PAGE 5
The best way to use your Weld Purge Monitor
®
is to connect the
exhaust tube from your purging system to one of the quick fit
connectors on the front of the monitor. Then allow the exhaust
gas to flow freely over the sensor, out to atmosphere using the 6”
length of tube provided.
If that method is not practical, then use the probe and hand pump
to extract samples from the inside of the pipe or vessel. The probe
should be placed through a weld gap near the top of the purge
space and inserted so that the bottom of the probe only goes a
short way below the weld zone for most accurate results.
The weld joint must be taped and your probe inserted through the
tape and into the weld gap.
Should the purge gas exhaust be insufficient to use the monitor with
a free flow of exhaust gas (as described above) and if the vacuum
bulb and sampling probe are used instead, the aspirator bulb will
be attached to one quick fit connector on the front of the purge
monitor, while the sampling probe and tube is attached to the other
connector. (See diagram on next page).
Press the standby button once and the unit will turn on, initially
it will display four dashes on the monitor. This indicates that the
reading is over range (>40.00%).
Follow the full-scale calibration procedure to start using the monitor.
(See page 8).
© HFT
®
UNDERSTANDINg the MONITOR
BEFORE TURNINg ON continued
