Transmitter; Flammable Gas Sensors - Honeywell Sensepoint XCD RFD Technical Handbook

Sensepoint XCD RFD Technical Manual

4.1 Transmitter

The transmitter enclosure has three threaded entries. The two cable entries either side
of the upper part of the transmitter housing are for connecting the power source, signal
output and relay contacts to associated signalling equipment. The bottom entry allows
local (direct) mounting of the appropriate sensor, or cable entry when using a remotely
mounted sensor. These three entries are ¾" NPT for the Americas. For Europe and most
other regions of the world, the two cable entries are provided with an M20 thread and the
bottom entry is M25 for the sensor.
A local LCD provides gas type, concentration, alarm and operating status. The display
provides numerical, bar graph and icon information.
Diagnostic information may also be displayed when the transmitter is interrogated using
a magnet. The transmitter cover has a glass window which allows use of the Magnetic
Wand to activate the three user interface magnetic switches that are located on the front
of the display module. The magnet also enables a non intrusive, one-man calibration and
configuration facility for the Sensepoint XCD RFD.
Magnetic
MENU/ENTER
Switch
Full Scale
Bar Graph
Gas Type
Gas Reading
Magnetic
DOWN
Switch
Diagram 2: Sensepoint XCD RFD Display and Magnetic Switches

4.2 Flammable Gas sensors

Sensepoint XCD RFD is designed to work with the flammable sensors from the
Sensepoint XCD, 705 and Sensepoint sensor ranges. Sensepoint XCD sensors use NDIR
infrared and electro-catalytic technologies. The Sensepoint XCD range is ATEX approved
for use throughout Europe and many parts of the world.
Please refer to chapter 15 'Ordering information' for more detail information.
Magnetic Wand
activation Icon
XCD RFD
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Calibration Icon
Test Pass Icon
Warning/
Fault Icon
Inhibit Icon
Alarm Icon
Measuring
Units
Magnetic
UP Switch