9-2. Preparing for a Span Adjustment (Gas Bag)
This section describes how to prepare for calibration if you are using a calibration kit that includes:
• Gas bag with a tubing clamp
• Fixed flow regulator
• Calibration cylinder
1. Empty the gas bag.
2. Connect the bag’s tubing to the fixed flow regulator’s hose barb fitting.
3. Screw the fixed flow regulator onto the calibration cylinder.
4. If your regulator has a knob, turn the knob counterclockwise to start the flow of gas into the gas bag.
5. Allow the gas to dispense until the gas bag is a little over half full.
6. If your regulator has a knob, turn the knob clockwise to stop the flow of gas.
7. Clamp the gas bag tubing shut.
8. Remove the tubing from the fixed flow regulator’s hose barb fitting.
9. Remove the fixed flow regulator from the calibration cylinder.