Honeywell E3Point - Detection Ranges and Alarm Levels; Sensor over Range

28 E
3
Point Network Gas Monitor User Manual
Specications
Detection Ranges and Alarm Levels
Gas Detected Range Alarm A Alarm B Alarm C
Maximum
Overload
CO Carbon monoxide 0-250 ppm 25 ppm
100 ppm
225 ppm 500 ppm
H
2
S Hydrogen sulfide 0-50 ppm 10 ppm 15 ppm 20 ppm 150 ppm
NO
2
Nitrogen dioxide 0-10 ppm 0.7 ppm 2 ppm 9 ppm 1000 ppm
O
2
Oxygen 0-25 %vol 19.5 %vol. 22 %vol. 22.5 %vol 100 %vol
COMB Combustibles 0-100 %LEL 25 %LEL 50 %LEL 90 %LEL 100 %LEL
Maximum Overload is the cell exposure to gas concentration that may
result in permanent damage to the cell.
Sensor Over Range
• Sensor over range occurs whenever the detected gas
concentration level is higher than the full scale value of the
sensor.
• When an over range condition occurs, the LCD displays
“OVRRANGE” and the buzzer sounds for 50 milliseconds once
every 10 minutes.
• The LED blinks once per second normally but twice per second
during an over range condition.
• When the gas concentration falls back within the full scale range
of the cell, the buzzer is silenced and the LCD displays the
current concentration.
• On network units (301C systems, for example), the over range
warning states are available through warning flag #Z when
connected to a BACnet building automation system. Over range
warning states are available through the reliability property of
the sensor analog input object (AIO).
• After an over range occurrence, the LCD will display an asterisk
appended to the concentration level in this form:
xxxPPM
*
where “xxx” is the current gas level. For combustible and oxygen
sensors, this will appear as “xx.x%*”, where “xx.x” is the percent
of full scale.