Honeywell XNX Technical Manual

XNX Universal Transmitter
Section 4 - Maintenance
105
4.2 XNX
®
EC Sensor Cartridge Replacement
Caution: For toxic sensors, remove the shorting clip from the bottom of the
sensor prior to installation. No shorting clip is provided with oxygen sensors.
Theserviceablesensorallowsreplacementofthecellinside
thesensor�Thesensorcellcanbereplacedwithacellofthe
sametypeorchangedtodetectadifferenttargetgas�Both
proceduresfollow�
Whenreplacingoxygen(O
2
)sensorcells,theinitialwarm-uptime
isbetween10and15minutes�Thiswarm-upisrequiredonly
aftersensorcellreplacement�
4.2.1 Replacing with the Same Cartridge Type
Toreplacethecellfollowthisprocedure:
1�Unscrewtheweatherproofcover,loosenthesensor
retainerlockingscrew,andunscrewthesensorretainer�
2�Removetheoldsensorbypullingwithouttwisting�
3�Unscrewthesensorcap�
4�Removetheoldcellbypullingwithouttwisting�
5�Verifythatthenewcellisthesametypeastheoldone�
6�Plugthenewcellintothesensor,takingcaretoalignthe
sensorpinswiththeconnectorholesinthePCB�
7�Retthesensorretainer,tightenthelockingscrew,and
rettheweatherproofcover�
8�Sensorwarm-upwillbeginandtheXNXdisplaywill
alternatebetweentwoscreens:“Fault151”and“WARM�”

Figure 227. Sensor screens during warmup
9�FollowtheproceduretoacceptthenewsensorinAccept
NewSensorType�
10� RecalibratethesensorfollowingtheproceduresinSection3�2�1�
Transmitter
Sensor Retainer &
Locking Screw
Old Sensor
3
2
1
4
5
6
New Sensor
EC Sensor Removal
Sensor Cap
Old cell
New cell
Sensor Cell Replacement
Figure 228. XNX EC Sensor Cell Replacement

Honeywell XNX Specifications

General

Brand	Honeywell
Model	XNX
Category	Transmitter
Language	English