Span Calibration - Honeywell Midas User Manual

be displayed).
15. The selected outputs will be inhibited until the
inhibit timeout has elapsed.
16. Press 's' up or 't' down to select another
submenu.
17. Press 'X' to return to set-up, calibration and test
menu selection.
18. Press 'X' again to return to normal operation.
Note
If the inhibit timeout elapses before the inhibit
state is set back to "nonE," the maintenance
fault code m17 will be displayed.
Midas
7.3.2 Span Calibration ' SPAn'
1. Use the 's' up or 't' down buttons to select the
span calibration ' SPAn' submenu and press '3'
to accept.
2. The span calibration icon starts flashing in order
to tell the user to prepare to apply span gas.
3. The inhibit ' ' icon is also displayed indicating
that no alarm outputs will be generated during
this process.
4. Use the 's' up or 't' down buttons to select the
gas ID code of calibration gas (for multi gas ID
sensor cartridges only) and press '3' to accept.
(Refer to Appendix B for details of gas ID codes).
5. Use the 's' up or 't' down buttons to select if
humidified 'HUm' or dry 'drY' calibration gas is
being used.
6. Use the 's' up or 't' down buttons to change
the value to the concentration of span calibration
gas being used.
7. For CO2 calibrations, apply the span gas for three
minutes.
8. Press '3' to confirm when ready and the icon
goes steady.
9. For non-CO2 calibrations, apply the span gas.
10. The dots on the left of the display indicate
progress to a successful span.
11. The display will show the span gas reading and if
measured to be stable for an appropriate period
of time will display 'PASS'.
12. If the span calibration is unsuccessful then the
display will show an error code (see below).
13. Press '3' to accept calibration result (Updt will
be displayed)
7-15
Gas Detector
®