Calibration Handbook
101Midas
Span Calibration
1. Use ‘▲’ or ‘▼’ to select the span calibration ‘ SPAn’ submenu and press ‘✓’ to accept.
2. Span calibration icon starts flashing for user to prepare to apply span gas.
3. Inhibit ‘
’ icon is also displayed indicating that no alarm outputs will be generated during this
process.
4. Use ‘▲’ or ‘▼’ to select to select the gas ID code of calibration gas (for multi gas ID sensor
cartridges only) and press ‘✓’ to accept.
5. Use ‘▲’ or ‘▼’ to select if humidified ‘HUm’ or dry ‘drY’ calibration gas is being used.
6. Use ‘▲’ or ‘▼’ to change the value to the concentration of span calibration gas being used.
7. Press ‘✓’ to confirm when ready and the icon goes steady.
8. Apply span gas.
9. The dots on the left of the display indicate progress to a successful span.
10. Display will show the span gas reading and if measured to be stable for an appropriate period
of time will display ‘PASS’.
11. If span calibration is unsuccessful, display will show an error code (see below).
12. Press ‘✓’ to exit.
13. 13. Press ‘▲’ or ‘▼’ to select another submenu.
14. Press ‘X’ to return to set-up, calibration and test menu selection.
15. Press ‘X’ again to return to normal operation
NOTE
The change in the gas bottle icon’s contents gives an indication as to the relative stability of the gas reading.
Code Code Meaning
PASS Successful Calibration
FL:0H Zero Calibration Timeout – Over Range
FL:0L Zero Calibration Timeout – Under Range
FL:0U Zero Calibration Timeout – Unstable
FL:SH Span Calibration Timeout – Over Range
FL:SL Span Calibration Timeout – Under Range
FL:SU Span Calibration Timeout – Unstable
Calibration Stability
Icons
Stable
Over - Range
Unstable - Rising
Unstable - Flat
Unstable - Falling
Under - Range
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