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Troubleshooting the Display
If the display does not turn on:
•
Check the connection to the vehicle battery.
•
The vehicle battery may be too low (below 1 volt) to power the analyzer.
Fully charge the battery and retest.
•
The analyzer's AA batteries may need to be replaced. (alkaline recom-
mended).
•
If the analyzer does not power on when you press and hold the MENU but-
ton, replace the AA batteries.
Replacing the Battery
The MDX-640 can test down to 5.5 volts when the unit's internal batteries are
not functioning. The tester displays LOW INTERNAL AA BATTERIES, REPLACE AA
BATTERIES SOON! when the internal AA batteries need to be replaced.
NOTE: Setup information will be retained while you change the internal batteries.
Use the following procedure to remove and replace the internal AA batteries.
1.
Turn the tester face down.
2.
Remove the screw securing the battery compartment cover using a small
Phillips screwdriver.
3.
Lift the door off and remove the discharged battery.
4.
Insert fresh AA batteries making sure the positive and negative terminals
are positioned correctly.
5.
Reposition the cover and tighten the screw.
MDX-640
Battery Conductance
Analyzer
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