Hastings VT User manual
101B - PAGE 1
TELEDYNE BROWN ENGINEERING
HASTINGS INSTRUMENTS
P.O.BOX 1436
HAMPTON, VIRGINIA 23661 U.S.A.
TELEPHONE (804)723-6531
FAX (804)723-3925
© May 1995
HASTINGS COMPACT
VACUUM CONTROLLERS
VT MODELS
101B - PAGE 2
101B - PAGE 3
TABLE OF CONTENTS
SECTION 1.0 GENERAL INFORMATION ........................................................................................... 5
1.1 Description ........................................................................................................................................ 5
1.2 Operating Principle............................................................................................................................ 5
1.3 Specifications ................................................................................................................................... 5
1.4 Warranty ........................................................................................................................................... 6
1.5 Accessories ...................................................................................................................................... 6
1.6 Selection Chart ................................................................................................................................. 6
SECTION 2.0 GAUGE TUBES AND CABLES ....................................................................................... 8
2.1 Gauge Tubes............................................................................................................................... 8
2.2 Extension Cables ........................................................................................................................ 8
SECTION 3.0 INSTALLATION PROCEDURE ....................................................................................... 10
3.1 Panel Mounting ........................................................................................................................... 10
3.2 Cabinet Models ........................................................................................................................... 10
3.3 Power Switch .............................................................................................................................. 10
3.4 Hastings MultiPosition Switching Capabilities ............................................................................. 10
3.4.1 Multiposition Switching Attachment ......................................................................................... 10
3.4.2 Cabinet Models with Switching................................................................................................. 10
3.5 Gauge Tube Installation .............................................................................................................. 10
SECTION 4.0 OPERATION OF VACUUM GAUGE ................................................................................. 11
SECTION 5.0 CALIBRATION AND TROUBLESHOOTING GUIDE ............................................................ 12
5.1 Check of Tube Accuracy............................................................................................................. 12
5.2 Calibration Procedure for CVT Models 14, 24, 16 and 26............................................................ 12
5.2.1 Calibration of all Models except VT-4A,VT-5A,VT-5AB,VT-5AS2,VT-5AS & VT-6A ................. 12
5.2.2 Calibration of Models VT-4A, VT-5A, VT-5AB, VT-5AS2, VT-5AS & VT-6A ............................. 12
101B - PAGE 4
SECTION 6.0 NOTES ON VACUUM MEASUREMENTS ........................................................................ 14
6.1 Effects of Condensable Vapors ................................................................................................... 14
6.2 Outgassing .................................................................................................................................. 14
6.3 Ingassing..................................................................................................................................... 14
6.4 Effect of Thermal Conductivity.................................................................................................... 14
6.5 Effects of System Conductance ................................................................................................. 14
SECTION 7.0 SERVICE INFORMATION ............................................................................................... 15
7.1 Warranty Repair Policy................................................................................................................ 15
7.2 Non-Warranty Repair Policy ........................................................................................................ 15
7.3 Service Form............................................................................................................................... 17
SECTION 8.0 DRAWINGS AND DIAGRAMS ......................................................................................... 19
8.1 DV-5 Gauge Tube Nomogram .................................................................................................... 20
8.2 DV-6 Gauge Tube Nomogram .................................................................................................... 21
8.3 DV-4D Gauge Tube Nomogram .................................................................................................. 22
8.4 DV-5 & DV-18 Gauge Tubes Nomogram .................................................................................... 23
8.5 DV-6M, DV-6R, DV-20 & DV-36 Gauge Tubes Nomogram ......................................................... 24
8.6 Sulfur Hexaflouride Nomogram................................................................................................... 25
8.7 VT-4B & VT-6B Schematic......................................................................................................... 26
8.8 VT-4S & VT-6S Schematic......................................................................................................... 27
8.9 VT-4 & VT-6 Schematic ............................................................................................................. 28
8.10 VT-4A, VT-5A & VT-6A Schematic .............................................................................................29
8.11 VT-4S2 & VT-6S2 Schematic ..................................................................................................... 30
8.12 VT Outline Dimensions............................................................................................................... 31
8.13 Mounting Dimensions for Units with 503 Meters and VL-2 or VL-5 Switching Attachments ....... 32
8.14 VT Mounting Dimensions (Model VT Vacuum Gauge only) ........................................................ 33
Hastings Instruments reserves the right to change or modify the design of its equipment without any
obligation to provide notification of change or intent to change.
