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- Turn on the computer.
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| Control Room |
| |
 |
- Turn on the blower control unit by turning the black switch on front of
the box to ‘on’. A damper is installed in the blower circuit to prevent air
from flowing while the blower is turned off. Make sure this damper is in open
position. The switch is located on the left side of the blower control unit.
Wait untill only the green light is on. This can take approximately 1 minute.
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| Blower Control
Unit |
| |
 |
- Double click Shortcut to K&N Filter DAQ on the desktop
screen to start the program. The main menu appears.
- Condition the absolute filter at 110% of the rated flow of ambient air for
15 minutes to reduce any subsequent errors in measurements caused by losses of
fibers or materials. The conditioning of the absolute filter can be performed
in the Manual Test Mode. Walk through the following steps to condition the
absolute filter.
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|
Program
Main menu |
| |
 |
- Install test filter in the test stand.
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| Assortment of
test fixtures for various size air filters |
| |
 |
- Lower the jacks supporting the air outlet tube in order to be able to
lower the absolute filter.
- Lower the absolute filter by pressing the red button on front of the test
stand.
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|
Absolute
filter housing |
| |
 |
- Carefully slide out the absolute filter.
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|
Absolute
filter |
| |
 |
- Dry the absolute filter in a ventilated oven at a constant temperature of
105°C ± 5°C until mass stabilization has been reached. If stabilization cannot
be determined, a minimum time of 4 hours is required. Weigh the filter inside
the oven and write down the exact mass to the nearest 0.01 g.
- Slide in the absolute filter. Press the two green buttons on front of the
test stand at the same time to raise the absolute filter. Subsequently raise
the jacks supporting the air outlet tube.
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| Drying Oven |
| |
 |
- Record ambient temperature, ambient pressure and relative humidity.
|
| System
measurements from console |
| |
 |
- Before using the test dust, mix a quantity sufficient to cover the test
requirements in a sealed container for a minimum of 15 minutes. Subsequently
store the dust at a constant temperature of 105°C ± 5°C until mass
stabilization has been reached. Now let the dust acclimatize to Standard test
conditions.
|
| Coarse & Fine
Test Dust |
| |
Test
information tab |
- Double click Shortcut to K&N Filter DAQ on the desktop
screen to start the program. In the main menu click Automated
Test Mode. The Test Information tab appears.
Fill out the
test number, the part number and other required specifications.
|
| |
Test parameters tab
Test selection screen
Full-Life Efficiency & Dust Capacity Test Screen |
- Click Test Parameters tab. Now the desired test should be
selected.
- Efficiency and dust capacity test
Make sure the button next to Efficiency and Dust Capacity Test
is green. This indicates that the concerned test is selected. Fill out the
desired parameters at Air Flow Rate and Dust Feed
Rate. Based on the air flow, calculate the test dust feed rate using
a dust concentration of 1.0 g/m3 of air. This means that Air Flow Rate
and Dust Feed Rate should have the same values. In special
cases (e.g. small filters) 0.25 g/m3 or 0.5 g/m3 may be allowed. Choose for
ISO 12103-A2 (ISO fine) or ISO 12103-A4 (ISO coarse) test
dust. In absence of an agreement on the dust: for single stage filters
use ISO Fine test dust and for multi stage filters use ISO Coarse test dust.
At the field Termination Criteria on bottom of the screen,
enter the terminating differential or restriction pressure.
Press
Return to go to the next screen.
- Click Run Efficiency & Dust Capacity Test. The
‘Efficiency & Dust Capacity Test’ screen appears.
|
| |
 |
- Load dust from the container into the feeder and click Read Scale
to enter starting mass of dust in feeder. Record the mass of dust.
Click the button Press when Ready to Start Test.
Now the
test starts. The blower will turn on and the air flow will be increased
until the set air flow rate from point 14 is reached. If the air flow
rate has stabilized, let the blower run for at least 15 minute to condition
the test filter.
|
| Test dust being
loaded into feeder |
| |
 |
- Weigh the test filter.
|
| Air filter
weight |
| |
 |
- Now go to the Measurements tab and click Record Initial Delta P
and Start Dust Feeder. This will start up the dust feeder.
The test ends automatically when the termination criteria from point 15 are
reached.
|
| Test dust being
fed into test system |
| |
 |
- Record ambient temperature, ambient pressure and relative humidity.
- Carefully collect the dust on the exterior surfaces of the test
assembly (i.e. air box, not the test filter element itself) or other parts
attached to the intake side of the test stand and transfer this to the dust
feeder.
Determine the mass of dust that is still in the dust feeder using the scale
of the dust feeder. Record the mass of dust left in the feeder to the nearest
0.1 g.
|
| Test system |
| |
 |
- Carefully remove the test filter without losing any dust. Note any
evidence of seal leakage or unusual conditions. Weigh the test filter in grams
to within 1% of the actual value.
- Brush any observed dust on the downstream side of the intake tract onto
the absolute filter.
- Lower the jacks supporting the air outlet tube in order to be able to
lower the absolute filter housing.
- Lower the absolute filter by pressing the red button on front of the test
stand.
|
| Air filter after
test |
| |
 |
- Carefully slide out the absolute filter without losing any dust.
|
| Absolute filter
removal |
| |
Absolute filter being dried in oven |
- Dry the absolute filter in a ventilated oven at a constant temperature of
105°C ± 5°C until mass stabilization has been reached. If stabilization cannot
be determined, a minimum time of 4 hours is required. Weigh the filter inside
the oven and write down the exact mass to the nearest 0.01 g.
- Slide in the absolute filter. Press the two green buttons on front of the
test stand at the same time to raise the absolute filter. Subsequently raise
the jacks supporting the air outlet tube.
- Shut down program and test stand.
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| |
