Geotech High Vacuum Sampler Manuel utilisateur
Rev 05/06/13 Part # 12151001
Geotech High
Vacuum Sampler
Installation and Operation Manual
1
Table of Contents
SECTION 1: SYSTEM DESCRIPTION .............................................................................. 3
SECTION 2: SYSTEM INSTALLATION ............................................................................. 6
SECTION 3: SYSTEM OPERATION.................................................................................. 7
SECTION 4: SYSTEM MAINTENANCE............................................................................. 8
SECTION 5: SYSTEM TROUBLESHOOTING................................................................... 9
SECTION 6: SYSTEM SPECIFICATIONS....................................................................... 11
SECTION 7: SYSTEM SCHEMATIC................................................................................ 12
SECTION 8: REPLACEMENT PARTS AND ACCESSORIES.......................................... 13
THE WARRANTY............................................................................................................. 16
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2
NOTE
DOCUMENTATION CONVENTIONS
This uses the following conventions to present information:
An exclamation point icon indicates a WARNING of a situation
or condition that could lead to personal injury or death. You
should not proceed until you read and thoroughly understand the
WARNING message.
WARNING
CAUTION
A raised hand icon indicates CAUTION information that relates to
a situation or condition that could lead to equipment malfunction
or damage. You should not proceed until you read and thoroughly
understand the CAUTION message.
A note icon indicates NOTE information. Notes provide additional
or supplementary information about an activity or concept.
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3
Section 1: System Description
Function and Theory
The High Vacuum Sampler is an air-sampling device that uses a compressor to draw air
from a sampling source and convey that sample into sealable sample bags. When an
external 12 VDC power source connects to the unit, the compressor is capable of
producing a vacuum of up to 27 in-Hg. Typical applications include soil vapor points or
Soil Vapor Extraction (SVE) systems.
Figure 1-1 is an example of the High Vacuum Sampler. Each High Vacuum Sampler
comes with a standard DC power cord (Figure 1-2) to allow the unit to operate from a
12VDC battery or cigarette lighter. An optional 110VAC power cord with adapter (Figure 1-
2) is also available. 1-liter and 3-liter sample bags (Figures 1-3 and 1-4) are available from
Geotech which can be used to easily collect air samples. See Section 8 for part numbers
to these accessories.
Figure 1-1
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4
Figure 1-2
Figure 1-3 –Example of ALTEF 1 Liter Bag
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Figure 1-4 –Example of Tedlar 1 and 3 Liter Bags
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Section 2: System Installation
Installing the High Vacuum Sampler
1. Verify that the power switch is in the “OFF” position.
2. Plug the DC power input cord into a fuse protected 12V lighter receptacle on a
negatively grounded system or plug the optional AC power cord with 12VDC
adapter into a 110VAC power source. If the unit is wired directly to a 12V battery,
make sure to connect the positive (red) alligator clip to the positive (red) battery
terminal and connect the negative (black) alligator clip to the negative (black)
battery terminal.
3. Securely plug the circular plug connector on the opposite end of the cable to the
corresponding receptacle on the face of the controller.
4. Turn on the High Vacuum Sampler briefly and verify its operation. Place your
thumb over both ports: Air should be blowing out the AIR OUT port and vacuum
should be present at the VACUUM IN port. Use the System Troubleshooting
procedures in Section 5 when there is no air flow or vacuum response on the
gauge.
5. Attach an air hose to the sample source and the other end to the VACUUM IN port
on the sampler. Next, connect an air hose to the AIR OUT port and the other end to
the sample bag.
The High Vacuum Sampler is ready to collect the sample.
Verify the 12VDC system to be used is rated and fuse protected for
operation at 15 amps continuous operation. Failure to verify system
rating could result in damage to equipment. Over-heated wiring
and other materials or components in contact or near by the power
delivery system could pose a potential fire or burn hazard.
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Section 3: System Operation
System Check
Double check that the 12VDC system positive and negative are not reversed at any
connection point before turning the device on.
Attach all tubing to the appropriate ports and proceed with collecting air samples.
