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®
VACUUM SENTRY
DUAL PORT
VG640D
SEALED UNIT PARTS CO., INC.
PO Box 21, 2230 Landmark Place
Allenwood, NJ 08720 USA
www.supco.com
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VG640D Vacuum Sentry Instructions
FEATURES
• Unmatched Resolution (as low as 0.5 micron)
• ½ Second Response Time (update rate)
• Backlit LCD
• Local Audible and Visual Alarm
• Radio Frequency (RF)
Transmission Signal
OPERATING CONTROLS
To turn the unit ON, press and release the Power Button.
To turn the unit OFF, press and hold the Power button, until the unit turns OFF.
Pressing and releasing the Power button turns on the backlight.
Changing the scale: Press the UNITS button while in normal operation
to change the display to the next scale. The scale order is: Micron,
mTorr, Torr, Pascal, mBar. The VG640D will keep the scale settings
even if the power is turned OFF
• Auto Shut Off
• Built-in Hanger
• User Addressable Remote Alarm
(R100) available
• Two Year Warranty
Vacuum Gauge
Service Hose
CONNECTING THE
640D TO THE
VG
VACUUM SYSTEM
The VG640D should be connected to the vacuum system
at the vacuum port. The "Auxiliary Port" is
primarily for cleaning And should normally be
closed with the supplied cap. It is possible to
connect the VG640D in-line, however it may restrict
flow and increase the evacuation time
CLEANING THE VG640D VACUUM SENSOR
It is recommended that the VG640D sensor be cleaned periodically to
.
maintain unit accuracy. Oil and other contaminants reduce the accuracy
of the VG640D unit. Follow the instructions below for cleaning.
• Use an eyedropper to pour a few drops of ordinary rubbing alcohol into
either port. Keep the other port closed.
• Close the port with the supplied cap.
• Shake the VG640D unit for approximately 10 seconds. A slight movement of the vacuum
sensor in the case is normal and does not affect the internal connection in any way.
• Open the vacuum port. Empty the alcohol and air dry the sensor.
Close the vacuum port with the supplied cap when the VG640D is not used. This prevents
contamination of the sensor.
90% of the vacuum gauge warranty returns that SUPCO receives are due to contaminated
sensors. For vacuum gauges that are heavily contaminated, leave the alcohol in the gauge
overnight to clean the sensor more effectively.
CHECKING HVAC SYSTEMS FOR LEAKS
When checking a system for leaks use only copper tubing and a vacuum proof valve.
Generally standard hoses will not hold a vacuum. If using the blank-off valve on the vacuum
pump check it for leaks periodically. At the beginning of the test the VG640D reading may
increase due to system equalization. The vacuum reading should hold after a minimum of
5 minutes. If the reading continues to increase it may indicate a leak in the system.
To System
Main Shut
Off Valve
Valve for
Pressurizing System
or Breaking
Vacuum to
Atmosphere
Gauge Valve
Vacuum Pump
Valve
Vacuum
Pump
SETTING THE ALARMS
Press the SET button. The unit will display "Set Alarm Low" and show the current value of
the low alarm. Use the up (UNITS) and down (MUTE) buttons to set the alarm from
0 to 19000 Microns. To turn the low alarms OFF, press the down button while the set low
alarm is at 0 Microns, or press the up button while the set low alarm is at 19000 Microns.
Press the SET button when you are done setting the low alarm. The unit will now display
"Set Alarm High" and show the current value of the high alarm. Use the up (UNITS) and
down (MUTE) buttons to set the high alarm from the value of the low alarm to
19000 Microns. Note that the VG640D unit will not allow you to set the high alarm below the
low alarm. To turn the high alarms OFF, press the down button while the set high alarm is at
the low alarm value, or press the up button while the set high alarm is at 19000 Microns
.
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Press the SET button when you are done setting the high alarm. The unit will return to
normal operation. To see the current value of the low and high alarms, press the SET button.
The unit will show the current value of the low alarm. Press the SET button again to display
the current value of the high alarm. Press the SET button again to return the unit to normal
operation. When the VG640D unit is turned OFF, the value of the low alarm is retained, but the
value of the high alarm is always set to OFF. This prevents the VG640D from going into alarm
mode when the unit is powered up while vacuum is not applied.
When high alarm is set to anything but OFF, the unit will alarm when vacuum is
NOTE:
not showing.
