Honeywell VA201T Calibration Handbook page 117

15. Apply the span gas to the sensor using the calibration gas flow housing. The live gas reading is displayed.
When the reading is stable, use '✓' to confirm span calibration.
16. If the sensor cell has been replaced the following display may be shown.
17. Use 'ST' to select 'YES' if the sensor cell has been replaced or 'No' if it has not been replaced.
WARNING
Answer Yes to "CELL/rEPL" ONLY in cases where the "Serviceable Sensor Cell Replacement" procedure was
been performed. Answering Yes in cases where the cell has not been replaced could result in the inability of
the Series 3000 to recognize an old cell with an inadequate output.
It is recommended to bump test the sensors frequently to ensure proper operation.
18. If the sensor cell has been replaced use '✓' to confirm the gas reading.
19. If the span calibration is successful the instrument will briefly display 'SPAn PASS' (if fails 'SPAN FAIL'
displayed and returns to menu mode).
NOTE
4HE CALIBRATION DUE WARNING COUNTER IS RESET AFTER A SUCCESSFUL CALIBRATION
20. The display alternates between "Pur GAS" and the gas reading to indicate that the unit is expecting the
span gas to be removed from the sensor.
21. Promptly switch off the calibration span gas and remove the calibration gas flow housing from the sensor
to allow the gas to disperse.
22. When the reading falls below 50% of the calibration gas level the display indicates a countdown (up to
180 seconds dependant on gas type).
23. When the countdown is finished, the calibration procedure is complete.
24. The instrument returns to the 'SEt CAL' menu. Activate the 'S' or 'T' switch to select another menu or
Series 3000 XPIS
Calibration Handbook
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