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

Ingress Protection	IP66/67
Product Type	Universal Transmitter
Enclosure Rating	IP66/67
Display	LCD
Communication Protocols	HART, Modbus, Foundation Fieldbus
Power Supply	24 VDC nominal, 18-32 VDC
Operating Temperature	-40°C to +65°C (-40°F to +149°F)
Material	Aluminum or Stainless Steel
Gas Types	Toxic, Oxygen, and Combustible gases
Output	4-20 mA
Relays	3 programmable relays
Approvals	ATEX, IECEx, UL, CSA
Sensor Compatibility	Electrochemical, catalytic, infrared, and other sensor types