Honeywell XNX, Technical Manual

Page: 136 / 200

XNX Universal Transmitter
Section 6 - Specifications 134
FOOTNOTES ( SEE TABLE ON PREVIOUS PAGE ):
1� Accuracy of reading at default Alarm 1 concentration (typically 10%FS or defined minimum alarm level setting, whichever greater) when operated at default full scale�
2� System conditioning may be required to achieve stated results� Contact Honeywell Analytics for details�
3� Measured using calibration flow housing at calibration flow rate (300-375 ml/min) with dry gas�
NOTES ( SEE TABLE ON PREVIOUS PAGE ):
• Data taken at ambient conditions of 20°C, 50% RH�
• Data represents typical values of freshly calibrated sensors without optional accessories attached�
• Performance figures are measured by test units calibrated at 50% of full scale�
• Standard temperature range for XNX EC Sensors is -20°C to +55°C; ATEX, IECEx�
• Extended temperature ranges for the XNX EC Sensors are -40°C to -20°C
• Accuracy between the temperatures of -40°C and -20°C is ±30% at the applied gas concentration�
• Operating the XNX EC Sensors at extended temperature ranges for a prolonged time period exceeding 12 hours may cause deterioration in sensor performance and shorter
sensor life�
• Barometric pressure effects on the O
2
sensor: The output from the O
2
sensor has pressure effects of <0�1% change of output per % change in pressure� When the barometric
pressure changes by ±20% the output from the O
2
sensor changes <±0�4%Vol� However, the oxygen sensor shows transient behavior when subjected to a rapid change in
ambient pressure due to either weather or altitude� For example, a 10KPa instantaneous positive pressure step change may cause an overscale alarm condition for a period
of about 12 seconds�
• Recalibration is recommended if the temperature of local environment has varied by more than ±15°C from the temperature of calibration�
• Response times may increase at lower temperatures�
• Contact Honeywell Analytics for any additional data or details