M2A-XL Transmitter Operator’s Manual
Chapter 2: Description
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23
Control Buttons
The M2A-XL includes three push button switches that allow you to enter the M2A-XL’s
operating modes, navigate through the modes, update settings, and save changes to the settings.
The push button switches are located along the bottom edge of the control PCB (see Figure 12).
The UP/YES button is on the left, the DOWN/NO button is in the middle, and the ENTER button
is on the right.
Just above each push button switch is a magnetic switch with the same function as the push button
switch below it. The magnetic switches are for use in non-intrusive calibration. They are actuated
by bringing the magnetic wand close enough to them to actuate them. Although the magnetic
switches have the same functions as the push button switches, it is not practical to use them for
operations other than calibration because it is not possible to actuate two magnetic switches at
once with only one magnetic wand. Since displaying the Information Screen only requires the use
of one switch, the wand may be used to show the Information Screen (see “Information Screen”
on page 41).
Status LEDs
The M2A-XL includes five status LEDs that are located above the display (see Figure 12).
• Fail LED
The fail LED turns on when the M2A-XL is experiencing a fail condition. A fail condition
can be caused by a detector failure or low detector signal.
Table 8: M2A-XL Control Button Functions
Switch
Function
UP (YES)
• Saves settings
• Changes the displayed setting
• Enters the Calibration Program
• Enters Gas Type Mode (press with DOWN/NO
button)
• Enters Configuration Mode (press with ENTER
button)
DOWN
(NO)
• Cancels setting changes
• Changes the displayed setting
• Enters Gas Type Mode (press with UP/YES
button)
• Enters Modbus Mode (press with ENTER
button)
• Displays the Information Screen
ENTER
• Initiates operations
• Enters Configuration Mode (press with UP/YES
button)
• Enters Modbus Mode (press with DOWN/NO
button)
• Functions as an alarm reset switch
