Det-Tronics PIRECL Infrared Carbon Dioxide Gas Detector PointWatch Eclipse - Manual (Page 14)

12 95-8676 2.1
CALIBRATION MAGNET
CALIBRATION NOZZLE
WEATHER BAFFLE
TRI-COLOR LED
OPTIONAL HART COMMUNICATION
PORT (COVER INSTALLED)
PLACE CALIBRATION MAGNET
HERE TO ACTIVATE INTERNAL
REED SWITCH
E2058
EARTH GND LUG
figure 14—PointWatch Eclipse
HART COMMUNICATOR CONNECTED
TO I.S. HART PORT
C2490
figure 15—Eclipse Models with optional I.S. HARt Port
DeScription
InTernal MaGneTIC SWITCh
An internal magnetic switch is provided for resetting
latched alarms and initiating calibration. See Figure 14
for switch location. Momentary switch activation will reset
alarms, while holding the switch closed for 2 seconds or
longer will start the calibration sequence. The switch can
also be used to enter "live" calibration mode or terminate
the calibration sequence (see "Calibration" section).
harT CoMMUnICaTIon
An optional intrinsically safe HART communication port
provides a non-intrusive means for connecting the HART
Communicator to the Eclipse. Refer to Figure 15.
Alternatively, the HART communicator can be connected
across a 250 ohm resistor in the 4-20 mA loop.
NoTe
A 250 ohm resistor must be present within the
4-20 mA loop for HART communication to work.
In many cases, this resistor is already present in
the control panel. For a bench test or a situation
where the 4-20 mA loop is not active, this resistor
must still be installed for HART communication to
function properly (see Figure 11).
If a PIRTB Remote Calibration Termination Box is utilized,
the HART Communicator can be connected at the PIRTB.
Note that this connection requires removal of the PIRTB
cover.
Connect the HART Communicator, then turn it on by
pressing the ON/OFF key. The communicator will indicate
when the connection is made. If the connection is not
made, the communicator will indicate that no device was
found. Refer to the HART Appendix in this manual for
complete information.
WarnInG
For Division applications, do not open cover when
explosive gas atmosphere may be present.
Refer to Appendix E in this manual for complete
information regarding HART communication with Eclipse.