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Subject to change without notice
HM1508-2 Troubleshooting
Security advice!
The following procedures assume that the instrument is
connected to mains/line via a safety class II transformer.
Only qualifi ed personnel (technicians and engineers) who
are aware of the danger of electricity should execute the
following procedures.
If cables or connectors have to be disconnected, the instrument
must be switched off before removing them.
For measurement at high voltage (-1.5 kV Focus and -2 kV) use
suitable probes, recommended by HAMEG.
Such measurements should be performed in the following
way:
1. Switch the oscilloscope off.
2. Connect measuring instrument reference potential to
chassis.
3. Connect the probe tip of the measuring instrument to the
measuring point.
4. Switch the oscilloscope on.
5. Before removing the measuring instrument connections,
switch the oscilloscope off again.
A: Opening the Oscilloscope
1. Place the oscilloscope upside down, set the handle in the
maximum position to the rear, then pull on both handle
knobs and remove the handle. (Photo A1 and A2)
Photo A1
Photo A2
2. Unscrew the nuts and remove the back panel. (Photo A3,
A4 and A5)
Photo A3
Photo A4
Photo A5
HM1508-2 Troubleshooting
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