11
CALIBRATION AND SAMPLING
Calibration
Allow pump to equilibrate after moving it from one temperature extreme
to another.
Calibrate pump
fl
ow rate with the IMPACT Sampler in line (loaded with
representative
fi
lter and impaction disc).
See pump and calibrator operating
instructions.
Set
the pump
fl
ow rate to 10 L/min (see Leland Legacy
Quick Guide). Ensure the pump has run for 5 minutes
before proceeding with calibration. Ensure the rain cover is
removed from the inlet and that the impactor is loaded with
representative media and fully assembled (see Inserting a
Collection Filter into the IMPACT Sampler and Inserting
an Impaction Disc into the IMPACT Sampler).
Screw the calibration adapter onto the impactor inlet.
Calibrate pump
fl
ow rate with a calibrator.
Adjust
the
fl
ow rate until the calibrator displays 10 L/min (see Leland
Legacy Quick Guide). Record the
fl
ow rate. Reset the
accumulated data before sampling. See pump and
calibrator operating instructions.
1
When calibration is completed,
disconnect the calibrator and tubing
from the calibration adapter. Remove
the calibration adapter from the
impactor. Remove the representative
media and replace with fresh media
for sampling.
Use a short length of calibration tubing to connect the inlet of the
calibration adapter to the outlet of a calibrator to form a calibration train.
Unscrew the quick-connect plug. Use tubing with a quick-connect
fi
tt
ing to
a
tt
ach the case (pump) inlet to the outlet of impactor.
Ensure O-ring is installed on the quick-connect
fi
tt
ing before inserting it
into the inlet. Absence of the O-ring can a
ff
ect measurements.
Inlet
Quick-
connect
plug
Inlet line
to pump
Quick-
connect
fi
tting on
tubing
Inlet to
pump
IMPACT
outlet
Calibrator
outlet
Calibration
adapter