101B - PAGE 5
1.0 GENERAL INFORMATION
This manual contains technical and general information concerning the installation, operation and calibration of Hastings
Compact Vacuum Gauges, VT-Models, and associated components.
For proper operation, Hastings Compact Vacuum Gauges must be suitably connected to a Hastings companion Gauge Tube.
Attempting to use this Vacuum Gauge with any other transducer may damage both the gauge and other transducer.
1.1 Description:
Hastings Compact Vacuum Gauges are self-contained instruments that offer extreme versatility for all vacuum applications. The
electronic design assures long life and minimal maintenance. Compact models are ready for mounting onto a panel. Cabinet
models are also available with or without switching attachments that can monitor 2 or up to 5 stations. The letter "A" in the
model number (i.e. Model VT-5A) designates 0-1 VDC analog output. See SELECTION CHART, page 3, for complete descriptions
and model numbers.
These instruments utilize Hastings rugged but sensitive gauge tubes which are designed specifically for each of the three
available ranges. Tubes are also compensated for temperature and rate of change of temperature.
1.2 Operating Principle:
Operation of the Hastings Vacuum Gauge
is based on a patented low voltage AC
bridge which heats a noble metal
thermopile circuit (Figure 1.1). A change
in pressure in the tube creates a change
in the thermal conductivity of the gas
cooling the thermopile, which in turn
causes a temperature shift of AC
thermocouples A and B. This causes the
DC output from the two thermocouples to
change with pressure.
The DC thermocouple, C, is unheated and
in series with the indicating meter circuit. Ambient temperature variations will develop voltages in all thermocouples; however,
the transient effects in heated and unheated elements are equal and opposite, therefore the unheated couple compensates for
transient temperature changes.
1.3 Specifications:
Range, all VT-4 Models................................................................................ 0-20 millimeters of mercury or 0-20 millibars
Range, all VT-5A Models................................................................................ 0-100 microns of mercury or 0-0.1 millibars
Range, all VT-6 Models....................................................................................... 0-1000 microns mercury or 0-1 millibars
Power .................................................................................................................... 115 VAC, 50/60 hz; 230 VAC optional
Output ....................................................................... VT-4A,VT-5A,&VT-6A Models, 0-1V @ 4 mA (1V @ Hard Vacuum)
Size........................................................................................................................................ See Dimensions, page 21
Cables ...................................................................... 6-foot power cable and 8-foot gauge tube cable (lengths are approx)
Weight ................................................................................................ Approx. 1-1/2 lb., including gauge tube and cable
FIG 1.1
101B - PAGE 6
1.4 Warranty:
Hastings Instruments warrants this product, for a period of one year from the date of shipment, to be free from
defects in material and workmanship.
This warranty does not apply to defects or failure resulting from unauthorized modification, misuse, or mishandling
of the product. This warranty does not apply to fuses, filters, batteries, or other expendable parts, nor to damage
caused by leaking batteries, clogged filters, or similar occurrences.
This warranty is in lieu of all other warranties, expressed or implied, including any implied warranty as to fitness for
a particular use. Hastings Instruments shall not be liable for any indirect or consequential damages. Refer to
Section 7.0 for warranty or other services for this product.
1.5 Accessories:
MULTIPOSITION SWITCHING ATTACHMENTS: For mounting behind panel adjacent to meter. Includes pilot
light, ON-OFF switch, selector switch and 8-foot cable.
