Honeywell VA201T Calibration Handbook page 34

Calibration Handbook
Line 4: Displays the function to perform (Set Span) and the span gas concentration value (246 ppm)
4. On the first line, scroll to the device address and press Enter
5. Scroll through the devices to display the desired device* and press Enter to select.
6. The second line displays the device's status
7. Scroll to select the desired function, Set Zero to set the device's zero, and press Enter to select.
8. Upon pressing Set Zero, the controller requests confirmation.
9. Press Enter to confirm or Esc to cancel. If confirmed, the controller sets the S301M's Zero. This takes
only a few moments and the display returns to the default calibration screen.
10. To calibrate the device, scroll to Set Span** and change the span gas calibration value using this
procedure;
11. Using the right arrow, move the cursor to xxx PPM (span value field). Press Enter to select the field
(it is editable when flashing).
12. Use the up or down arrows to increase or decrease the value, press Enter to validate the new value.
13. Move the cursor back to Set Span and press Enter to start the calibration.
The device Span is being calibrated. The screen will display the device's status as "In calib..." until the calibration
is complete.
*The device must be configured in the 301C's database in order to be included in the device addresses
displayed on screen.
**When selecting Set Span, make sure that the device has been supplied with the appropriate calibration gas
before and during the calibration process.
Calib 121 301W
Calibrate Zero?
Set Zero
Set Span 246
Calib 121 301W
Status: Normal
Set Zero
Set Span 246
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PPM
PPM
VA301W Wireless Transmitter