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Instruction Manual
Introduction / General Information
Description
The VGC-301 vacuum gauge controller is a convenient and
inexpensive power supply and readout instrument for a CVG
"Worker Bee" convection vacuum gauge. The 1/8-DIN
housing can be used on the bench top or mounted in a cutout
in an instrument panel. The VGC-301 is powered by 12-30
VDC, or by its self-contained universal 100-240VAC supply.
Specifications
measurement range
resolution
display
display engineering units
display update rate
weight
operating temperature
storage temperature
humidity
analog output (user-selectable)
digital interface
housing
input power
setpoint relays
contact rating
trippoint range
adjustment
connectors
RF/EMI protection
Options & Accessories
Gauge Cable - Connects VGC-301 to InstruTech CVG-101 Worker Bee or Helix/GP 275 Convectron
10 ft (3m)
20 ft (6m)
50 ft (15m)
custom lengths over 50 ft (15m), up to 100 ft ( 30 m)
Connector Kit - One set of mating connectors is included with the VGC-301: one
AC Cord , one 6-pin pluggable terminal strip connector, and one 2-pin pluggable terminal
strip connector. (Does not include gauge cable connector - part of cable above.)
order a spare set of connectors separately ...
InstruTech, Inc
InstruTech VGC-301 Convection Vacuum Gauge Controller
Compatibility: Signals and relay functions are the same
as found on similar convection gauge controllers from
other manufacturers. The VGC-301, CVG gauge, and
gauge cable can be directly interchanged with Granville-
Phillips 375 Controller, 275 Convectron
gauge cable. (Remote interface, relay, and power
connectors are different.)
-4
1x10
to 1000 Torr
-4
1x10
to 1333 mbar
-2
1x10
Pa to 133 kPa
-4
-4
1x10
Torr / 1x10
mbar / 1x10
Four-digit LCD, displays 4 digits from 1100 Torr to 1000 Torr
Torr, mbar, or Pa - user selectable
0.5 sec
250 gm ( 9 oz)
o
0 to +40
C ambient
o
-40 to +70
C
0 to 95% RH non-condensing
a) non-linear S-curve 0.375 to 5.659 Vdc, or
b) linear 0 to 10 Vdc, user scalable (default is 10Vdc = 1 Torr), or
c) log-linear 1 to 8 Vdc, 1V/decade
RS232 and RS485
1/8-DIN panel-mount enclosure (see outline drawing for dimensions)
100-240 Vac, 50/60Hz, universal power supply or 12-30 Vdc
two single-pole double-throw relays (SPDT)
1A at 30 Vdc resistive, or ac non-inductive
-3
1x10
to 1000 Torr
a) adjust value by panel pushbutton up/down keys and display
b) adjust value, direction, and hysteresis by software/interface
gauge: 9-pin D female
analog output and digital interface: 9-pin D male
relay outputs: 6-pin pluggable terminal block
power: universal AC and 2-pin pluggable terminal block DC
CE compliant
-2
Pa
3 digits from 999 Torr to 10.0 mTorr
2 digits from 9.9 mTorr to 1.0 mTorr
1 digit from 0.9 mTorr to 0.1 mTorr
CB 421-1 - xxxF or - yyM
To
®
gauge, and
®
gauge tube
CB 421-1- 10F
CB 421-1- 20F
CB 421-1- 50F
CK-431-xx
page 3
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