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174-082010_Digital AVC
 
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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