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CALIBRATION
1. Install a sample holder assembly containing the filter or combination filter and
cartridge normally to be used for air sampling into the front of the barrel and
connect inlet to air flow calibrator (RADēCO Model C-828 or C-8528, depending
on filter media, with adaptor). See Figure 5.
2. Plug unit into AC power supply.
3. Press CLEAR and enter the calibration code “3434” then press ENTER
4. If Step 3 has been done correctly, after approximately five seconds the display
will prompt:
CALIBRATE FLOW?
1= YES, 0= NO
Press “1” for Yes.
5. Display will read:
VOLUME UNITS?
1= ft3, 0=liters, 2= m3
6. Display will read:
Adjust Flow For then Enter high Flow
High Flow Rate Rate: 0.0 CFM
Adjust flow to high point of calibration range by using a small flat head screw
driver and adjusting the potentiometer located on the side of the unit (Example: 3-
4-5 CFM, 3 = LOW POINT, 4 = MID POINT, 5 = HIGH POINT) Enter the high
flow rate using the keypad and then press “ENTER”. Keep flow constant for 10
seconds.
7. Display will read:
Adjust Flow For then Enter Mid Flow
Mid Flow Rate Rate: 0.0 CFM
Reduce flow to mid point of calibration range. Enter rate using keypad and then
press “ENTER”. Keep flow constant for 10 seconds.
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