Honeywell XNX - Range & Alarms

XNX Universal Transmitter
Section 2 - Installation and Operation
67
Range & Alarms
Warning: XNXUniversalTransmitterscarryingUL/CSAapprovals
thatareconfiguredfordevicesmeasuring%LELwillnotallow
adjustmentstothefullscalevalue.Therangeisfixedat100%.
TheRange&Alarmsoptionappliesonlytounitswith
certicationsotherFthanUL/CSA�
Figure 84. Range & Alarms Menu
Set Range (full-scale)
Rangeissensordependent�TheSetRangeoptionallowsthe
full-scalerangetobesetforthesensorwhichisattachedtothe
transmitter�Thefull-scalerangeisbasedonthecapabilityofthe
sensor�TheselectablerangeforECsensorsisdenedinthe
SelectableRangecolumnofthetableinSection6�3�2�Theselectable
rangeforcatalyticbeadsensorsisdenedintheSelectableRange
columnofthetableinSection6�3�5�
Figure 85. Range Option
WhentheRangeoptionishighlighted,usethe  switches
todecrementorincrementthevalue�Use
✓
toacceptthe
displayedvalueandmovetothenexteld�Whenalleldshave
beenupdated,usethe
switchtohighlightüontherightside
ofthedisplay�Use
✓
toacceptthechanges�
  
✓
Figure 86. Setting the Range Value
Whencomplete,thedisplaywillreturntotheRangeOption
screen�
Set Alarm Values
SetAlarmValuesallowsthevaluesforAlarmDirectionandAlarm
LimitsforbothAlarm1andAlarm2tobeset�
Caution:Alarm1andAlarm2valuesmustbelessthantheUpper
Limitvalue.
UseAlarmDirectiontoestablishwhetherthealarmistobe
triggeredbyrisingorfallinggasconcentrations�Alarmsfor
mosttargetgasesaretriggeredbyrisingconcentrationlevels
butcertaingases;e�g�,oxygen,canbemeasuredfordepletion
levels�WhentheXNXtransmitterisconguredwithmVor
OPTIMAsensorsandthemeaurementunitsareLEL,thealarm
levelsettingislimitedto60%LEL�
Iftheconcentrationofthetargetgasremainsabovethealarm
valuesfor3secondsormore,analarmwillbetriggered