Detection Ranges And Alarm Levels; Sensor Over Range - Honeywell IAQPoint2 User Manual

Specifications

Detection Ranges and Alarm Levels

Gas Detected
CO Carbon monoxide
H S Hydrogen sulfide
2
NO Nitrogen dioxide
2
O Oxygen
2
COMB Combustibles
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.
28
Range Alarm A
0-250 ppm 25 ppm
0-50 ppm 10 ppm
0-10 ppm 0.7 ppm
0-25 %vol 19.5 %vol.
0-100 %LEL 25 %LEL
*
Alarm B Alarm C
100 ppm 225 ppm
15 ppm 20 ppm
2 ppm 9 ppm
22 %vol. 22.5 %vol
50 %LEL 90 %LEL
E Point Network Gas Monitor User Manual
3
Maximum
Overload
500 ppm
150 ppm
1000 ppm
100 %vol
100 %LEL