(NOTE: Switching attachments are not for use with VT-5A Models.)
Model VL-2: Two-position
Model VL-5: Five-position
KIT 1: Mounting kit for desk or bench use. Includes stand and ON-OFF switch.
KIT 2: Mounting kit for panel or cabinet installation. Includes pilot light and ON-OFF switch.
EXTENSION CABLES: Available in 8-ft., 12-ft., 25-ft., 50-ft., and 100-ft. lengths.
GAUGE TUBE INSTALLATION ACCESSORIES: Quick connects, dropout traps, adapters, and valved quick
connects.
1.6 Selection Chart:
On the following page is a chart showing all VT Vacuum Gauge models, ranges, and compatible gauge tubes.
101B - PAGE 7
COMPACT VACUUM GAUGES
STOCK# MODEL# VACUUM GAUGE RANGE
55-149 VT-4 Compact Model 0-20mm Hg
0-20 mbar
55-150 VT-4B Cabinet Model 0-20mm Hg
0-20 mbar
55-151 VT-4S2 Cabinet Model, 2-Position 0-20mm Hg
0-20 mbar
55-152 VT-4S* Cabinet Model, 5-Position 0-20mm Hg
0-20 mbar
55-129 VT-4A Compact Model, 1VDC 0-20mm Hg
0-20 mbar
55-119 VT-5A Compact Model, 1VDC 0-100µHg
0-.1 mbar
55-109 VT-5AB Cabinet Model, 1VDC 0-100µHg
0-.1 mbar
55-153 VT-6 Compact Model 0-1000µHg
0-1 mbar
55-154 VT-6B Cabinet Model 0-1000µHg
0-1 mbar
55-155 VT-6S2 Cabinet Model, 2-Position 0-1000µHg
0-1 mbar
55-156 VT-6S* Cabinet Model, 5-Position 0-1000µHg
0-1 mbar
55-215 VT-6A Compact Model, 1VDC 0-1000µHgr
0-1 mbar
GAUGE TUBES
STOCK# MODEL# GAUGE TUBE
55-19 DV-4D Std. Metal (purple base)
55-19R DV-4R Ruggedized
55-69 DV-34 Stainless Steel
55-227 DV-4D-VCR Metal w/VCR connector
55-258 DV-4D-KF-16 Metal w/KF-16 connector
55-266 DV-4D-KF-25 Metal w/KF-25 connector
67-6 DV-5M Std. Metal (red base)
55-230 DV-5M-VCR Metal w/VCR connector
55-38 DV-6M Std. Metal (yellow base)
55-139 DV-20 Glass
55-38R DV-6R Ruggedized
55-66 DV-36 Stainless Steel
55-229 DV-6M-VCR Metal w/VCR connector
55-251 DV-6M-KF-16 Metal w/KF-16 connector
55-267 DV-6M-KF-25 Metal w/KF-25 connector
* Starred items require one gauge tube and one cable for each position to be used. Standard metal tubes have
1/8" NPT male thread connection. Glass tubes have 10mm (3/8") OD tubulation.
Stainless tubes require adapter cable type OM-1-MSF.
NOTE: 220 VAC is available as an option. All 220 VAC models have millibar scales. Add prefix "E" to the model
number. EX. Model VT-5A with 220 VAC option becomes Model EVT-5A.
101B - PAGE 8
2.0 GAUGE TUBE AND CABLES
The tube types for each model of the Hastings Compact Vacuum Gauge are listed in Section 1.6 (Selection Chart). Gauge Tube
Installation is described in Section 3.5.
2.1 Gauge Tubes:
Hastings Vacuum Gauge Tubes (with external circuit) form a low voltage AC bridge noble metal thermopile circuit. A change in
pressure in the tube creates a change in thermal conductivity of the gas cooling the thermopile. This causes a change in the
DC output from the thermocouples.
The tubes are to be installed in a 1/8" NPT female thread, or in a Hastings Type OS Quick Connector.
