Troubleshooting - Velleman Personal Scope HPS10 User Manual

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The screen remains blank or there is no signal:
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No power supply
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Batteries are discharged
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Contrast adjustment is incorrect
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Press RESET for at least 10 seconds
REMARK: Temporarily remove both batteries and adapter in case RESET is not helping.
RMS readout is incorrect:
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Make sure that at least 1 and preferably even 2 periods are displayed.
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The batteries are discharged.
No signal on the oscilloscope display:
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Time/div setting is in the wrong position. Try 1ms or choose auto-setup mode.
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The unit is in the Hold position
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Trigger function is set in the "once" position
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The programmed trigger level is not reached (choose "run" mode)
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Y position is wrong or need calibration, see page 11
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The input signal is too high, change the volt/div. setting or choose auto-setup.
Incorrect frequency readout:
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An incorrect time/div. setting has been chosen. (start at 250ns/div)
Voltage readout does not correspond with the actual value:
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The measuring probe is in the X10 position
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The batteries are discharged
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The zero reference is not set correctly for DC measurements.
RS232 Cable (Only for HPS40) :
3,5mm STEREO PLUG
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TROUBLESHOOTING

*The pictures may differ depending on the type of PersonalScope
9P SUB-D FEMALE
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