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0692-2348-01 (06/03/1997) REV A.
6. If setting up an MGA-1400-3-0, press <↑>↑> until "SE 2" is displayed. Press <FUNCTION> to
enter the Altitude entry mode.
7. Use <↑>↑> and <↓>↓> to select the correct altitude setting in METERS. 100 METERS = 328 FEET,
100 FEET = 30.5 METERS.
8. Press <FUNCTION> when the desired setting has been reached. This value is now stored in
Memory. The display reverts back to "SE 2" or "SE 3.
SOFTWARE GAS CALIBRATION:_________________________________________
9. Press <↑>↑> until "CODE 3" is reached.
10. Press <FUNCTION>; the display will indicate "----". Enter the password that can be found on
page iv of the MGA-1400 Service Manual. The CO2 display should indicate "GC 0". (Gas
Calibration mode).
11. Press <↑>↑> to display "GC1" and press <FUNCTION>.
12. Press <↑>↑> or <↓>↓> until the Current CO Gas Tag Value is displayed. NOTE: Pressing <MODE>
will alter which position is being changed; i.e. pressing it once will move to the 0.10 digit, repeat
to alter the 1 position.
13. Press <FUNCTION> to advance to the CO2 reading and again enter Gas tag Value as in step
12.
14. Press <FUNCTION> to advance to the HC reading and again enter Gas Tag Value as in step 12.
15. Press <FUNCTION> to return to the "CG 1" prompt, then press <↑>↑> to display "CG 2", and press
<FUNCTION>.
16. An AUTO CAL will be performed, and "ON" or "OFF" will be displayed in all windows. If "OFF" is
selected, the gas reading will be uncorrected. This should only be used for service diagnostics to
determine what the bench is actually doing, as opposed to the results of software compensation.
If this is the final calibration before leaving the machine, ensure all three displays read "ON."
Use <↓>↓> and <FUNCTION> to set them all ON.
17. Press <FUNCTION> to Display "GAS", and flow gas at 14 SCFH into the O2 exhaust port for 1
Minute. Turn the Gas off and press <FUNCTION> to start Calibration. "CAL" will be displayed.
18. When the calibration is complete, the "ON" and "OFF" readings will be displayed from step 9.
LEAK CHECK: ________________________________________________________
19. "CG 2" will be displayed; press <↑>↑> to display "CG 3" and <FUNCTION> to select it and "LC"
should be displayed.
20. Plug the end of the Sample Probe with the leak check cap (0787-0035). In 20 Seconds, the
Pump will shut off.
21. The pump should be off for 20 seconds and either "LEC" will be displayed or the tester will
advance to "CG 3". If "LEC" is displayed, check for a leak.
SOFTWARE CALIBRATION COMPLETE
INSERT THESE INSTALLATION INSTRUCTIONS IN THE BACK
OF THE APPROPRIATE SUN SERVICE MANUAL