Teledyne HASTINGS 4/6, Manual, Page: 3 / 10

148-0598 Rev. A Page 3 May 1998
1.0 GENERAL
INFORMATION
The MODEL 4/6 is a ¼ DIN, panel
mount, digital vacuum indicator and
power supply for use with the Hastings
AVC module and either the DV-4D or
DV-6M gauge tube. It comes complete
with mating connectors and an ac line
cord. Users can easily select between the
two operating ranges, 0.01 to 20 Torr for
the DV-4D or 0.001 to 1.0 Torr for the
DV-6M. (NOTE: The MODEL 4/6 was
formerly called the VD5AVC.)
1.1 FEATURES
• Continuous
operation from
115vac.
•
Direct reading LED digital
display.
•
Can be reset to original factory
calibration without use of vacuum
system or Reference Tube.
•
Custom two-point calibration
using external calibration standard.
•
One point calibration using
Hastings Reference Tube.
•
Selectable units of measure, Torr
or 1 millibar (hPA).
•
Can be used with either Hastings
DV-4 or DV-6 series gauge tubes.
1.2 VACUUM GAUGE TUBE
The Hastings gauge tube is based on a
low voltage AC bridge which heats a
pair of noble metal thermocouples.
A change in pressure in the gauge tube
changes the thermal conductivity of the
gas surrounding the thermocouples, thus
changing the heat loss of the thermo-
couples due to thermal conductivity.
This results in a temperature change in
the thermocouples, thus changing their
dc millivolt output. The dc millivolt
output varies inversely with pressure,
with 10mv equal to a pressure less than
0.001 Torr and between 0 and ½ mv
equal to atmospheric pressure.
A third thermocouple provides
compensation for transient ambient
temperature changes.
1.2.1 DV-4 series Gauge Tube
Range: 0.01 to 20 Torr
Request Product Bulletin 100A for types
of DV-4 tubes that can be used with the
MODEL 4/6 with AVC.
1.2.1 DV-6 series Gauge Tube
Range: 0.001 to 1 Torr
Request Product Bulletin 100A for types
of DV-6 tubes that can be used with the
MODEL 4/6 with AVC.
1.3 ACCESSORIES
1.3.1 Installation Accessories
Request Hastings Product Bulletin 100C
for vacuum hardware available for
simplifing installation of the vacuum
gauge tube.
1.4 SPECIFICATIONS
Pressure Measurement Range:
d-4C < 0.01 Torr = ur (under range)
0.01 to 20 Torr