Hastings CVT-14/24 Instruction Manual Download Page 15

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page 15

3.7.2 Calibration Using A Hastings Reference Tube

Connect a Hastings reference tube to a stabilized vacuum gauge. Wait until the displayed pressure

is stable.

NOTE:

The following table specifies the Hastings reference tube to be used in the calibration of a

gauge based upon the type of gauge tube being used:

Reference tube

Gauge tube

DB-16D

DV-4

DB-18

DV-5

DB-20

DV-6

Adjust the gauge CAL control (figure 3.2) until the meter pointer indicates the pressure specified

on the decal of the reference tube in use.

figure 3.2; VT/CVT calibration points

Summary of Contents for CVT-14/24

Page 1: ...page 1 VT CVT SERIES VACUUM GAUGES and CONTROLLERS HASTINGS INSTRUCTION MANUAL ...

Page 2: ...mportant change information that the user should incorporate immediately into the manual Addenda are numbered sequentially When a new revision is created all addenda associated with the previous revision of the manual are incorporated into the new revision of the manual Each new revision includes a revised copy of this print history page RevisionA Document Number 146 0497 April 1997 Revision B Doc...

Page 3: ...1 Meter Mechanical Zero 13 3 2 AC Input Power 13 3 3 Pressure Measurement 13 3 4 Controller Set Points 13 3 5 OperationAnd Performance Check 13 3 6 GaugeTube Operating Principle 14 3 7 Calibration 14 3 7 1 Calibration Using AVacuum System 14 3 7 2 Calibration UsingA Hastings ReferenceTube 14 4 0 WARRANTY and REPAIR 17 4 1 Warranty Repair 17 4 2 Non warranty Repair 17 Hastings Instruments reserves ...

Page 4: ...page 4 ...

Page 5: ... but sensitive gauge tubes which are designed specifically for each of the three available pressure ranges consult Hastings Ordering and Dimension guide 1 2 Specifications Pressure range VT 4 series CVT 14 24 0 20Torr or 0 20 mbar VT 5 CVT 15 25 0 100 mTorr or 0 0 1 mbar VT 6series CVT 16 26 0 1000 mTorr or 0 1 mbar Input power 115 or 230 VAC 50 60 Hz Output signal 0 1VDC analog non linear Control...

Page 6: ...page 6 ...

Page 7: ...es units to be used when considering mounting locations Use dimensional drawing figure 2 3 to cut out and drill the gauge controller mounting panel Install gauge or controller onto panel using hardware supplied with your unit SECTION 2 Installation figure 2 1 VT series outline dimensions figure 2 2 CVT series outline dimensions ...

Page 8: ...ctions that will allow the user to display pressure from one or more selected tubes No special installation is necessary simply connect the power cord and the gauge tube cables Note All of the gauge tube cables on either a 2 position or a 5 position unit must be equal in length Mixing cable lengths on a particular unit will produce a calibration error due to the different resistances of the cables...

Page 9: ...als T erminal Function Description 3 Gauge tube cable HTDT C blk wire 4 AC power cable 115VAC blk wire 5 Gauge tube cable HTDT C wht wire 6 Gauge tube cable COMPT C green wire 7 Analog output negative analog output terminal 8 Analog output positive analog output terminal 9 AC power cable LoVAC wht wire 10 AC power cable 230VAC blk wire 13 COM chassis ground 14 COM AC power ground green yellow wire...

Page 10: ...auge tube cable COMPT C green wire 7 Analog output negative analog output terminal 8 Analog output positive analog output terminal 9 AC power cable LoVAC whtWIRE 10 AC power cable 230VAC blkWIRE 11 Spare no connection 12 Lo set relay COM relay contact 13 COM chassis ground 14 COM AC power ground green yellow wire 15 Hi set relay N C relay contact 16 Hi set relay N O relay contact 17 Hi set relay C...

Page 11: ... calibration or performance The recommended orientation is with the tube vertical and its stem down This will aide in preventing condensable materials from remaining in the gauge tube Hastings instruments also offers a wide variety of installation accessories for use with your vacuum gauge tube Please consult the Hastings Ordering and Dimension Guide or contact your factory representative for info...

Page 12: ...page 12 ...

Page 13: ...b controls the HI Set pressure Relay K2 Control logic determines that a relay will energize when the indicated pressure is lower than the set pressure and de energize when the indicated pressure is higher than the set pressure or if their is a loss of AC power to the unit 3 5 Operation And Performance Check All Hastings vacuum gauges controllers and tubes have been carefully calibrated and checked...

Page 14: ...e less than 1 0 x10 2 Torr When using DV 5 or DV 6 type gauge tubes system pressure must be less than 1 0 x 10 5 Torr Adjust the gauge CAL adjustment figure 3 2 until the meter pointer indicates zero left on the dial face 3 6 GaugeTube Operating Principle Operation of the Hastings gauge tube is based on a low voltage AC bridge that heats a noble metal thermopile A change in pressure in the gauge t...

Page 15: ...ollowing table specifies the Hastings reference tube to be used in the calibration of a gauge based upon the type of gauge tube being used Reference tube Gauge tube DB 16D DV 4 DB 18 DV 5 DB 20 DV 6 Adjust the gauge CAL control figure 3 2 until the meter pointer indicates the pressure specified on the decal of the reference tube in use figure 3 2 VT CVT calibration points ...

Page 16: ...page 16 Maintainance and Repair 4 3 ...

Page 17: ...aith that it is defective in materials or workmanship during the warranty period Defective instruments should be returned to Hastings Instruments together with a written statement of the problem and a Return MaterialAuthorization RMA number Please consult the factory for your RMA number before returning any product for repair 4 2 Non Warranty Repair Policy Any product returned for a non warranty r...

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