Applications
Processes Requiring Accurate Vacuum Measurement & Control:
Glove Boxes
Cryogenics
Vacuum Furnaces
Pharmaceutical Production
Freeze Drying
Agricultural Processes
Air Conditioning
Thermal Food Containers
Plasma Coating
Refrigeration (HVAC)
Accelerators
Appliance Manufacturing
Features
0-100 mTorr, 0-1000 mTorr, 0-20
Torr
Fail Safe: Loss of Power = Loss
of Vacuum
Contactless Optical Meter-Relays
Optional Single or Double Control
Points
Optional Instrument Configurations
and Sensor Fittings
Complete Installation and Calibration
Accessories
Design
Features
Hastings VT-Series Vacuum Gauges are the original models that have generated
repeat customers for over 50 years. Their reputation is built upon exceptional
stability, accuracy, and reliability under the most demanding conditions.
VT-Series Vacuum Gauges are available in three standard ranges: 0-100 mTorr,
0-1000 mTorr, and 0-20 Torr. A self-contained gauge circuit is attached
to the rear of the direct reading meter. All VT-Series Vacuum Gauges feature
long life and minimal maintenance.
These instruments utilize Hastings rugged but sensitive noble metal TC gauge
tubes that are designed specifically for each range. Tubes are matched and
interchangeable without calibration adjustments. They are compensated for
temperature and rate of temperature change and are corrosion-resistant.
Vacuum
Controllers
Hastings Vacuum Controllers, CVT series are fully automatic, continuous-reading
instruments for unlimited vacuum applications. These controllers offer contactless
optical pickups operating in the same standard ranges as the VT meters with
the addition of single or double user selectable control limits. The control
points are durable 5 amp single pole double throw relays which can be configured
normally open or normally closed.
Installation
Accessories
Hastings Instruments offers a complete line of system attachments that permits
easy maintenance for contaminated operations. Gauge tubes are offered with
various system fittings to match almost any system requirement. Additionally,
Hastings’ complete line of quick disconnect attachments allows customers
to install these special fittings and easily replace sensors without vacuum
sealant or Teflon® tape. For particularly dirty systems,
Hastings offers a particle drop-out trap containing a series of nine separate
baffles which prevent solid contaminants from having a direct path to the
sensors thermopile.
Calibration
Reference Tubes
Hastings Reference Tubes employ the same Hastings noble metal thermopile
used in all Hastings Vacuum Gauge Tubes. The thermopile is sealed in a glass
capsule that has been evacuated, baked, outgassed, and then aged to ensure
long-term stability. The sealed capsule is then housed in a protective metal
shell to provide a rugged, trouble-free assembly. Once assembled, the gauge
tube is accurately calibrated to precisely simulate a gauge tube at a given
operating pressure. It permits quick and easy instrument recalibration by
merely plugging the instrument and adjusting the calibration “current
set” potentiometer until the indicator reads the exact pressure noted
on the reference tube. IMPORTANT NOTE: These reference tubes are designed
specifically for use with instruments employing Hastings circuitry and are
NOT interchangeable with instruments using other circuitry.
Specifications
Power
E Option
115 VAC, 50/60 Hz
230 VAC, 50/60 Hz
Cables (approx.)
6-ft power cable and 8-ft. sensor
cable attached.
Weight (approx.)
5 lb max (3.3 kg)
(varies by model)
Relays (CVT units)
5 A SPDT @ 115 VAC non inductive.
Normally open and normally closed.
DIMENSIONS (Reference
only)
VT
VT-A
CVT
CVT 15 & 25 A
VT-B
4.68" W x 4.25" H x 2.25"
D (11.89 x 10.80 x 5.72 cm)
4.68" W x 4.25" H x 4.00" D (11.89 x 10.80 x 10.16
cm)
4.68" W x 4.25" H x 6.00" D (11.89 x 10.80 x 15.20
cm)
4.68" W x 4.25" H x 8.00" D (11.89 x 10.80 x 20.31
cm)
7.62" W x 5.50" H x 4.50" D (19.35 x 13.97 x 11.43
cm)
STANDARD METAL
GAUGE TUBE
Overpressure
30 psig max.
Material of Construction
Nickel-plated steel,
stainless steel, glass, noble metal thermocouples.
Std. Connection
1/8-in. NPT male thread
Max Temperature
100 °C
Tube Leak Test
10 -8 SCCS
OTHER GAUGE TUBES
Glass
Available for high temperature bakeable
systems 3/8 in. O.D. (10 mm) smooth tubulation.
Ruggedised
Monel ®
, nickel-plated steel, glass, noble metal thermocouples.
Stainless Steel
For weather-proof, corrosive, and
bakeable applications. Plain or threaded connection.
