Form 37711 Rev 1809
Page 4 of 14
Operation
High Flow Applications (1000 to 5000 ml/min)
Deactivate the Regulator for High Flow
1. To ensure the pump is set for high flow, remove the cap screw
(Figure 1)
covering the regulator valve
and turn the exposed screw
clockwise
until it stops. Do not overtighten.
See right.
2. Replace the cap screw. The pump is now set for high flow.
Set/Calibrate Flow Rate
• Allow pump to equilibrate after moving it from one temperature extreme to another.
• Charge pump battery completely before calibration and sampling.
1. Ensure that the battery is fully charged and that the pump has run for five minutes before calibrating. Leave the pump running.
2. Prepare the calibrator
(see calibrator instructions)
. Using flexible tubing, connect the calibrator outlet (suction port) to the sampling
medium inlet.
3. Using 1/4-inch Tygon tubing, connect the sampling medium outlet to the pump inlet
(Figure 2)
.
4. Set the flow rate using the flow adjustment screw
(Figure 1)
until the calibrator indicates the method-specified flow rate. Take a
minimum of three readings and record the average flow rate, as per OSHA/NIOSH instructions.
5. When calibration is complete, turn off the pump and disconnect the calibrator.
For high flow, turn regulator
valve screw clockwise.
Figure 2.
Calibration train with filter cassette
Flow adjustment screw
On/Off switch
Tubing
chek-mate
Calibrator
Sampling medium
Suction port
Pump inlet
