technologies TwisTorr 305 FS User Manual page 190

Technical Information
When in programmable analog signal you read a voltage below the voltage range
(in above table) it means "Error Over range", if you read a voltage below the voltage
range it means "Error Under range" (in these cases you can read the manual of the
gauge for further details).
With the serial communication you can use the following windows:
Win 224
Win 257
Win 267 Gauge power (read/write):
If you need to turn off the gauge at certain condition you can use this window
The windows from 136 to 140 manage an additional set point (set point 3)
dedicated to turn ON or OFF the gauge (win 267=4).
190
Pressure reading with the format X.X E XX
Gauge status (read only):
0 → when a gauge is not connected
1 → when a gauge is connected
2 → when the pressure read is under range or when
the gauge gives an internal error
3 → when the pressure read is under range or when the gauge
gives an internal error
4 → when the "identification" is present but not known by
the controller
0 → gauge off
1 → gauge on (default)
2 → gauge normally off. It turns on when the set point 1 is
activated. If the set point 1 type (win 101) is selected as "pressure"
the gauge is always on.
3 → gauge normally off. It turns on when the set point 1 is
activated. If the set point 2 type (win 171) is selected as "pressure"
the gauge is always on.
4 → gauge normally off. It turns on when the set point 1 is
activated. If the set point 3 type (win 101) is selected as "pressure"
the gauge is always on.
Agilent TwisTorr 305 FS Remote Controller User Manual