SKC Limited Universal Pump Step By Step Guide - Manual (Page 6)

Page 4 224-G3 Issue C www.skcltd.com
Inhalable Dust Sampling using the I.O.M. Sampler
type rotameter is usually marked with a number
of dots. The dots give indication that the float
is spinning in the airflow, thus showing that it
is not touching the walls of the rotameter tube
which could affect the accuracy of the reading.
Note that the rotameter must be placed onto a
flat, level surface to ensure that the float does
not touch the sides of the rotameter tube.
2
2
1
1
5
0
5
0
2
2
1
1
5
0
5
0
Read Here Read Here
Ball Type Float Type
4. The I.O.M. sampler with filter fitted is placed
onto the foam sealing pad on the top of the
calidaptor. Secure the I.O.M. sampler to the
calidaptor using the finger screw, ensuring a
good seal of the front face of the I.O.M. sampler
to the foam pad. The hosetail fitting supplied
with the calidaptor is screwed into the hole in the
bottom of the calidaptor. The calidaptor hosetail
is connected to the hosetail on the Defender
primary calibrator marked ‘Suction’, with the
length of tubing supplied with the calidaptor.
Turn on the Defender primary calibrator
and set it to take continuous flow readings.
5. If using a rotameter to set the flow rate, the
calidaptor is designed to screw directly into the
inlet in the top of SKC rotameters. Unscrew the
hosetail fitting supplied with the rotameter, and
screw the calidaptor into the threaded hole in the
top of the rotameter, fastening tightly to ensure
a good seal. If using a non-SKC rotameter, use
the hosetail fitting and length of tubing supplied
with the calidaptor to connect the calidaptor
to the rotameter. Fit the I.O.M. sampler to the
calidaptor and secure with the finger screw.
0
5
0
5
0
5
3
3
2
2
1
1
0
0
6. The pump flow rate is adjusted using the smallest
bladed screwdriver attachment of the toolkit
supplied with the pump. Unscrew and remove
the keypad cover from the pump and switch
on the pump using the on/off switch. Use the
screwdriver tool to turn the adjustment screw
labelled ‘FLOW ADJ’. As the screw is turned
the flow reading on the flow calibrator should
increase or decrease. If this does not happen
check the system for leaks or blockages. One
common cause of lack of flow is by using the
separation papers (usually coloured blue)
sometimes found in boxes of filters, instead of
the filters themselves (usually white). Once the
flow is set to the required level of 2.0 litre/min,
switch the sample pump off.
7. Remove the I.O.M. sampler from the calidaptor
and then remove the filter cassette from the
sampler. Remove the filter paper from the
cassette, and ensure that the cassette inlet
spout and support grid are clean and free of
contamination. Fit the second filter paper into
the cassette. Pre-weigh the filter and cassette,
and then fit the cassette back into the I.O.M.
sampler. Check the flow once again with the pre-
weighed filter and cassette in place and make
any final adjustments needed to bring the flow
to the required level. It is advisable to do this
as quickly as possible to minimise the chance
of collecting anything that may affect the final