Section 1
INTRODUCTION AND DESCRIPTION
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GENERAL
Varian’s senTorr Gauge Controller is a complete, half-rack vacuum gauge controller that offers contin-
uous, reliable pressure measurement from rough to high vacuum. The controller comes completely
configured from the factory to operate one of six gauge tube configurations.
UHV2c
Two convectorrs and one UHV type HFIG
BA2
Two Thermocouples and one Bayard-Alpert gauge tube
BA2c
Two ConvecTorrs and one Bayard-Alpert gauge tube
CC2
Two Thermocouples and one Cold Cathode gauge tube
CC2c
Two ConvecTorrs and one cold cathode gauge tube
BA
One Bayard-Alpert gauge tube
CC
One Cold Cathode gauge tube
The senTorr Gauge Controller features one digital display per gauge tube. The displays are LED-driven
providing clear and sharp pressure readings. The front panel keypad has practical lockout features that
protect against unauthorized parameter inputs. Analog outputs and remote capabilities are located on
the back panel. The external remote input controls turnon or turnoff of high-vacuum gauge emission.
Options include set points and RS232 or RS485/422 communication ability. Resistive (I
2
R) degas is an
option on Bayard-Alpert models, E-beam degas on the UHV models. The set point option includes four
set points, one for each gauge tube plus an additional set point that can be assigned to any one of the
three gauge tubes.
The senTorr offers an extraordinary amount of gauging and programming capability while still remain-
ing easy to use. The operator can access all of the instrument's functions and parameters through the
front panel keypad or the optional serial link.
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SPECIFICATIONS
Power Requirements
90 to 127 VAC, 50/60 HZ
208 to 250 VAC, 50/60 HZ
The senTorr is fitted with an internal switch to accommodate the desired power input.
Operating Temperature
0 to 50°C
The senTorr meets all performance specifications (unless otherwise noted) at 25°C (+ 5°C) at 90 per-
cent relative humidity, non-condensing.
Data Retention
The senTorr will retain its parameter values, upon power down or a power
failure, for a period of four years accumulated off-time.
Size
Half-rack mount, 3.5" high by 8.0" wide by 15" deep
Optional rack-mounting kits are available for mounting one or two units in a standard 19-inch rack.
Cabling
The senTorr basic unit includes a 6-foot power cord and fuse set. Gauge
cabling is available separately. Standard gauge cable lengths are 10, 25,
50, 75, and 100 feet. Longer cables (up to 500 feet) are available by special
order. All cable connections are made at the rear of the unit.
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