Specifications

16
3.3.3.2 Sensor Type
Figure 3-26 Sensor Type
This display example shows that the sensor on channel 01 has been configured as a Carbon Monoxide sensor. The valid entries for the sensor type are:
1 Carbon Monoxide (CO)
2 Nitrogen Dioxide (NO2)
3 Combustible  (EX)
0 None (---)
Setting the sensor type to 0 (zero) will cause the display to ask if the user wants to DELETE the sensor. If the answer is yes, the configuration record for this sensor channel will be deleted
and the channel will no longer be used to control the ventilation system. When a sensor’s type is changed, the alarm level, warning level and range will be set to the default for the sensor
type.
The following three parameters are not accessible until a sensor type of 1, 2 or 3 is selected.
3.3.3.3 Alarm Set Point
Figure 3-27 Sensor Alarm Level
The default alarm levels for the sensors are:
- Carbon Monoxide 200ppm
- Nitrogen Dioxide 5.0ppm
- Combustible10%LELformethane
Setting an alarm level of 0 (zero) will disable alarm detection for this particular sensor.
3.3.3.4 Warning Set Point
Figure 3-28 Sensor Warning Level
The default warning levels for the sensors are:
- Carbon Monoxide 200ppm
- Nitrogen Dioxide 5.0ppm
- Combustible10%LELformethane
Setting a warning level of 0 (zero) will disable warning detection for this particular sensor.
3.3.3.5 Range
Figure 3-29 Sensor Range
The range for each sensor is the gas concentration that corresponds to the 20mA signal level.
The default range values for the sensors are:
- Carbon Monoxide 200ppm
- Nitrogen Dioxide 20ppm
- Combustible50%LEL
3.3.4 Configure Relays, Horn & Strobe Submenu
There is a list of parameters for each relay in the system. The left and right cursor keys can be used to move from one relay, horn or strobe to another and the up and down keys will scroll
through the parameters for the particular relay, horn or strobe.
3.3.4.1 Relay Summary
Figure 3-30 Relay Summary
This display example shows that Relay 1 is configured to operate Normally Off, with a turn on delay and a minimum on time.
Notice that the relay number, 1 in this example, is underlined. This indicates that the digit keys can be used to jump to a particular relay, horn or strobe. The relays are numbers 1, 2 and 3;
the horn is number 4 and the strobe is 5.