A.1.3 Monitoring functions 
Maintains a record of power ups in the Transmitter Unit. 
Maintains a time-stamped record of faults, warnings and alarms in the Transmitter Unit (history log).
A.1.4  Performance 
TransmitterUnitandCertiedSensorwithoutcartridge.
Accuracy: ±1%FSD-25to55°C(-13to131°F)
Baselinedrift: ±0.5%FSDoverthreemonths
Spandrift: ±0.5%FSDoverthreemonths
Baselinevstemperature ±1%FSD-40to65°C(-40to149°F)
Spanvstemp ±1%FSD-25to55°C(-13to131°F)
Speedofresponse: <0.5sbetweenastepinputandacorrespondingchangeintheoutput.
DigitalelectronicsandsoftwaremeettherequirementsofEN50271:2002,Electricalapparatusforthedetection
and measurement of combustible gases, toxic gases or oxygen – Requirements and tests for apparatus using 
software and/or digital technologies.   
Note: ForperformancespecicationofcompleteApextransmitter+Sensor+Cartridgereferto
section A.2 or data sheet for cartridge
A.1.5  Environmental
Operatingtemperature: -40to65°C(-40to149°F)
UserInterface: -20to65°C(-4to149°F)
Operatinghumidity: 0-99%rh
A.1.6  Storage (excluding cartridge)
Temperature: -40to65°C(-40to149°F)
Humidity: 0-99%rh
A.1.7  EMC
MeetstherequirementsofEN50270(type2apparatus),EMC-ElectricalApparatusforthe
Detection and Measurement of Combustible Gases, Toxic Gases or Oxygen.
APPENDIX A - SPECIFICATIONS