ALARM CONDITION
During an alarm condition, the unit will beep and the display backlight will flash red.
The unit will flash "Alarm Low" or "Alarm High" to indicate which alarm is active.
To silence the alarm, press the MUTE button. The unit will still flash the red backlight and
display the "Alarm Low" or "Alarm High" message.
DISPLAY RESOLUTION
The display resolution depends on the vacuum displayed and is as follows:
Vacuum Range
(Microns)
0to140
140 to 400
400 to 800
800 to 2000
2000 to 6000
6000 to 9000
9000 to 16000
16000 to 19000
Above 19000
Resolution
(Microns)
0.5
1
2
5
20
100
200
1000
----is displayed
Vacuum Range
(Pascal)
0to18
18 to 50
50 to 100
100 to 260
260 to 800
800 to 1200
1200 to 2100
2100 to 2600
Above 2600
Resolution
(Pascal)
0.05
0.1
0.2
0.5
2
10
20
100
----is displayed
LOW POWER MODE AND AUTO SHUTOFF
If no alarms are set and no buttons are pushed, the unit will automatically turn OFF to
conserve power, as follows:
• No Vacuum is Showing: 10 Minutes
• Vacuum is Showing: 1 Hour
When alarms are set, the unit will turn OFF after 8 hours of operation.
In all modes after 10 minutes of operation, if no button is pressed, the unit will enter a low
power mode. In this mode the unit updates the display every 7 seconds, instead of every
0.5 seconds. This extends the battery life about 3 times. To exit the low power mode at any
time, press any button on the unit.
VG640D WARRANTY
LIMITED TO TWO YEARS FROM DATE OF PURCHASE
Sealed Unit Parts Co., Inc. warrants its products to be free from defects in materials and
workmanship under normal use and service. Sealed Unit Parts Co., Inc. will repair or
replace without charge any such products it finds to be so defective on its return to
Sealed Unit Parts Co., Inc. The foregoing is in lieu of all other expressed or implied
warranties, including those of merchantability or fitness for a particular purpose.
The foregoing is also the purchaser's sole remedy and is in lieu of all other guarantees,
obligations or liabilities or any consequential or incidental damages attributable to
negligence or strict liability.
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VG640D
69
87152 21863
Digital Vacuum Gauge
Features / Benefits
• Unmatched Resolution (as low as 0.5 micron)
• ½ Second Response Time (update rate)
• Backlit LCD
• Local Audible and Visual Alarm
• Radio Frequency (RF)
Transmission Signal
VG640D Specifications
Sensor Type
Connector Type
Vacuum Range
Resolution Measurement Range Resolution
Units
Accuracy
Update Rate
Alarms
Remote Alarm R100
( for high and low vacuum
Optional)
Alarm Volume
Operating Temperature Range
Overpressure
Power Source
Battery Life
Auto Shutoff
Weight
Dimensions
Thermistor
Standard ¼ inch male flare fitting.
0 – 19,000 Micron (0 – 2,600 Pascal).
0-140 0.5 Micron
140-400 1 Micron
400-800 2 Micron
800-2000 5 Micron
2000-6000 20 Micron
6000-9000 100 Micron
9000-16000 200 Micron
16000-19000 1000 Micron
Micron, milliBar, Pascal, Torr, milliTorr
+/-10% or +/-10 Micron, whichever is larger
(50 to 2000 Microns) at 75°F
0.5 sec.
Audible and visual alarm for high and low vacuum
Up to 400ft remote audible, visual and vibrating alarm
87 dB for both unit and remote
0°F to 150°F ( -17°C to 65°C)
800 PSI max (55 Bar)
3 AA Batteries
600 Hours continuous usage, with battery indicator.
8 hours when alarms are active.
When alarms are disabled:
10 minutes when vacuum reading is above
19,000 Microns
1 hour when vacuum reading is below 19,000 Microns
6oz
5.5” H X 2.75” W X 1.5” D
• Auto Shut Off
• Built-in Hanger
• User Addressable Remote Alarm
(R100) available
• Two Year Warranty
SEALED UNIT PARTS CO., INC.
PO BOX 21, 2230 LANDMARK PLACE
ALLENWOOD, NJ 08720 USA
www.supco.com
P/N 22789
Rev. 08282013
H27-197
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