The octal sockets of standard metal tubes are color-coded for easy identification: The DV-4D is purple, the DV-5M is red, and
the DV-6M is yellow.
In addition to standard metal gauge tubes, there is a choice of:
GLASS - Available for high temperature and bakeable systems. 10mm (3/8") O.D. smooth tubulation
RUGGEDIZED - Nickel-plated hermetically sealed base w/monel housing for weather resistance.
STAINLESS STEEL - For weather-proof, corrosive, and bakeable applications. Withstands high overpressurization. Plain or
threaded connection. (requires OM-1-MSF adaptor cable)
VCR CONNECTION - VCR female nut connection. 9/16-18 UNF, female threads w/.75 hex, Cajon #SS-4-VCR-3 and #SS-4-
VCR-1.
ISO-KF CONNECTION - KF-16 or KF-25 with all stainless steel construction (request Product Bulletin #337).
2.2 Extension Cables:
Hastings extension cables are
available in 8, 12, 25, 50, and
100 foot lengths. These cables
are #18 gauge, 3-conductor
cables. The three color-coded
wires (Black, White, Green) are
connected as shown in Figure
2.1.
Each instrument is shipped with
a 6-foot power cable and an 8-
foot gauge tube cable. Exten-
sion gauge tube cables are
available, as shown in the table
on page 5.
Extension gauge tube cables for all VT Models except VT-4S, VT-5AS, and VT-6S:
STOCK # MODEL # DESCRIPTION
55-3 OM-8-OFV 8-foot extension cable
55-22 OM-12-OFV 12-foot extension cable
65-53 OM-25-OFV 25-foot extension cable
65-102 OM-50-OFV 50-foot extension cable
55-142 OM-100-OFV 100-foot extension cable
FIG 2.1
101B - PAGE 9
Extension gauge tube cables for VT-4S, VT-5AS, and VT-6S:
STOCK # MODEL # DESCRIPTION
55-5 CF-8-OFV 8-foot extension cable
65-37 CF-12-OFV 12-foot extension cable
55-23 CF-25-OFV 25-foot extension cable
55-47 CF-50-OFV 50-foot extension cable
65-47 CF-100-OFV 100-foot extension cable
101B - PAGE 10
3.0 INSTALLATION
3.1 Panel Mounting:
An outline drawing detailing panel cut-out dimensions is provided on page 29. Install the meter on the panel using the
supplied hardware.
3.2 Cabinet Models:
Cabinet models (VT-4B, VT-4S2, VT-4S, VT-5AB, VT-6B, VT-6S2, VT-6S) require only installation of gauge tube and
cable as described in the following sections. However, the cover must be removed to perform any necessary
calibration adjustments.
3.3 Power Switch:
If an ON-OFF switch is desired, a switch may be wired into the power cable to provide this function. If both "hot" leads are to
be broken, a double pole single throw switch should be utilized. The power cable may also be cut and wired into any master
switch or circuit breaker on a panel.
CAUTION: If cutting cables, DO NOT interchange power and gauge tube cables.
3.4 Hastings Multiposition Switching Capabilities:
3.4.1 Multiposition Switching Attachment
If a Hastings Panel Kit is utilized, an ON-OFF single pole switch, pilot light, and 8-foot cables are included with a 2 or
5 position (Model VL-2 or VL-5) selector switch which can monitor 2 or up to 5 stations.
3.4.2 Cabinet Models With Switching
Cabinet model vacuum gauges can be obtained with built-in switching arrangements that operate in the same
manner as the multiposition switching attachment. Models include the VT-4S2, VT-4S, VT-6S2, and VT-6S. No installation is
necessary other than that of the power cord and gauge tube.
NOTE: You must order gauge tube cables, type CF-XX-OFV, when using five-position cabinet models.
