Teledyne HASTINGS 4/6 User manual

148-0598 Rev. A Page 1 May 1998
HASTINGS MOD 4/6
DIGITAL
VACUUM INSTRUMENT
TELEDYNE BROWN ENGINEERING
HASTINGS INSTRUMENTS
P. O. Box 1436
Hampton, VA 23661, USA
Telephone [phone]
[phone]
FAX [phone]
May 1998
148-0598 Rev.A

148-0598 Rev. A Page 2 May 1998
TABLE OF CONTENT
_____________________________________________________________________________________
1.0 GENERAL INFORMATION ...........................................................................1
1.1 FEATURES...........................................................................................1
1.2 VACUUM GAUGE TUBE ...................................................................1
1.3 ACCESSORIES.....................................................................................1
1.4 SPECIFICATIONS................................................................................2
1.5 WARRANTY ........................................................................................2
2.0 RECEIVING INSPECTION.............................................................................2
2.1 UNPACKING........................................................................................2
2.2 IDENTIFY.............................................................................................2
3.0 INSTRUMENT SET UP & TUBE INSTALLATION ....................................3
3.1 WIRING ................................................................................................3
3.2 CONFIGURATION...............................................................................3
3.3 INSTALLING VACUUM GAUGE TUBE...........................................4
4.0 OPERATION .....................................................................................................5
4.1 AVC MODULE.....................................................................................5
4.2 TAKING A VACUUM MEASUREMENT ..........................................5
4.3 RESOLUTION OF DIGITAL METER.................................................5
5.0 CALIBRATION.................................................................................................5
5.1 RESTORE FACTORY CALIBRATION..............................................5
5.2 CUSTOM CALIBRATION...................................................................6
5.3 REFERENCE TUBE CALIBRATION .................................................7
6.0 MAINTENANCE...............................................................................................8
7.0 TROUBLE SHOOTING AND REPAIR..........................................................8
7.1 TROUBLE SHOOTING GUIDE ..........................................................8
7.2 WARRANTY REPAIR.........................................................................8
7.3 NON-WARRANTY REPAIR ...............................................................8
7.4 RETURN ADRESS...............................................................................8
8.0 EQUIPMENT RETURN FORM......................................................................9

148-0598 Rev. A Page 3 May 1998
1.0 GENERAL
INFORMATION
The MODEL 4/6 is a ¼ DIN, panel
mount, digital vacuum indicator and
power supply for use with the Hastings
AVC module and either the DV-4D or
DV-6M gauge tube. It comes complete
with mating connectors and an ac line
cord. Users can easily select between the
two operating ranges, 0.01 to 20 Torr for
the DV-4D or 0.001 to 1.0 Torr for the
DV-6M. (NOTE: The MODEL 4/6 was
formerly called the VD5AVC.)
1.1 FEATURES
• Continuous operation from
115vac.
• Direct reading LED digital
display.
• Can be reset to original factory
calibration without use of vacuum
system or Reference Tube.
• Custom two-point calibration
using external calibration standard.
• One point calibration using
Hastings Reference Tube.
• Selectable units of measure, Torr
or 1 millibar (hPA).
• Can be used with either Hastings
DV-4 or DV-6 series gauge tubes.
1.2 VACUUM GAUGE TUBE
The Hastings gauge tube is based on a
low voltage AC bridge which heats a
pair of noble metal thermocouples.
A change in pressure in the gauge tube
changes the thermal conductivity of the
gas surrounding the thermocouples, thus
changing the heat loss of the thermo-
couples due to thermal conductivity.
This results in a temperature change in
the thermocouples, thus changing their
dc millivolt output. The dc millivolt
output varies inversely with pressure,
with 10mv equal to a pressure less than
0.001 Torr and between 0 and ½ mv
equal to atmospheric pressure.
A third thermocouple provides
compensation for transient ambient
temperature changes.
1.2.1 DV-4 series Gauge Tube
Range: 0.01 to 20 Torr
Request Product Bulletin 100A for types
of DV-4 tubes that can be used with the
MODEL 4/6 with AVC.
1.2.1 DV-6 series Gauge Tube
Range: 0.001 to 1 Torr
Request Product Bulletin 100A for types
of DV-6 tubes that can be used with the
MODEL 4/6 with AVC.
1.3 ACCESSORIES
1.3.1 Installation Accessories
Request Hastings Product Bulletin 100C
for vacuum hardware available for
simplifing installation of the vacuum
gauge tube.
1.4 SPECIFICATIONS
Pressure Measurement Range:
d-4C < 0.01 Torr = ur (under range)
0.01 to 20 Torr