When operating the High Vacuum Sampler the vacuum gauge should never exceed -25 in
Hg. Should the gauge ever hover between -22 and -25 in Hg, it would mean there is a
significant clog somewhere along the input line from the sample source, or the vacuum at
the source is greater than the High Vacuum Sampler’s potential.
Collecting an Air Sample
Geotech can provide 1 liter and 3 liter sample bags. These bags have a polypropylene
locking combo valve with septum. See Section 8 for part numbers.
Use the following procedure to collect an air sample.
1. Connect all tubing to the High Vacuum Sampler.
2. Turn on the unit and allow the air flow to run prior to attaching your sample bag so
that a good sample can be acquired.
3. Push the valve stem in on the bag to open the valve and connect the AIR OUT
tubing to the valve. The bag will begin to fill.
4. Once the bag is full, pull the valve stem out to lock the sample into the bag.
Remove the hose from the valve stem.
5. Continue with more samples or turn off the unit. Disconnect the power source when
not in use.
Do not operate this equipment if it has visible signs of significant
physical damage other than normal wear and tear.
Operating the equipment in any way other than described within
this document could potentially damage the equipment.
For use with negative (-) ground systems only. Damage will result
if the supply voltage exceeds 14 VDC.
Some care must be taken when filling the sample bags. Like a
balloon, if too much pressure is applied the bag will pop.
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Section 4: System Maintenance
Maintenance Procedures
Disconnect power source when not in use.
Unit must be returned to Geotech Environmental Equipment for any service. In order to
ensure a long service life, keep the High Vacuum Sampler clean. Often a soft, damp cloth
can be used to remove dust and dirt from the exterior surfaces of the enclosure. In
extreme cases, or to remove aged caked on dirt and dust, a mild soap and water solution
can be applied to a soft cloth and used to clean the exterior surfaces of the High Vacuum
Sampler. Do not immerse, soak or directly spray liquids on the High Vacuum Sampler.
Equipment should be repaired by Geotech Environmental Equipment
factory trained repair technicians only. Improper repair of equipment may
result in degradation of performance and/or service life. Disassembly
exposes potentially dangerous moving components that could injure
someone who is not properly trained to repair this equipment.
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9
Section 5: System Troubleshooting
The Geotech High Vacuum Sampler has been designed and manufactured to provide a
long service life and trouble free operation in the field. If the compressor (vacuum)
becomes sluggish then check the supply voltage. If the supply voltage falls below 12 VDC,
the compressor’s performance will be directly affected. A fully charged battery will produce
the best results.
Other sources of low vacuum may be attributed to 12V lighter receptacles or plug
connections. Make certain these connections are securely plugged in and clear of any
debris. Once securely plugged in, rotating the connection can often help if there is a dead
spot in the connector. Also, check for connection and cable fatigue, cracks, surface
oxidation, rust etc.
Troubleshooting Procedures
Problem: Compressor does not turn on
Solutions:
•Double check battery polarity is correct. In other words, the positive and negative
cables are connected positive to positive and negative to negative. The High Vacuum
Sampler is protected from damage due to reverse polarity connection.
•If ambient temperatures are in excess of 104°F (~40°C) then disconnect from power
and let sit in a cool location. Do not open the case for any reason. This will not hasten
the cooling process, but will invite debris into internal components that could result in
reduced life or immediate equipment failure.
•If the compressor still does not turn on then call Geotech Service at 1-800-833-7958
to arrange for the equipment to be sent back to a factory authorized repair location.
•If the 15 Amp circuit breaker is tripped, push to reset. If it trips again, call Geotech
Service at 1-800-833-7958 to arrange for the equipment to be sent back to a factory
authorized repair location.
Problem: Compressor turns on but there is no air flow to the sample bag
Solutions:
•Remove the air line from the AIR OUT port. Turn on the unit and block the AIR OUT
port with your thumb. If there is pressure against your thumb then check the tubing for
cuts, kinks and holes.
•Verify that the sample bag has not been cut or perforated.
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