Industrial Scientific Oldham MX52, Commissioning, Operating And Maintenance Manual

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3.2. Switching on the unit
CAUTION
The handling operations and adjustments described in these paragraphs are strictly
reserved for authorized personnel as they are liable to affect detection safety.
To start up the MX52 unit, you must:
- swivel the front panel,
- press the ON/OFF button located to the bottom left-hand side of the FRONT
circuit: see Figures 4 and 26 (item A).
- The display panel then shows, for example:
MX 52 V2.0
The unit then goes into INITIALIZATION mode for one minute. Consequently, all the alarms are
inhibited and the current outputs are 1 mA for the channels in service. The unit then performs a self-
test * on its buzzer and all its night-emitting diodes. At the end of this one- minute period, the
channels in service return to normal operation and the corresponding alarms and relays are enabled.
* The user can carry out a “manual-self test” by pressing the test key at any time (see Fig. 26).
This self-test lasts 20 seconds and the display panel may show the following displays one after the
other, for example:
then
The user can interrupt the self-test cycle before it is completed by pressing the
ACKNOWLEDGEMENT key.
MX 52 v2.
φ
xx LEL CH4
*** SELF-TEST ***
xx LEL CH4
Line corresponding to
the channel displayed
when the ENTER key
was pressed