20 • 35-3001-06H-DIL Hydrogen/Oxygen Sample-Draw Detector
Setting the Zero Reading
1. Attach the gas bag tubing to the regulator on the zero air calibration cylinder.
NOTE:
A demand flow regulator cannot be used for calibration.
2. Turn the regulator’s on/off knob clockwise to open it. Fill the gas bag.
3. Turn the regulator’s on/off knob counterclockwise to close it.
4. Clamp the gas bag shut and disconnect it from the fixed flow regulator.
5. Connect the gas bag tubing to the inlet line and release the clamp.
6. Allow the sample-draw detector to draw sample for one minute.
7. Follow the directions in the controller’s operator’s manual for setting the zero reading. If you
used a zero air calibration cylinder to set the zero reading, proceed to step 9. If you verified a
fresh air environment, proceed to the next section, Setting the Response Reading.
8. Disconnect the gas bag tubing from the inlet line.
9. Empty the gas bag.
10. Unscrew the fixed flow regulator from the zero air calibration cylinder.
Setting the Response Reading
1. Screw the fixed flow regulator into the hydrogen calibration cylinder.
2. Attach the gas bag tubing to the regulator on the hydrogen calibration cylinder.
NOTE:
A demand flow regulator cannot be used for calibration.
3. Turn the regulator’s on/off knob clockwise to open it. Fill the gas bag.
4. Turn the regulator’s on/off knob counterclockwise to close it.
5. Clamp the gas bag shut and disconnect it from the fixed flow regulator.
6. Connect the gas bag tubing to the inlet line and release the clamp.
7. Allow the sample-draw detector to draw sample for one minute.
8. Follow the directions in the controller’s operator’s manual for setting the span.
9. Disconnect the gas bag tubing from the inlet line.
10. Empty the gas bag.
11. Unscrew the fixed flow regulator from the hydrogen calibration cylinder.
Returning to Normal Operation
1. Wait approximately one minute to allow the hydrogen reading to stabilize.
2. Follow the instructions in the controller’s operator’s manual to exit the calibration mode.
3. Store the components of the calibration kit in a safe and convenient place.
