Honeywell VA201T Calibration Handbook page 22

Calibration Handbook
17 Liter
Calibration
Gas Cylinder
17L, 58L or 103L Calibration Gas Cylinder
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.
To adjust the zero, inject zero gas at the specified flow rate.
The zero calibration gas is now flowing into the unit.
Let the gas flow for a minimum of 2.5 minutes.
After 2.5 minutes, the reading should be stabilized.
Press Enter to get into the menu.
Use the Up or Down button until the password VA is reached.
Press Enter to acknowledge.
Use the Up or Down arrow until the Set Zero field is reached.
Press Enter to acknowledge.
Use the Up or Down arrow to select the sensor to be calibrated.
Press Enter to acknowledge.
Press Enter again 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.
Use the Up or Down arrow until the Quit field is reached.
Press Enter to exit.
4. Adjusting the Span
Turn on the regulator.
The calibration span gas is now flowing into the unit.
Let the gas flow for a minimum of 2.5 minutes.
After 2.5 minutes, the reading should be stabilized.
Press Enter to get into the menu.
Use the Up or Down button until the password VA is reached.
Regulator
103 Liter
Span Calibration
58 Liter
Gas Cylinder
Span Calibration
Gas Cylinder
Span
S301D2 Calibration Installation
Calibration cap
Calibration tubing
22 VA301EM