Honeywell VA201T Calibration Handbook page 29

higher), it is possible to perform a "remote calibration" using the VA301C menu:
1. Using the navigation arrows, access the VA301C's menu
2. Scroll through the menu options and select option 7. Network
3. Scroll through the Network options screens to the last screen and select the Calibration option
The Calibration screen contains four (4) lines of information:
Line 1: Indicates the mode (Calib, meaning calibration), the (Modbus) address of the device to calibrate
(007) and the type of device to calibrate (S301M)
Line 2: Indicates the status (Normal or In calib ) of the specified device
Line 3: Displays the function to perform (Set Zero)
Line 4: Displays the function to perform (Set Span) and the span gas concentration value (246 ppm)
1. On the first line, scroll to the device address and press Enter
2. Scroll through the devices to display the desired device* and press Enter to select.
3. The second line displays the device status
4. Scroll to select the desired function, Set Zero to set the device's zero, and press Enter to select.
5. Upon pressing Set Zero, the controller requests confirmation.
6. 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.
7. To calibrate the device, scroll to Set Span** and change the span gas calibration value using this
procedure;
a. Using the right arrow, move the cursor to xxx PPM (span value field). Press Enter to select the field
(it's editable when flashing).
b. Use the up or down arrows to increase or decrease the value, press Enter to validate the new value.
c. 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 status as "In calib..." until the
calibration is complete.
*The device must be configured in the VA301C'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 exposed to the appropriate calibration gas.
VA301M / S301M
7. Network
Statistics
Calibration
Calib 007 S301M
Status: Normal
Set Zero
Set Span 246
Calib 007 S301M
Status: Normal
Set Zero
Set Span 246
Calib 001 : S301M
Status: Normal
Set Zero
Set Span 200
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Calibration Handbook
PPM
PPM
ppm