Emerson Net Safety MLP-A-SC1100, User Manual, Page: 25 / 56

Operations Manual
FGD-MAN-0047 January 2017
15
5.1 Calibration button
The Calibration button provides access to the Millennium’s main menu,
which in turn allows calibration and options to be reviewed and set.
Refer to
Figure 5-1 Controller functionality for more information.

Press and hold the Calibration button to calibrate and access the
main menu.

Briefly press to make a selection (select YES?).
Do not open the controller in a classified area (Do not open when an
explosive atmosphere may be present). Do not power up the system
with the housing cover removed unless the area has been de-classified.
5.2 Magnetic reed switch
The magnetic reed switch is provided to avoid opening the housing in
an environment where gas may be present. The magnetic reed switch
functions in the same manner as the Calibration button, but in a non-
intrusive manner. Refer to
Figure 5-1 Controller functionality for
more information.
When using the magnet:
Place and hold the magnet to the controller’s housing (10 o’clock
position) to calibrate and access the main menu.
Briefly place the magnet to the Controller’s Housing (10 o’clock
position) to make a selection (select YES?).
5.3 Current loop measurement
(test jacks)
Use a standard meter to measure current loop during various states.
The controller’s housing cover must be removed to access the test
jacks.
Refer to Table 5-1 for a detailed list and Figure 5-1 Controller
functionality ,
for more information.
5.4 Power up
Turn the power switch on. A 90 second warm-up routine will begin. The
display reads Start Delay Millennium Net Safety, the Status LED flashes
slow red, and the current output displays 3.0 mA.
When power is applied, the system is automatically tested to ensure
proper functionality.
After warm-up, the controller will enter normal operation, the display
reads 00 %LEL, Status LED will blip/blink green, and analog output will
change to 4.0 mA.
5.5 Status LED
The status LED will remain solid, flash, blip, and/or blink, either red or
green, to indicate various states. Refer to
Table 5-1 Status LEDs,
Display messages, and current loop .