ENMET MX-48 - Manual (Page 14)

ENMET Corporation MX48 C ONTROL
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4.3.3 Alarm Thresholds
Each of the 3 alarm thresholds can be programmed independently for each channel (see "Channel programming"
menu).
During normal operation a gas alarm is triggered only after a preprogrammed lag time, so as to avoid untimely alarms.
The alarm thresholds can be dealt with in the following ways:
during a normal cycle with manual cancellation
during a normal cycle with automatic cancellation
during a parking cycle
The alarm thresholds are selected based on the detected gases and the corresponding standards in force.
4.3.4 Normal Non-alarm Operation
One minute after turning on and if no test action is performed on the keypad, the control scans all the active channels
in succession and displays the values measured.
For a combustible gas For a toxic gas
Example: Normal Operating Display
Each channel is displayed for 10 seconds.
A channel can be displayed manually by selecting the channel with the + and – buttons. The manual display lasts
for 1 minute.
The Display can return to normal cyclic scanning during this minute, by pressing the + and - buttons
simultaneously. The display then indicates, alternately and 3 times in succession:
For a combustible gas For a toxic gas
Example: Normal Operating Display
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.
Channel 2
XXX ppm CO Channel 1
XX LEL CH4
Channel 2
XXX ppm CO Channel 1
XX LEL CH4