10 • 61-1001RKSS Hydrogen Detector
Calibration
This section describes how to calibrate the hydrogen detector. It includes procedures to
prepare for calibration, set the zero reading, set the response reading, and return to
normal operation.
WARNING: The controller is not an active gas monitoring device during the calibration
procedure.
NOTE:
The following procedure assumes the use of a calibration kit which includes a
calibration gas cylinder, a 0.5 LPM fixed flow regulator with an on/off knob, a
calibration cup for the detector, and a short piece of sample tubing to connect the
regulator to the calibration cup.
Preparing for Calibration
1.
Screw the calibration cup onto the bottom of the detector.
2.
Screw the regulator into the calibration cylinder.
3.
Use the calibration kit sample tubing to connect the regulator to the calibration cup.
4.
Place the controller into its calibration program or disable external alarms.
NOTE:
Calibrating the hydrogen detector may cause alarms. Be sure to put the controller
into its calibration program or disable external alarms before continuing.
Setting the Zero Reading
NOTE:
If you can verify that the hydrogen detector is in a fresh air environment, you do
not need to apply zero air to the detector before adjusting the zero reading.
1.
Follow the directions in the controller operator’s manual for setting the zero reading.
2.
When the instructions call for applying zero air to the detector, turn the regulator’s
on/off knob counterclockwise to open it.
3.
Allow the gas to flow for one minute.
4.
Set the zero reading according to the controller operator’s manual.
5.
Turn the regulator’s on/off knob clockwise to close it.
6.
Leave the sample tubing connected to the regulator and the calibration cup.
Setting the Response Reading
1.
Follow the directions in the controller operator’s manual for setting the response
reading (span).
2.
When the directions call for exposing the detector to gas, turn the regulator’s on/off
knob counterclockwise to open it.
3.
Allow the gas to flow for one minute before continuing with the directions.
4.
After setting the response reading, turn the regulator’s on/off knob clockwise to close
it.