3.5 Gauge Tube Installation:
Situate the gauge tube in a clean, dry vacuum system with the open end pointing down so as to be self-draining
should any vapors condense in it (see Section 6.0). Screw metal tubes into 1/8" female NPT threads using a suitable
sealant; Teflon tape is recommended, or use Hastings Quick Connect O-ring seals for a vacuum tight installation.
Glass tubes have 10mm (3/8") OD tubulation.
Gauge tube may be operated immediately, but best results will be obtained after the tube has outgassed for approximately 1
hour.
101B - PAGE 11
4.0 OPERATION OF VACUUM GAUGE
1) Plug the 6-foot power cable into any single 115V phase AC line. Line frequency is unimportant and 50, 60 or 400 cycle
power will provide satisfactory operation. A 3-wire grounded power cord is supplied with all gauges, including the European
230V models (prefix "E" added to the model number denotes 230V, i.e. EVT-4). Where applicable, turn the ON-OFF switch to
"ON". Allow several minutes for warm-up.
NOTE: VT-4A, 5A, and 6A Models require 115 VAC; EVT-4A, 5A, and 6A Models require 230 VAC, 50-60 cycle, single
phase supply voltage.
2) With the gauge tube unplugged, set the mechanical zero to indicate the center dot past "ATM" for all VT-6 models (see Fig.
5.1, page 9).
3) Plug gauge cable onto gauge tube, and meter should indicate "ATM". If a calibration check is desired, follow the directions
in Section 5.2.1 or 5.2.2, whichever is applicable.
4) Gauge can now be operated with a vacuum tube that has been installed as detailed in Section 3.5.
101B - PAGE 12
5.0 CALIBRATION AND TROUBLESHOOTING GUIDE
All Hastings Vacuum Gauges and Gauge Tubes have been carefully checked and calibrated at the factory before
shipment. If a calibration check is desired, the methods in the following sections may prove helpful.
5.1 Check Of Tube Accuracy:
The simplest and quickest method of checking operation and calibration of a gauge tube is to keep a new spare clean
gauge tube on hand as a "standard". To check operation, install both new and old gauge tubes together in the same clean, dry
vacuum system, and pump until a steady pressure is obtained. Plug the gauge onto both tubes alternately and check readings.
If the old tube reads a higher pressure than the new one, this indicates a calibration shift in the old tube which is most
probably the result of tube contamination. Calibration can possibly be restored by gently swishing the tube in a solvent such as
acetone, alcohol, or other non-polluting degreaser. After cleaning, thoroughly dry the tube and degas it before reinstallation in a
vacuum system to avoid system contamination by the solvent. If calibration cannot be restored by this procedure, replace the
old tube with a new gauge tube. The two tubes can track one another within close tolerance, however, the gauge calibration
can still be off. Check the gauge by methods described in Section 5.2.
5.2 Calibration:
5.2.1 Calibration Of All Models EXCEPT VT-4A, VT-5A, VT-5AB, & VT-6A
NOTE: If calibrating a cabinet model, remove top of case.
1) With power off and gauge tube disconnected, set meter mechanical zero to read on the center dot past "ATM" on the meter
scale for VT-4 models, and on the single dot past "ATM" for VT-6 models.
2) Turn on power and allow one hour warm-up for best results.
3) Install the gauge tube into a vacuum system as described in Section 3.5 and allow the tube to pump down to a
hard vacuum pressure (0.1 micron or lower).
4) Connect gauge tube cable onto evacuated new tube, or for quicker results, a compatible Hastings Reference Tube. The
vacuum gauge meter should now indicate approximately zero microns or the pressure marked on the reference tube; if such is
not the case, carefully adjust the CALIBRATION POTENTIOMETER (R-1) control to obtain the correct reading(s). (Looking from
the top of the meter, with the meter face towards you, the CALIBRATION pot access is to the left of the label.)
The instrument is now recalibrated.
