ENMET MX-48 User Manual
Page 13
MX48 C
ONTROL
ENMET Corporation
9
4.3 Operating Modes
4.3.1 Buzzer:
During normal operation, whenever there is a fault or an alarm, the buzzer is triggered. The buzzer is stopped by
pressing the
CLEAR
button or by clearing remotely. The buzzer emits a continuous sound when an alarm threshold is
exceeded.
4.3.2 Light-emitting Diodes (LED)
Each channel has 5 LEDs that are visible and labeled on the FRONT panel. See Figure 4.
Table 5: Front Panel LED Indications
LED
Not Lighted
Lighted
Flashing
Green
Channel not in service
Channel in service
Upper Red
AL1 not triggered
AL1 threshold exceeded, with
automatic cancellation
AL1 threshold exceeded, with manual
cancellation, and not cleared
Center Red
AL2 not triggered
AL2 threshold exceeded, with
automatic cancellation
AL2 threshold exceeded, with manual
cancellation, and not cleared
Lower Red
AL3 not triggered
AL3 threshold exceeded on average
or lag, with automatic cancellation
Yellow
No fault
Channel faulty
Channel being calibrated or
programmed
4-20mA open (disconnected)
Figure 4: MX48 C
ONTROL
Front Panel
Previous
Next
Clear
Enter
Figure 4a: Front Panel Keypad Buttons
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.
–
–
–
–
–
–
–
–
TEST /
ENTER
+
+
+
+
+
+
+
+
Buzzer
Front Panel Keypad
See Figure 4a
Display
¼ Turn Latches 2pl
Yellow LED
Red LED, AL3
Red LED, AL2
Red LED, AL1
Green LED