Honeywell VA201T Calibration Handbook page 16

Calibration Handbook
3. Adjusting the Zero (if required)
When the unit indicates 0 %/ppm in an area with no presence of the target gas, proceed to step 4.
Turn on the regulator.
The calibration zero gas is now flowing into the unit.
Wait for 2.5 minutes minimum to allow the reading to stabilize.
Place the magnet on top of Menu.
Then place it above Up or Down arrow until the password VA is reached.
Place the magnet on top of Menu to acknowledge.
Place the magnet on top of Up or Down arrow until the Set Zero field is reached.
Place the magnet on top of Menu to acknowledge.
Place the magnet on top of Menu to activate GoCalib.
Wait message appears, the transmitter will go into zero calibration.
The calibration procedure is finished when the Menu Set Zero message appears.
Place the magnet on top of Up or Down arrow until the Quit field is reached.
Place the magnet on top of Menu to confirm.
4. Adjusting the Span
Turn on the regulator.
The calibration span gas is now flowing into the unit.
Wait for 2.5 minutes minimum to allow the reading to stabilize.
Place the magnet on top of Menu.
Then place it above Up or Down arrow until the password VA is reached.
Place the magnet on top of Menu to acknowledge.
Place the magnet on top of Up or Down arrow until the Set Span field is reached.
Place the magnet on top of Menu to acknowledge.
Place the magnet on top of Up or Down arrow to select the proper gas value multiplied by the conversion
factor, if needed.
Once the span gas value is selected, place the magnet on top of Menu to acknowledge.
When GoCalib? Is displayed, place the magnet on top of Menu to start the calibration.
Wait message appears, the transmitter will go into auto calibration mode.
During the calibration, Set Span and gas reading are displayed
The calibration procedure is finished when the Menu Set Span message appears.
Place the magnet on top of Up or Down arrow until the Quit field is reached.
Place the magnet on top of Menu to exit.
16 VA301D2 / GasPoint II