Span Calibration Procedure

 

1. First tap “Zero/Span” and use the “Toggle Zero/Span” button to select Span. 

2. Tap to highlight “Enter Gas Concentration” and tap the “Enter Gas %” button. 

3. Enter the appropriate concentration of the calibration gas (see note on p.15).

4. Begin the flow of gas and allow the readings to come to equilibrium. This occurs when the actual values are not moving in a specific direction, and they display only slight movements up and down. This should take approximately 45 seconds. 

5. At this point, tap to highlight “Run Calibration” and tap the “Run Calibration” button. 

6. The Calibration Timer on the screen will count down, and when it reaches zero the Current gas value will adjust to match the Gas concentration.