SKC 224-44MTX, Operating Instructions Manual

Page: 22 / 40

Page 20 224-UMTXM Issue K www.skcltd.com
Low Flow Sampling
The standard compensated flow range of the Universal MTX series pumps
is 1000 to 4000 ml/min. To operate at flows in the range 5 to 500 ml/min
an optional low flow adapter / tube holder is required. Low flow adapters
are available for simultaneous sampling using one, two, three or four
sample tubes (refer to the sampling accessories guide on pages 26 and
27 for details). The low flow adapters incorporate throttle valve(s) to set
the low flow rate.
To work with the low flow adapter the pump incorporates a ‘constant
pressure controller’ regulator to provide a constant suction at the outlet
of the low flow adaptor, ensuring stable airflow through the sample tube(s)
once the flow has been set using the throttle valve(s).
To enable or disable low flow mode a low flow mode control is located
beneath the smaller of the two knurled metal cap screws on the top of
the pump.
Unscrew and remove the cap screw, and use the large bladed screwdriver
attachment of the supplied toolkit to unscrew the low flow mode control
anti-clockwise by three turns to enable low flow mode.
To disable low flow mode screw the low flow mode control in fully clockwise.
To Set Up For Low Flow Sampling -
First ensure that low flow mode is disabled as detailed above. Ensure
that the low flow adapter is not connected to the pump inlet hosetail at
this point.