4
Unpacking
Carefully unpack the monitor; each monitor comes with operating instructions, and calibration
certificate
At this point check the front panel of your monitor, the target gas and alarm level will be clearly
shown, if either of them are incorrect contact your supplier.
Power connection
The monitor will operate on voltages from 110-250 VAC/ 50 Hz
Connect the monitor to a permanent power supply, preferably none switched, the unit is supplied
with a mains lead terminated in a molded mains plug, therefore connection is simply a mater of
plugging in to a socket outlet.
If you require to connect your monitor to an existing circuit, this might be necessary where no
socket outlet is present, firstly ensure the mains lead is not connected, isolate the plug so it
cannot be connected accidentally, loosen the two screws holding the lower cover in place,
remove the cover, the mains lead connections can be clearly seen on the right hand side of the
circuit board, (see fig 1) use a terminal screwdriver to loosen the three screws, then loosen the
cable clamp removing the lead through the bottom of the case, give careful consideration to
disposal of the mains lead, if plugged in it could be dangerous.
Connection of your power lead (hard wire) is the reverse procedure ensures the cable you use is
at least 7 mm in overall diameter; smaller cables cannot be clamped properly.
Cable removal and replacement must be done by competent personnel
Fig 1Picture of monitor with cover removed
The Relay connections on the left
