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Only if
Relay
option Installed
Relay
Dly 0min
Relay
Test OFF
Use <UP> or <DOWN> to change the Relay Delay time within the limits. The
delay time may be set from 0 to 9 minutes in 1 minute increments to prevent
false alarms. The default is 0 minutes (no delay).
Use <UP> or <DOWN> to toggle the relay ON or OFF to test the relay
operation. Press <MENU> to reset to OFF and advance.
14. RELAY DELAY
15. RELAY TEST
<MENU>
Press to advance to next menu item
<MENU>
Press to advance to next menu item
<MENU>
Press to advance to next menu item
<MENU>
Press to advance to next menu item
Calibrat
1000 ppm
Cal Ref
1000 ppm
This item is used to calibrate the CO
2
sensor by applying 1000 ppm CO
2
calibration
gas directly to the sensor. Consult the calibration instructions for the detailed
procedure.
After applying the gas for several minutes, hold either the <UP> or <DOWN>
key for 5 seconds to start the gas calibration. The display will blink during the
calibration time (approximately 10 seconds).
The display will change to “Calibrat / Done” when the calibration is complete. The
display may indicate “Calibrat / Fail” if the calibration fails.
The calibration reference screen allows user to set the calibration gas level used
for calibrating the sensor. Use <UP> and <DOWN> to adjust the ppm value of
calibration gas. The minimum value is 400ppm, the maximum value is 2000ppm.
Increment value is 50ppm for each step. Press <MENU> to save and advance. If no
calibration gas is available exposing the sensor to fresh outside can be used and
calibrate with 400PPM value. Another method is to determine the CO2 ambient
level using a calibrated unit as a reference and adjust calibration setting to desired
value
<MENU>
Press to advance to exit the Setup Menu and return to normal mode
17. CALIBRATE
16. CALIBRATE
CALIBRATION
Calibration with gas requires a field calibration kit with pressure regulator, tubing, sensor adapter and
bottle of CO
2
gas. The certified calibration gas is applied directly to the CO
2
sensor to perform a gas
calibration.
Ensure the regulator knob is turned off and then hand tighten the regulator to the CO
2
gas bottle. A
length of tubing should be connected between the regulator output and the sensor adapter hood.
Remove the cover of the device to be calibrated to expose the gas sensor. Carefully install the sensor
adapter hood over the CO
2
sensor on the PCB. The adapter should fit snuggly and securely over the
sensor and remain in place during the entire calibration cycle. This will ensure a stabile ppm CO
2
environment during calibration. Turn the regulator knob on to allow gas to flow to the sensor. The CO
2
reading on the LCD will begin to approach ppm level of calibration gas . Wait 3 to 5 minutes until the CO
2
reading stabilizes.
Enter the Setup Menu and use the <MENU> key to advance to the “Calibrat” item. Press and hold either
the <UP> or <DOWN> key for 5 seconds to start the gas calibration. The LCD will indicate “Calibrat
/ Done” if the process was successful. If “Calibrat / Fail” is displayed then the process may have to be
repeated. Press the <MENU> key to return to normal operation, shut off the gas supply and remove the
sensor adapter.
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IN-GE-CD2DTXXX-03
