Calibration Handbook
28 VA301M / S301M
4. Adjusting the Span
Turn on the regulator and inject span gas at the specified flow rate.
The span gas is now flowing into the unit.
Wait 2 minutes before starting the Set Span calibration.
Press the Enter key, and using the Scroll key enter the VA password.
Using the Scroll key select Zone 1 (built-in CO sensor) or Zone 2 (remote sensor) and press Enter.
Scroll to get the Set Span menu and press Enter to go in.
Using the Scroll and Enter key, input the concentration of span gas that’s going to be used.
Wait will be displayed on the screen until calibration is completed.
Scroll until Back is displayed, press Enter.
Scroll until Quit is displayed, press Enter to exit.
S301M Calibration Procedure
1. Warm-Up Period
Turn the unit on for a minimum of fifteen (15) minutes.
2. Connectiing the Hardware
Screw the regulator to the appropriate calibration gas cylinder.
Adjust the regulator with a flow rate of according to specification.
S301M CALIBRATION INFORMATION
Gas Scale Warm-up Flow Rate
CO 0 - 255 ppm 15 min 0.5L/min
NO2 0 - 10.2 ppm 15 min 0.5L/min
C3H8 0 - 25.5 % Vol 15 min 100 ml/min
Combustibles 0 - 102 % 15 min 100 ml/min
Connect the regulator outlet to the sensor as shown on.
or
58 Liter
Calibration
Gas Cylinder
103 Liter
Calibration
Gas Cylinder
Calibration cap
S301M Calibration Equipment
3. Remote Calibrating the S301M Sensor
When using the S301M in a network of sensors, connected to a VA301C controller (with firmware 3.0 or
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