Agilent Technologies FRG-700, Short Operating Instructions

Page: 11 / 36

Inverted Magnetron Pirani Gauge FRG-700 FRG-702
11
Supply
DANGER
The gauge may only be connected to power sup-
plies, instruments or control devices that conform
to the requirements of a grounded protective extra-
low voltage (SELV). The connection to the gauge
has to be fused
1)
.
Voltage at the gauge 15
… 30 VDC
(ripple

1 V
pp
)
Power consumption

2 W
Fuse
1)

1 AT
Voltage at the supply unit with
maximum cable length 16
… 30 VDC
(ripple

1 V
pp
)
2)
Adjustment
Potentiometer <HV>
Potentiometer <ATM>
adjustment under 10
-4
mbar
adjustment at atmospheric
pressure
Electrical connection FCC68 socket, 8-pin
Sensor cable 8-pin, shielded
Line length

50 m (8

0.14 mm²)
Operating voltage

3.3 kV
Operating current

500 µA
Grounding concept

"Electrical Connection"
Vacuum connection
–measuring
common
connected via 10 k

(max.
voltage differential with
respect to safety ±50 V
accuracy ±10 V)
Supply common
– signal common conducted separately
1)
Agilent controllers fulfill this requirement.
2)
The minimum voltage of the power supply unit must be increased
proportionally to the length of the sensor cable.