Hoefer IEF100 - Manual (Page 49)

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Troubleshooting
Problem Solution
Instrument does not turn on Check power cord is plugged into grounded outlet and ON/OFF switch is
turned to the on (l) position.
Lid is open Unit will not operate unless the safety lid is fully closed. Press down on both
sides to engage latches.
Unit reads 0 μA, 0 W for all strips Ensure the electrode wicks are in contact with the IPG strips.
The electrodes should be contacting the electrode wicks, and centered in the
area of overlap between the wick and the IPG strips.
Check that the IPG strips have been fully hydrated prior to use.
Ensure the electrodes are connected to the corresponding receptacles.
Low starting voltage of gradient steps may not produce enough current to
register at the beginning of the step. Check the current in the strips again in
a few minutes.
Run diagnostics to check the internal power supply.
Unit reads 0 μA, 0 W for only one strip Poor IPG strip rehydration: inspect the thickness (height) of the IPG strip
over its entire length.
Check for arcing or burning that could break the electrical circuit.
Broken wire in the (–) electrode. Replace electrode.
No voltage output Run diagnostics from the options menu.
Contact your local Hoefer, Inc. representative.
Blank display Turn unit off and on.
Contact your local Hoefer, Inc. representative.
Screen frozen Turn unit off and on.
Contact your local Hoefer, Inc. representative.
Fails diagnostics The diagnostics program will check the volt and current output of the
internal power supply, the eprom and the system clock. Contact your local
Hoefer, Inc. representative if any of these tests come up negative.