61-1004RK/61-0191RK Combustible Gas Detector • 12
NOTE:
Calibrating the CO
2
detector may cause alarms. Be sure to put the controller into
its calibration program or disable external alarms before continuing.
Setting the Zero Reading
1.
Follow the directions in the controller’s operator’s manual for setting the zero reading
(sometimes called the fresh air reading).
2.
When the directions call for exposing the detector to zeroing gas, screw the regulator
into the cylinder, turn the on/off knob counterclockwise to open the regulator, and
allow the gas to flow to the detector for 1 minute before continuing with the
directions.
3.
After setting the zero reading, turn the regulator’s on/off knob clockwise to close the
regulator.
4.
Unscrew the 100% nitrogen cylinder from the regulator.
Setting the Response Reading
1.
Follow the directions in the controller’s operator’s manual for setting the response
reading (span).
2.
When the directions call for exposing the detector to calibration gas, screw the CO
2
cylinder onto the regulator, turn the on/off knob counterclockwise to open the
regulator, and allow the gas to flow to the detector for 1 minute before continuing
with the directions.
3.
After setting the response reading, turn the regulator’s on/off knob clockwise to close
the regulator.
4.
Unscrew the CO
2
cylinder from the regulator.
5.
Remove the sample tubing from the regulator.
6.
Remove the calibration cup from the detector. Leave the sample tubing connected to
the calibration cup for convenience.
7.
Allow the reading at the controller to decrease below the alarm points before
returning the controller to normal operation or enabling external alarms.
NOTE:
If you do not allow the gas reading decrease below the alarm points, then
unwanted alarms may occur.
8.
Verify that the controller display reading decreases and stabilizes at 0.
9.
Store the components of the calibration kit in a safe and convenient place.