148-0598 Rev. A Page 4 May 1998
(0.01 to 20 millibar)
> 20 Torr = or (over range)
d-6C < 0.001 Torr = ur (under range)
0.001 to 1.0 Torr
( 0.001 to 1.0 millibar)
> 2.0 Torr = or (over range)
Ambient Operating Temperature:
0 to 50ºC
Ambient Storage Temperature:
-10 to 60ºC
Power Supply:
115 vac, 60 Hz ±10%
3.6 VA
¼ amp fuse
Dimensions:
48 mm x 96 mm x 116 mm
1.89 in x 3.78 in x 4.57 in
Weight:
390 grams / 0.86 lb.
1.5 WARRANTY
Teledyne Brown Engineering Hastings
Instruments warrants this product, for a
period of one year from date of
shipment, to be free from defects in
material and workmanship. This
warranty does not apply to defects or
failures resulting form unauthorized
modification, misuse, or mishandling of
the product. This warranty also does not
apply to batteries, or other expendable
parts, nor to damage caused by leaking
batteries 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.
Teledyne Brown Engineering Hastings
Instruments will, at its option, repair,
replace, or refund the selling price of the
product if Teledyne Brown Engineering
Hastings Instruments determines, in
good faith, that it is defective in
materials or workmanship during the
warranty period, provided that the
product is returned to Teledyne Brown
Engineering Hastings Instruments
together with a written statement of the
problem and a Repair Authorization
Number. A Service Form is include in
the back of this manual.
2.0 RECEIVING
INSPECTION
2.1 UNPACKING MODEL 4/6
Carefully unpack the Hastings Digital
Vacuum Instrument, Part Number
MODEL 4/6. (You probably ordered
an AVC module and DV series gauge
tube with the MODEL 4/6) Inspect all
the items received at this time to detect
any obvious damage that occurred
during shipment. Immediately advise
shipper when damage is evident.
2.2 IDENTIFICATION
Identify each item and quantity received
with those listed on the packing list.
3.0 INSTRUMENT
SETUP & TUBE
INSTALLATION
This information is designed to prepare
the MODEL 4/6 for proper operation

148-0598 Rev. A Page 5 May 1998
with the AVC module and either a DV-4
or DV-6 series gauge tube, and to set the
desired vacuum measuring units to either
Torr or mbar.
3.1 WIRING
3.1.1 Connect the 2 wire ac line cord
to the 2 position connector on the back
of the MODEL 4/6.
3.1.2 Connect the five wires coming
from the AVC module to 12 position
connector on the back of the MODEL
4/6. The connector positions are from
left to right and the description is on the
decal on the back of the MODEL 4/6.
AVC WIRE POS DESCRIPTION
Optional 1 Shield (Optional)
Blue 2 Gnd
White 3 setpoint
Yellow 4 input
Gray 5 P>SP
Brown 6 P<SP
Green 7 +18 vdc (unreg.)
8 not used
Optional 9 P>SP (30 mA)
Optional 10 P<SP (30 mA)
Optional 11 output Gnd
Optional 12 0-1 vdc output
NOTE: Be sure connectors are firmly
pushed in to the back of the MODEL 4/6
3.2 CONFIGURATION
If you ordered an AVC with a DV-4
tube the configuration should be
“torr and d-4C”.
If you ordered an AVC with a DV-6
tube the configuration should be
“torr and d-6C”.
To check your current configuration:
3.2.1 Plug the AVC module into either
a DV-4 or DV-6 tube. The tube should
be at atmospheric pressure.
3.2.2 Remove the front bezel and the
front panel. Locate the black push
button in the lower right hand corner.
3.2.3 Turn the MODEL 4/6 ON (or
plug into 115vac). Since the tube is at
atmospheric pressure, the display should
read “_or_” for over range. (It may read
E__0 or some pressure if the MODEL
4/6 is set for the wrong tube.)
3.2.4 Press and release the push button.
The display will read “torr” or “hPA”.
One hPa equals one millibar.
3.2.5 Press and release the push button
again within 10 sec. And the display will
read “d-4C” or “d-6C”.
3.2.6 Press and release the push button
again within 10 sec. The display will
flash the set point pressure. If you know
what your set point pressure should be,
you can adjust to that pressure using the
S.P. potentiometer on top of the AVC
module. The display will remain in the
set point mode until you press and
release the push button again.
3.2.7 Press and release the push button
again and you will return to the pressure
mode and the display will read “_or_”.
If the settings were all correct, the
MODEL 4/6 is ready to measure

