Troubleshooting; The Screen Remains Blank Or There Is No Signal; Rms Readout Is Incorrect; No Signal On The Oscilloscope Display - Velleman PersonalScope HPS5 Manual

TROUBLESHOOTING

The screen remains blank or there is no signal :

• No power supply
• Batteries are discharged
• Contrast adjustment is incorrect
• Press RESET for at least 10 seconds
REMARK: Temporarily remove both batteries and adapter in case
RESET is not yet operational.

RMS readout is incorrect :

• Make sure that at least 1 and preferably even 2 periods are displayed.
• The batteries are discharged.

No signal on the oscilloscope display :

• Time/div setting is in the wrong position. Try 1ms or choose auto-
setup mode.
• The unit is in the Hold position
• Trigger function is set in the "once" position
• The programmed trigger level is not reached (choose "run" mode)
• Y position is wrong
• The input signal is too high, change the volt/div. setting or choose
auto-setup.

Incorrect frequency readout:

• An incorrect time/div. setting has been chosen. (start at 2µs)
Voltage readout does not correspond with the actual value :
• The measuring probe is in the X10 position
• The batteries are discharged
• The zero refrence is not set correctly for DC measurements.
• Take into account that the RMS readout only measures the AC
voltage