2�4�2 Lcd And Led Test; Installation And Operation 2�4�3 Xnx Ir Units Configured For Searchline Excel - Honeywell XNX Technical Manual

XNX Universal Transmitter
Note: Calibration of sensors attached to the transmitter is mandatory
before the sensor can be used for gas monitoring. Refer to Section
3 - Calibration for the procedure.
Note: For initial commissioning, refer to EN 60079-29-2.
2.4.2 LCD and LED Test
The LCD and LED test is performed in the initialization after
powering on� All LCD pixels and LEDs (red, green, and yellow)
are turned on for 1�5 seconds� The LCD then goes blank and the
LEDs turn off�
2.4.3 XNX IR Units Configured for Searchline Excel
When powering the transmitter fitted with a Searchline Excel
sensor, the following procedure must be followed to assure
proper installation�
1� Verify that the transmitter is wired correctly according to
this manual and the associated control equipment manual�
2� Apply power to the XNX transmitter� This will in turn
provide power to the sensor�
3� The sensor output will be forced to 2mA (default fault/
inhibit)�
4� The XNX transmitter will enter a boot-up routine, displaying
the initialization screen� The transmitter will load its
operating system, data from the sensor, sensor software
Section 2 - Installation and Operation
version numbers, gas type, the detection range and span
calibration gas level, estimated time to next calibration
due, and self test result� This will take about 45 seconds�
Figure 63. XNX Initialization and General Status Screens
In the final stages of boot-up, warnings and faults
may be observed until the user performs the proper
configuration, calibration, and reset activities
described in the following sections� See Section 5 for
descriptions of warnings and faults�
5� When the XNX completes boot-up, perform a soft reset
(see Section 3�6 Soft Reset) on the Excel sensor from the
Calibration Menu� When the soft reset is intitated, the RS-
485 communication will be temporarily interrupted and
faults F120 and/or F161 may be observed� The RS-485
communication will be re-established in a few minutes and
the faults will automatically be reset in the Non-Latching
mode� F120 and/or F161 must be reset manually in the
Latching mode�
6� Set the Path Length for the application, then align the
transmitter and receiver (see Section 3�5 Align Excel)�
7� Once the alignment is complete, a Zero Calibration
must be performed on the Excel sensor to complete
the commissioning process� (See the Searchline Excel
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