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Filter Integrity Tester
Application Statement:
Collective Protection (ColPro) Filtration Systems represent a critical layer of protection against dangerous and sometimes deadly Chemical, Biological, Radiological and Nuclear (CBRN) agents. Insuring that these filter systems and the filter elements are in satisfactory operational condition is essential. Confirmation of the operational integrity of collective protection filtration systems can be a difficult process. Whether done for compliance with routine maintenance practices or to verify the integrity of the seals after the installation of replacement filters, consistent and reliable results are mandatory. And, while there are a variety of testing systems on the market, some of those systems can be difficult to set-up, calibrate and in some cases, can be sensitive to changing atmospheric conditions all of which can result in inaccurate or false positive readings.
General Product Description:
Current technology and approaches use either low boiling
Chlorofluorocarbons (CFC) or liquid at room temperature,
Hydrochlorofluorocarbons (HCFC). Moderate Relative
Humidity (RH), e.g., 60%, can produce false positives for
the more volatile CFC probe chemicals. While the higher
boiling HCFC is much less sensitive to adsorbed water, false
positives still are a problem when filters have been exposed
to high relative humidities (80% RH).
Advantages
- The Hunter FIT system utilizes Acetone as the probe
chemical. Acetone is relatively insensitive to adsorbed
water and it will provide an accurate leak test even at
relative humidities approaching 100%. Acetone is a
common chemical which is readily available, eliminating
the safety concerns associated shipping chemicals as
required by other systems.
- Completely automated injection and detection systems.
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The injection system includes:
- A proprietary chemical injection system that measures
the total mass of acetone introduced into the system.
- A stand-alone micro-controller which permits both
remote location operation as well as easy time
synchronization with the detector.
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Detection system includes:
- An automatic, internal calibration system – no
compressed calibration gas cylinders are required.
- A continuous automated air purifying system
that does not require compressed air to operate the unit.
- An automated zeroing function.
- A unique leak test based on mass ratio rather than
concentration that decreases the test time to 10 minutes
(once the unit is calibrated and zeroed).
- The capability to measure leaks below 1x10-4.
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Other features include:
- Simple straight-forward design allows for easy set up,
including remote injector location.
- An automated test sequence that includes both
calibration and zeroing
- The ability to run individual test steps is also available.
- Lap top computer and proprietary software provide
real-time graphing of the test results as well as system
control
- The capability to both control and or monitor the test
from a remote location.
- Internal flash memory that can save the results
of up to 1,000 tests.
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Designed for Remote Operation
The Hunter FIT is designed using state-of-the-art Radio
Frequency (RF) transceiver technology allowing for quick
and easy set-up. No cables or connections to limit placement
of the injector and detection units. The integrated control
module with digital readout provides simple straight-forward
operation. Proprietary software allows the operator to monitor
and plot test results which can be saved for future reference
and reporting functions.
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Typical Test Procedure
The Hunter FIT injector unit containing the probe chemical
(Acetone) is placed at the inlet of the filtration system. The
injector unit automatically injects a measured amount of the
probe chemical into the filtration system or inlet of the filter
bank. The air stream carrying the probe chemical travels the
filter system and exits at the discharge or outlet of the system.
The detector unit, placed at the outlet of the system or
filter bank, monitors the air flow for evidence of the probe
chemical. The Hunter FIT is designed with a unique
analytical chamber where an enrichment process takes
place to detect the presence of probe chemical below
10 ppb in the effluent stream. This incorporation of such
extreme sensitivity insures that any compromise in the
integrity of the filter seals either between filters or between
the filters and the housing will be detected.
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Contact Hunter for more information on the FIT, or other similar products.
Filter Integrity Tester - Specifications
PDF Datasheet |
| Injector Unit: |
L: 20" W: 6.5" H: 18.5" Wt: 36 lbs. |
| Detector Unit: |
L: 20" W: 18.5" H: 8" Wt: 37.5 lbs. |
| Test capacity in system output: up to 20,000-cfm. Models with
test capacity up to 60,000-cfm are available by special order. |
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