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1.0 GENERAL INFORMATION
This manual contains technical and general information concerning the installation, operation and calibration of the Hastings
HVC-282 Vacuum Gauge, and associated components.
For proper operation, the Hastings HVC-282 Vacuum Gauge must be suitably connected to a Hastings Model DV-273 Gauge
Tube. Attempting to use this Vacuum Gauge with any other transducer may damage the gauge and or transducer.
1.1 Description:
The HVC-282 vacuum instrument offers a digital readout of 0-20 Torr with 0.01 Torr resolution with two adjustable set point
relays, using a international input power supply for 115/220VAC 50/60Hz operation depending on internal switch configura-
tion (Please see Sec. 4.0), all in a standard Hastings VT Gauge unit. The DV-273 Hastings gauge tube is rugged but
sensitive, specifically made for this range, and matched for interchangeability without recalibration giving extra versatility for
all vacuum applications. Tubes are temperature compensated, but do respond to large ∆T transients, requiring insulating
tubes to reduce temperature transients.
1.2 Operating Principle:
Operation of the HVC-282 Vacuum Gauge is based on a low voltage DC bridge which heats a noble metal thermopile. A
change in pressure creates a change in the thermal conductivity of gas surrounding the thermopile, thus at vacuum, little
power is used to heat the thermopile and at full scale requires maximum power. Power level is indicative of vacuum level
present in tube.
1.3 Specifications:
Range/ Resolution .................................................................................................................. 0-20 Torr/0.01 Torr
Readout ......................................................................................................................... 3 1/2 digit LCD display.
Linear Output .................................................................................. 0-2VDC ±5% & 3mV with fine span adjustment.
Set Points ..................................................0- 20 Torr/0.01 Torr, stability of ±3 counts over 0
0
to 50
0
Coperational range.
Accuracy ...................................................................... ±5% of reading & ±3 counts. Gauge tube must be protected
from large temperature transients. (See 3.2)
Repeatability ................................................................. ±1% of reading & ±3 counts. Gauge tube must be protected
from large temperature transients. (See 3.2)
Power Requirements ................................................. 115VAC ±15V or 220VAC ±30V (Selectable) 50/60Hz <4 watts.