Alpha Technologies Celltron Essential CTE-1200 AT; CTE-2200 AT; CTE-3200 AT - Manual (Page 37)

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Chapter 5: Troubleshooting
The sections below describe how to troubleshoot and maintain your Celltron Essential.
If you have problems with the printer or temperature sensor, refer to their manuals or call Midtronics
Customer Service at 1-800-776-1995.
Screen does not light during testing
Possible causes
If the screen does not light when you test a jar, check the connection to the jar. If the connection is
secure, the following conditions could prevent the analyzer from functioning:
• Jar voltage is too low (<1 V) to test.
• Analyzer battery needs replacement.
• Fuse needs replacement.
Replacing the analyzer battery
Replace the analyzer battery if the display does not light when you press and hold the
MENU button.
To replace the battery:
1. Remove the battery compartment door (use a Phillips screwdriver to remove the screw).
2. Replace battery with a new 9-volt battery, aligning the battery terminals.
3. Reattach the battery compartment door, and insert and tighten the screw.
Replacing the fuse
To replace the fuse:
1. Unscrew the fuse holder on the top of the analyzer. Refer to Figure 1 in Chapter 1.
2. Remove the fuse.
3. Insert the spare fuse included with the analyzer, or use a 5 x 20 mm, 1.25 A fuse.