148-0598 Rev. A Page 6 May 1998
vacuum. Just install the gauge tube in
the vacuum system.
To change the current configuration:
3.2.8 With the AVC module still
plugged into either a DV-4 or DV-6 tube
and the tube still at atmospheric
pressure, turn the MODEL 4/6 OFF.
3.2.9 Press and hold the push button
and turn the MODEL 4/6 ON. As soon
as the power is ON, release the push
button. The display will read 8888
3.2.10 Press and release the push button
within 5 sec. The display will read the
program code. For example “A_2.0” or
higher.
3.2.11 Press and release the push button
again within 5 sec. The display will read
“rSEt”. Press and release again within 5
sec. to reset the original factory
calibration. (If you have made a custom
calibration, do nothing and the display
will advance to the next mode in about 5
sec. leaving your custom calibration in
memory.)
3.2.12 When the program has advanced
to next mode, the display will read either
“torr” or “hPA” (millibar). If the
pressure units are correct do nothing and
the display will automatically advance to
the next mode in about 5 sec. If you
wish to change the pressure units, press
and release the push button within 5 sec.
The new pressure units will be displayed
and in about 5 sec. the display will
advance to the next program mode.
3.2.13 When the program has advanced
to the next mode, the display will read
either “d-4”, “d-6”, d-4C”, or “d-6C”
(NOTE: The d-4 and d-6 settings are not
used with the AVC module.) If the tube
setting is correct, do nothing and the
display will automatically advance to the
next mode in about 5 sec. If you wish to
change the tube setting, press and release
the push button within 5 sec. until the
correct tube setting is displayed. In
about 5 sec. the display will advance to
the next program mode.
DO NOT PRESS THE MODE
SWITCH AGAIN UNTIL THE
MODEL 4/6 RETURNS TO THE
MEASUREMENT MODE AND
READS “_or_”.
This takes about 50 seconds.
NOTE: The remaining modes, CAL.H
and CAL.L are for calibration and could
change the calibration if the tube is at
atmospheric pressure.
3.3 INSTALLING VACUUM
GAUGE TUBE
The Vacuum Gauge Tube is a required
accessory because of the wide variety of
tubes that can be used.
3.3.1 The vacuum gauge tube is
shipped with a protective cap covering
the evacuation port to keep the
thermopile elements clean and free from
physical damage. Remove the protective
cap prior to installing the tube.
3.3.2 The vacuum gauge tube can be
mounted in any position without
affecting calibration. The recommended
position is with the tube vertical and the
stem down so that condensable vapors
do not collect in the tube.
3.3.3 Most tubes will have a 1/8” NPT
threaded stem. This should be screwed

