Gilian
®
BDX
II
ABATEMENT AIR SAMPLING PUMP
Document No. 801863M (Rev A)
11
2.1
INTRODUCTION
Before using the BDX
II
for sampling, the
unit must be properly prepared. This in-
cludes charging and calibrating the unit for
proper flow rate.
When charging the unit make certain that
the unit is fully charged. This provides the
unit with enough charge to complete a full
period of sampling. Follow the general
instruction provided in Section Three, as
well as the specific instructions provided
with the particular charging device used.
CAUTION
When charging the device, make certain the
AC outlet is nearby and readily accessible.
The BDX
II
should be calibrated before
and after each day of sampling. Calibration
should be performed using either an elec-
tronic bubble meter (e.g., Gilibrator-2), or
a precision rotameter that has been cali-
brated against an electronic bubble meter.
When a sampling train requires the use of
an unusual combination of sampling me-
dia (such as a glass fiber filter preceding
an impinger), these sampling media
should be installed in-line during calibra-
tion.
2.2
CALIBRATION (FLOW ADJUST)
To ensure proper operation of the BDX
II
Abatement Air Sampling Pump, the unit
should be properly calibrated prior to sam-
pling.
The calibration (flow adjust) is recom-
mended using a Gilibrator-2 precision
electronic flowmeter. If you use a preci-
sion bubble meter other than the Gilibra-
tor-2, make certain you follow the instruc-
tions that came with your device.
Refer to Figure 2.1 and calibrate the pump
as follows:
1)
Make certain the unit is properly
charged.
2)
Using a small Phillips screwdriver,
back out the holding screw just
enough so the anti tamper cover plate
can be rotated 180
°
. This exposes the
On/Off switch and the flow adjust
screw (See Figure 1.1).
3)
Assemble the cassette filter holder for
the sampling media. Use the appropri-
ate filter for the sampling method.
Compress the cassette by using a me-
chanical press or other means of ap-
plying pressure. Use shrink tape
around the cassette to cover joints and
prevent leakage. If a cassette adapter
is used, make certain it does not come
in contact with the backup pad.
SECTION TWO
OPERATION
