ENMET MX-52 - Manual (Page 16)

ENMET Corporation MX52 C ONTROL
12
5.1.2 Switching the MX52 C ONTROL On
To start up the MX52 C ONTROL :
Swivel the front panel.
Press the ON/OFF button located to the bottom left-hand side of the FRONT circuit: see Figures 4 and 10 (item A).
The display panel then shows, for example:
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 light-
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 Figure 10).
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 switch.
N OTE : In some applications, slight electronic noise between the Sensor/Transmitter and the Control can cause
fluctuations in the display reading. These minor fluctuations are considered to be insignificant in terms of the
range, detection limit and alarm values of the gas being monitored.
5.2 Operating Modes
5.2.1 Audio Alarm (Buzzer)
In normal operation, the audio alarm is triggered whenever a fault or an alarm threshold is exceeded. The audio alarm
can be stopped by pressing the ACKNOWLEDGEMENT switch or by remote acknowledgement. The buzzer makes a
continuous or pulsed sound, according to the programming of the control, when an alarm threshold is exceeded.
ENMET
MX48/52 V2.0r12
Channel 1
XX ppm Cl2
******* SELF-TEST ******
XX ppm Cl2
Line corresponding to
the channel displayed
when the ENTER switch
was pressed