148-0598 Rev. A Page 7 May 1998
in the vacuum system using a suitable
sealant, such as Teflon tape or Vac-Seal.
If possible, leak test this connection
before making any vacuum
measurements. For high vacuum
systems consider using a gauge tube
with VCR, KF, or Conflat Flange
connection.
4.0 OPERATION
4.1 AVC MODULE
The Vacuum Gauge Tube is connected
to the MODEL 4/6 by means of the
cylindrical AVC module.
CAUTION: When disconnecting the
AVC module from a gauge tube, hold
the module firmly and pull straight back.
Do not pull by the cable.
4.2 TAKING A VACUUM
MEASUREMENT
4.2.1 With the MODEL 4/6 connected
to the AVC module, and the AVC
module plugged into the DV gauge tube,
turn the power ON.
4.2.2 The MODEL 4/6 will display the
pressure in the vacuum gauge tube.
Remember, the display will read “_or_”
if the pressure is above the measuring
range (20 torr for the DV-4 and 2 torr for
the DV-6), and it will read “_ur_” if the
pressure is below the measuring range
(0.10 torr for the DV-4 and 0.001 torr for
the DV-6).
4.3 RESOLUTION OF DIGITAL
METER
4.3.1 The resolution of the digital
meter varies with pressure. For the
DV-4, 0.10 to 20 Torr range, the
resolution is:
Range Resolution
0.010 to 0.100 Torr 0.002 Torr
0.10 to 1.00 Torr 0.01 Torr
1.0 to 10.0 Torr 0.1 Torr
10 to 20 Torr 1 Torr
4.4.3 The resolution of the digital
meter varies with pressure. For the,
0.001 to 2 Torr range, the resolution is:
Range Resolution
0.001 to 0.100 Torr 0.001 Torr
0.10 to 0.40 Torr 0.01 Torr
0.40 to 1.00 Torr 0.02 Torr
5.0 CALIBRATION
There are three types of calibration that
can be performed on the MODEL 4/6.
•Restore Factory Calibration
•Custom Calibration
•Reference Tube Calibration
5.1 RESTORE FACTORY
CALIBRATION
Factory calibration is based on the
average DV-4 and DV-6 calibration
curves, which are stored in the MODEL
4/6. To restore the Factory calibration:
In order to perform the Restore Factory
or Custom calibration you will have to
remove the front bezel and the front
panel. Locate the black push button in
the lower right hand corner.
5.1.1 With the AVC module plugged
into either a DV-4 or DV-6 gauge tube
and the tube at atmospheric pressure,
turn the MODEL 4/6 OFF.
5.1.2 Press and hold the push button
and turn the MODEL 4/6 ON. As soon

148-0598 Rev. A Page 8 May 1998
as the power is ON, release the push
button. The display will read 8888
5.1.3 Press and release the push button
within 5 sec. The display will read the
program code, “A_2.0” or higher.
5.1.4 Press and release the push button
again within 5 sec. The display will read
“rSEt”. Press and release the push
button again within 5 sec. to reset the
original factory calibration. (NOTE;
Resetting the factory calibration may
also reset the pressure units of measure
and/or the tube type.)
5.1.5 When the program has advanced
to next mode, the display will read either
“torr” or “hPA” (millibar). If the
pressure units are correct do nothing and
the display will automatically advance to
the next mode in about 5 sec. If you
wish to change the pressure units, press
and release the push button within 5 sec.
The new pressure units will be displayed
and in about 5 sec. the display will
advance to the next program mode.
5.1.6 When the program has advanced
to the next mode, the display will read
either “d-4”, “d-6”, d-4C”, or “d-6C”
(NOTE: The d-4 and d-6 settings are not
used with the AVC module.) If the tube
setting is correct, do nothing and the
display will automatically advance to the
next mode in about 5 sec. If you wish to
change the tube setting, press and release
the push button within 5 sec. until the
correct tube setting is displayed. In
about 5 sec. the display will advance to
the next program mode.
DO NOT PRESS THE MODE
SWITCH AGAIN UNTIL THE
MODEL 4/6 RETURNS TO THE
MEASUREMENT MODE AND
READS “_or_”.
This takes about 50 seconds.
5.2 CUSTOM CALIBRATION
CAUTION: The MODEL 4/6 will only
accept two high calibration points two
low calibration points. Do not attempt to
perform a custom calibration unless you
can establish, hold, and accurately
measure 20 Torr and 0.10 Torr for the
DV-4 or 1 Torr and 0.001 Torr for the
DV-6.
5.2.1 With the AVC module plugged
into either a DV-4 or DV-6 gauge tube
and the tube at atmospheric pressure,
turn the MODEL 4/6 OFF.
5.2.2 Press and hold the push button
and turn the MODEL 4/6 ON. As soon
as the power is ON, release the push
button. The display will read 8888
5.2.3 Press and release the push button
within 5 sec. The display will read the
program code, “A_2.0” or higher.
5.2.4 Press and release the push button
again within 5 sec. The display will read
“rSEt”. Do nothing and the display will
advance to the next mode in about 5 sec.
5.2.5 The display will read the
pressure units previously selected. Do
nothing and the display will
automatically advance to the next mode
in about 5 sec.
5.2.6 The display will read either the
“d-4C”, or “d-6C” you previously
selected. Do nothing and the display

