SKC Limited Universal Pump Step By Step Guide - Manual (Page 16)

Page 14 224-G3 Issue C www.skcltd.com
(Connect from the impinger to the in-line trap with
a length of flexible tubing. It does not matter which
way around the in-line trap is connected).
3. Fasten the bracket to the front of the Universal pump
using the two screws supplied with the pump. Place
the trap and the impinger into the bracket. (Place
the impinger and in-line trap on a suitable surface).
4. Remove the top of the impinger and fill it to the
desired level with some of the liquid intended to be
used for the sample. Connect with flexible tubing
between the sample pump inlet hosetail and the
pipe stub protuding from the side of the trap.
5. It is important to make sure that the sample pump
is set to 1.0 litre/minute BEFORE switching it on.
If the pump is set to a higher flow rate the liquid
contained in the impinger may well be sucked out
and into the trap or pump. Connect with a length
of tubing between the impinger and a calibration
device. Using the toolkit, adjust the flow adjuster
screw on the pump (labelled ‘FLOW ADJ’). As the
screw is turned the flow reading should increase or
decrease. If this does not happen check the system
for leaks or blockages. Once the flow rate is set
to the required level switch the sample pump off.
0
5
0
5
0
5
3
3
2
2
1
1
0
0
6. Renew the liquid in the impinger, filling to the
correct level as advised in the method you
are following. The complete unit can now be
placed in the work place and switched on.
(Mount the sample train [comprising the sample
pump, tubing, sorbent trap, impinger and pouch]
onto the worker who is to wear it during the
sample. A length of tube should be run from the
impinger to a position as close to the breathing
zone as is practical and comfortable. The pump
can be either clipped to a belt or placed into a
pouch. Note that the connecting tube can present
a hazard if left to flap around, in much the same
way as a necktie. Measures should be taken
to protect the wearer by clipping or restraining
the tube so that it cannot become caught up in
anything. Once the pump is mounted to the
worker in a satisfactory way it can be switched on).
30cm
Diameter
Breathing
Zone
Impinger
& Pouch
Pump
Trap
IMPORTANT: The start time of the sample should
be noted.
7. As the liquid can evaporate quite quickly the impinger
should be checked every 30-45 minutes and topped
up with liquid to ensure the end of the vertical glass
tube inside is always covered with liquid.
8. At the end of the sample switch the pump off, and
note the finish time. Check the flow rate at the end
of the sample. The start and finish times, sample
duration, start and finish flow rates and any other
relevant details of the sample should be noted down
and indexed to the impinger by number or code.
Gas & Vapour Sampling using Impingers