5.2.2 Calibration Of Models VT-4A, VT-5A, VT-5AB, and VT-6A
The instruments listed above incorporate an amplifier to produce a voltage output and require four adjustments for a
complete recalibration. The alternate method will usually suffice for quick field checks as other adjustments, once
made, seldom require resetting.
NOTE: If calibrating a cabinet model, remove top of case.
1) With power off and gauge tube disconnected, set meter mechanical zero to single dot, or center dot, on right of
scale.
2) Turn power on, tube disconnected, and set OFFSET ADJUSTMENT (see Fig. 5.1) of amplifier marked "zero" to same dot as
mechanical zero. Allow one hour warm-up for best results.
3a) Pump gauge tube to hard vacuum (1 decade lower than first division on scale, i.e. pump DV-6 to .1 Hg or
lower). Connect voltmeter to output terminals. Set CAL ADJUSTMENT (see Fig. 5.1) for 1.00 volts DC.
3b) If meter scale does not read ZERO PRESSURE, remove the "DO NOT DISTURB" decal and set meter span to read ZERO
PRESSURE (see Fig. 5.1).
The instrument is now recalibrated.
101B - PAGE 13
Alternate Method:
REFER TO FIG. 5.1. If calibrating a cabinet model, remove top of case.
1) Check mechanical zero and OFFSET ADJUSTMENT, per Section 5.2.2, steps 1 and 2, on the previous page.
2) Plug in a Hastings Reference Tube for the instrument you have and apply power. Allow one hour warm-up for best results.
3) Adjust the CAL ADJUSTMENT until the meter reads the pressure marked on the reference tube.
Fig. 5.1
101B - PAGE 14
6.0 NOTES ON VACUUM MEASUREMENTS
6.1 Effects of Condensable Vapors:
If the readings of Hastings Vacuum Gauges are to be compared with readings of other types of gauges, consider-
ation must be given to the possible effects of condensable vapors on the other gauges. For example, none of the
many types of the McLeod Gauge give correct readings if condensable vapors such as water, alcohol, acetone, etc.,
are present in the gauge. The McLeod Gauge operates by compressing residual gases and vapors to obtain a
reading, and this compression will tend to condense any vapors that are present. This usually results in the McLeod
Gauge reading a pressure that is too low. Furthermore, two different types of McLeod Gauges may disagree and both
be incorrect, if vapors are present. Unlike the McLeod Gauge, the Hastings thermopile vacuum gauges have the very
useful property of responding to the total pressure of all gases and vapors that are present in the gauge tube.
To exclude vapors from the McLeod type of gauge, it is necessary to employ a trap of some kind that will absorb or
condense the vapors. Water vapor is by far the most common source of this difficulty. A trap cooled by liquid
nitrogen is effective in removing vapors, but even so it may be necessary to keep the McLeod Gauge constantly
under vacuum for several hours, or days, with a trap before it will read correctly. Reference should be made to the
instructions furnished by the manufacturer of the McLeod Gauge to be sure that it is provided with a suitable trap.
6.2 Outgassing:
Hastings Gauge Tubes are made of materials that have been proven by years of usage to be relatively free from outgassing.
However, all surfaces of glass and metal that are exposed to the vacuum system may liberate gases and vapors that were
previously absorbed during exposure to the atmosphere. If the surfaces are contaminated with foreign matter, this outgassing
may be much more persistent than if the surfaces are clean. The possibility of outgassing must be considered in checking the
accuracy of Hastings Gauges or in checking for leaks. This is especially important when working with pressure of less than 10
microns of mercury (or .01 millibars). In this range of pressure, outgassing from surfaces in a newly evacuated system may
flood the enclosure. Also, if the system is being pumped continuously, gauges spaced at different distances from the pump
will register different pressures. For reliable comparison of different vacuum gauges, it is necessary then to insure that the
vacuum system be free of any outgassing or other sources of apparent leaks. This can best be determined by closing the
system off from the pumps and observing if there is any rise in pressure within the range of interest.
