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Description – Det-Tronics PIRECL Infrared Hydrocarbon Gas Detector PointWatch Eclipse User Manual

Page 16

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14

95-8526

14.2

dEScRiption

internal MagnetiC SwitCh
An internal magnetic switch is provided for resetting

latched alarms and initiating calibration. See Figure 19

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 20.

Alternatively, the HART communicator can be connected

across a 250 ohm resistor in the 4-20 mA loop.

NOTE

All Eclipse gas detectors (except EQP models) are
furnished with HART capability. However, 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 15).

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 F in this manual for complete

information regarding HART communication with Eclipse.

CALIBRATION MAGNET

CALIBRATION NOZZLE

WEATHER BAFFLE

MULTICOLOR LED

HART COMMUNICATION PORT

(COVER INSTALLED)

PLACE CALIBRATION MAGNET
HERE TO ACTIVATE INTERNAL
REED SWITCH

C2058

EARTH GND LUG

Figure 19—PointWatch Eclipse

HART COMMUNICATOR CONNECTED
TO I.S. HART PORT

I.S. HART PORT NOT PROVIDED ON THIS MODEL

A2490

Figure 20—Eclipse Models with and without IS HaRt Port