14
65-2643RK-05-04 M2A Transmitter Operator’s Manual
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 22).
Status LEDs
The M2A includes five status LEDs that are located above the display (see Figure 5).
•
Fail LED
The fail LED turns on when the M2A is experiencing a fail condition. A fail condition can be caused by a
detector failure or low detector signal.
•
Alarm 1 LED
The alarm 1 LED is on when the M2A is experiencing an alarm 1 condition.
•
Alarm 2 LED
The alarm 2 LED is on when the M2A is experiencing an alarm 2 condition.
•
RX & TX LED’s
These LED’s indicate data being received (RX) and transmitted (TX) when the M2A’s Modbus output is
operating.
Table 2: M2A 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