6.3 Ingassing:
Ingassing is an effect opposite to outgassing and this can also lead to erroneous readings. Ionization gauges exhibit
a kind of pumping action that tends to clean up residual gases in certain ranges of pressure and thereby lowering the
pressure. Also, if a cold trap is in a closed system, the total pressure may change considerably while condensable
vapors such as water, carbon dioxide and mercury are being condensed.
6.4 Effect of Thermal Conductivity:
All Hastings Vacuum Gauges are originally calibrated in dry air. Since this calibration is a function of thermal
conductivity, any gas having a thermal conductivity different from that of air will also have a different calibration.
Nomograms are provided in Section 8.0 to correct indicated pressures to actual pressures for several of the more
common gases encountered in vacuum work.
6.5 Effect of System Conductance:
Each element that makes up a vacuum system has associated with it a certain conductance (this is the opposite of
resistance). For example, baffles, connecting tubing, and sharp turns can all cause pressure drops throughout the
system during pumping and during the time the system is reaching static equilibrium. It is not an uncommon
occurrence to measure different pressures at different locations in a vacuum system. In checking the calibration of
any vacuum gauge, care must be taken to insure that the gauge and the reference are at the same pressure.
101B - PAGE 15
7.0 SERVICE INFORMATION
Under normal operation and excluding the calibration procedure described in Section 5.0, Hastings Model VT Vacuum Gauges
do not require maintenance or adjustment. In the event that a Hastings Vacuum Gauge fails or is otherwise damaged, it should
be returned to the factory for repair.
7.1 Warranty Repair Policy:
Hastings Instruments will repair or replace, at their option, any product covered under the warranty expressed in Section 1.4,
that is returned transportation prepaid to their plant in Hampton, Virginia. All products returned must be accompanied by the
Service Request information form on page 13 or a written description of the problem. Please contact the factory for a Repair
Authorization Number before returning any product for repair.
7.2 Non-Warranty Policy:
Any vacuum product returned for non-warranty repair must be accompanied with a purchase order authorizing
repair up to 1/3 the list cost of a new product and the Service Request information form on page 13. If the repair cost is
higher, you will be contacted for authorization before we proceed. If you then choose not to have the product repaired, you will
be charged for processing and inspection. Please contact the factory for a Repair Authorization Number before returning the
product for repair.
TBE/HASTINGS INSTRUMENTS TELEPHONE(804)723-6531
804NEWCOMBE AVENUE FAX(804)723-3925
HAMPTON, VIRGINIA 23669
ATTENTION: REPAIR DEPARTMENT
101B - PAGE 16
101B - PAGE 17
7.3 Service Form:
TBE / Hastings Instruments RMA#
804 Newcombe Avenue (contact factory)
Hampton, VA 23669 U.S.A.
Telephone (804)723-6531 Fax (804)723-3925
Model No. Serial No. P.O. No. Date
Name Phone
Company
Address
City State Zip
Describe problem:
Show a block diagram of your system including unit inlet and outlet pressures:
Calibration range Gas Cable length
Power line voltage Variation
Ambiant temperature Gas Temperature
Other
(If special modifications have been made by user, please describe):
Application of product being returned
Has this product been used with a hazardous material? YES NO
If YES, please list types of gas, chemicals (common names, specific chemical), biological materials, or
other potentially harmful materials exposed to the product during its use (attach additional page if
necessary)
PRODUCTS EXPOSED TO RADIOACTIVE MATERIAL CANNOT BE ACCEPTED BY HASTINGS
INSTRUMENTS UNDER ANY CIRCUMSTANCES.
Signature of Hazards Control Officer:
For questions regarding use of the product and materials in contact with it:
Name Phone
101B - PAGE 18
101B - PAGE 19
8.0 DRAWINGS AND DIAGRAMS
This section contains the schematics, parts lists, and overall assembly drawings. If replacement components are desired, they
can be obtained from the factory by referencing the Hastings part number listed.
101B - PAGE 20
This manual suits for next models
27
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