S301M CALIBRATION PROCEDURE
1
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S301M_Calibration_Procedure_R02
The unit requires minimum warm-up time of fifteen (15) minutes before being put into service and
calibrated. Calibration of this unit must be completed using the 301M (see 301M Calibration Procedure) or
using the 301C controller menus (see instructions below).
CONNECTING THE HARDWARE
1. Plug the calibration adaptor onto the gas sensor inlet on the unit.
2. Screw the regulator to the appropriate calibration gas cylinder (for either span or zero adjustment) and
set the flow rate (see Table I).
3.
Connect the tubing to the regulator outlet and to the calibration adaptor (Figure II).
REMOTE CALIBRATING THE S301M SENSOR
When using the S301M in a network of sensors, connected to a 301C controller (with firmware 3.0 or
higher), it is possible to perform a “remote calibration” using the 301C menu:
Note: If the device is reading 0ppm, it is not necessary to adjust the zero. You can proceed to the span
calibration. Remember to use Nitrogen whenever adjusting the unit’s zero.
7. Network
Statistics
Calibration
1. Using the navigation arrows, access the 301C’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:
Calib 007
S301M
Status:
Normal
Set Zero
Set Span
246
PPM
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’s status
4. Scroll to select the desired function, Set Zero to set the device's zero, and press Enter to select.
Calib 007
S301M
Calibrate Zero?
Set Zero
Set Span
246
PPM
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.
* The display can also indicate a calibration error. If an error occurs, begin the process again from step 1.