3.1.3 On/Off switch
The On/Off switch is used to turn power on and off to the transmitter and sensor. Since the
transmitter’s housing must be opened to access the On/Off switch, the area where the
transmitter is located must be de-classified prior to using.
3.1.4 Setup button
The Setup button provides access to the Millennium transmitter’s main menu, which in
turn allows options to be reviewed and set. The Setup button is also used to zero the
sensor. Since the transmitter’s housing must be opened to access the button the area
must be de-classified before using. Refer to Chapter 4 for instructions on programming the
Millennium transmitter.
3.1.5 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
setup button but in a non-intrusive manner. The magnet comes permanently attached to
the side of the transmitter.
3.1.6 Current output check
Current output check test jacks are provided to facilitate current loop measurements
without breaking external current loop. To take current loop measurements, ensure wiring
is correct and current loop is closed, and then follow steps below
• Set meter on mA scale and insert meter leads into test jacks.
• Put external devices in bypass, if necessary, to avoid unwanted alarm response.
• Perform simulated tests to check output.
• Remove meter leads from test jacks and return external devices to normal.
Operation
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