Sensor Over Range - Honeywell E3Point Manuel D'utilisation

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.
• To clear the asterisk from the display, press the ESC key for 8
seconds.
NOTE: If the system has experienced an over range condition, the sensor
should be bump tested to verify that it still responds to the presence of gas.
It should also be recalibrated at the next maintenance interval. See
Inspection and
32
*
Maintenance.
E Point Network Gas Monitor User Manual
3
Periodic