174-082010_Digital AVC Page 6 of 17
1.4.3 Calibration Reference
Tubes
THI Reference Tubes employ the
same metal thermopiles used in all
THI Vacuum Gauge Tubes. The
thermopile is sealed in a glass
capsule that has been evacuated,
baked, out-gassed, 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 reference
gauge tube is accurately calibrated to
precisely simulate a gauge tube at a
given operating pressure. It provides
quick and easy instrument re-
calibration by merely plugging the
instrument and, in the case of the
DAVC, adjusting the HTR
potentiometer until the display reads
the exact pressure noted on the
reference tube.
Vacuum Gauge Tubes 1000 mTorr Range
Stock # Model # Description
55-38 DV-6M 1/8” NPT Standard (Yellow base)
55-38R DV-6R 1/8” Ruggedized
55-38RS DV-6 1/8” NPT Rohs Rugged
55-38S DV-6S 1/8” NPT Rugged/Vibration
55-251 DV-6-KF-16 KF-16
TM
55-267 DV-6-KF-25 KF-25
TM
55-283 DV-6-VCR VCR
TM
55-38R-CF DV-6R-CF Mini Conflat
TM
Extension Cables for VT Series (DAVC)
55-3 OM-8-OFV 8 Ft Extension Cable
55-22 OM-12-OFV 12 Ft Extension Cable
65-53 OM-25-OFV 25 Ft Extension Cable
65-102 OM-50-OFV 50 Ft Extension Cable
55-142 OM-100-OFV 100 Ft Extension Cable
Vacuum Gauge Tubes 20Torr Range
55-19 DV-4D 1/8” NPT (Purple Base)
55-19R DV-4R 1/8” NPT Ruggedized
55-258 DV-4D-KF-16 KF-16
TM
55-266 DV-4D-KF-25 KF-25
TM
55-227 DV-4D-VCR VCR
TM
Vacuum Gauge Tubes 100 mTorr Range
55-19 DV-5M 1/8” NPT (Red Base)
55-230 DV-5M -VCR VCR
TM
Reference Tubes for use with DAVC
55-104 DB-20 Ref Tube (DV-6) for DAVC-6 Calibration
55-101 DB-16D Ref Tube (DV-4D) for DAVC-4 Calibration
55-103 DB-18 Ref Tube (DV-5) for DAVC-5 Calibration