148-0598 Rev. A Page 9 May 1998
will automatically advance to the next
mode in about 5 sec.
5.2.7 The display will read CAL.H.
Press and release the push button. The
display will read C_20 if you have
previously selected d-4C, or C__1 if you
have previously selected d-6C.
5.2.8 With the pressure is exactly 20
Torr (DV-4) or 1 Torr (DV-6) press and
release the push button. This stores the
tube output in memory and advances to
the next mode.
5.2.9 The display will read CAL.L.
Press and release the push button. The
display will read C0.01 (d-4C) or C.001
(d-6C).
5.2.10 Evacuate the gauge tube to 0.01
Torr if d-4C was selected or to 0.001
Torr if d-6C was selected.
5.2.11 Press and release push button.
The display will indicate 0.01 Torr if
d-4C was selected or 0.001 Torr if d-
6C was selected. This stores the tube
output in memory and returns the
MODEL 4/6 to its normal measuring
mode.
5.2.12 This completes the custom
calibration.
5.3 REFERENCE TUBE
CALIBRATION
The low end of the vacuum range can be
set with a Hastings Reference Tube,
such as the DB-16D which is used with
the DV-4 range, or the DB-20 is which
is used with the DV-6 range. The DB-
16D should have a marked calibration
value between 0.01 Torr and 0.20 Torr.
The DB-20 should have a marked
calibration value between 0.001 Torr and
0.010 Torr. (1 to 10 millitorr)
You do not need access to the push
button for this calibration procedure.
5.3.1 Connect the Reference Tube to
the AVC module. Turn the MODEL 4/6
ON. You are in the normal measuring
mode. Wait about 1 minute.
5.3.2 The display should read the
pressure marked on the Reference Tube.
NOTE: Some DB-16D Reference
Tubes may be marked in mmHg and
some DB-20 Reference Tubes may be
marked in microns Hg. or millitorr. To
convert:
1 mmHg = 1 Torr
1 micron Hg = 0.001 Torr
1 millitorr = 0.001 Torr
5.3.3. If the displayed pressure does not
match the pressure marked on the
Reference Tube, adjust the
potentiometer marked Pmin on the top
of the AVC module until they agree. Do
not confuse Pmin with the potentiometer
marked S.P. also located on the top of
the AVC module.
5.3.4. This completes the Reference
Tube calibration.
6.0 MAINTENANCE
The only authorized maintenance at the
user level for the MODEL 4/6 is
replacement of the ¼ amp fuse in the ac
line connector.
7.0 TROUBLE
SHOOTING AND

148-0598 Rev. A Page 10 May 1998
REPAIR
7.1 TROUBLESHOOTING
SYMPTOM: Meter reads “E__0”
PROBABLE CAUSE 1: Gauge
tube disconnected or defective.
REMEDY: Connect or replace gauge
tube.
PROBABLE CAUSE 2: DV-6 tube
connected to MODEL 4/6 calibrated for
a DV-4 tube.
REMEDY: Use correct gauge tube.
SYMPTOM: Meter reads some
pressure like “0.26” when tube is at
atmospheric pressure.
PROBABLE CAUSE: DV-4 tube
connected to MODEL 4/6 calibrated for
a DV-6 tube.
REMEDY: Use correct gauge tube.
SYMPTOM: Abnormal pressure
readings.
PROBABLE CAUSE 1: Using
incorrect gauge tube, gauge tube
contaminated, or gauge calibration
changed.
REMEDY: Replace with correct gauge
tube, clean gauge tube, perform Custom
calibration per Section 5.2.
PROBABLE CAUSE 2: Selected
wrong tube setting during configuration,
or inadvertently activated CAL.H or
CAL.L during Configuration when tube
was not at the correct pressure.
REMEDY: Re configure MODEL 4/6,
or activate Factory Reset.
7.2 WARRANTY REPAIR
Hastings Instruments will repair or
replace, at their option, any vacuum
product covered under the warranty
expressed in Section 1.5, that is returned
transportation prepaid to their plant in
Hampton, Virginia. All products
returned must be accompanied by the
Service Form or a written description of
the problem. Please contact factory for
a Return Material Authorization (RMA)
number before returning any product for
repair.
7.3 NON-WARRANTY REPAIR
Most non-warranty repairs have a fixed
repair cost. Please contact factory of this
fixed repair cost and issue a purchase
order for this amount when returning an
instrument for repair. Also obtain a
Return Material Authorization (RMA)
number from the factory. The returned
product must be accompanied by the
Service Form or a written description of
the problem.
7.4 RETURN ADDRESS
TELEDYNE BROWN ENGINEERING
HASTINGS INSTRUMENTS
804 NEWCOMBE AVENUE
HAMPTON, VA 23669 USA