Agilent Technologies TwisTorr 74FS AG Rack Mode D'emploi page 225

The controller gives the error "gauge error" if the gauge connected is
not supported. The pressure can be read via display, serial line (win.
224) or REMOTE I/O on Programmable Analog Out.
If the Programmable Analog Output is configured to show the
pressure read by an external gauge, the controller doesn‟t
replicate exactly the signal coming from the gauge; it converts
the gauge signal in the range from 0 to 10V.
The conversion formula is the following:
V
out
Where:
is the gauge output voltage;
V
g
V
out
V
g_min
values can be drawn from the gauge technical specifications).
Figure 23
TwisTorr 74FS AG Rack Controller User Manual / 87-901-055-01
−
V V
= ×
g g _ min
10
−
V V
g _ max g _ min
is the Analog Output voltage;
is the gauge voltage measuring range (these
V
÷
g_max
+25VDC P MAX 2W
SIGNAL
Gauge Connector
Technical Information
Programmable Analog Output Diagrams
J5
GAUGE
IDENTIFICATION
SIGNAL COMMON
COMMON
17
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