Owner's manual

HPS50 PersonalScope

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 the battery and adapter in

case RESET is not helping.

RMS readout is incorrect :

• Make sure that at least 1 and preferably even 2

periods are displayed.

• The battery is 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 or need callibration, see page 30

• 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 250ns/div)

Voltage readout does not correspond with the

actual value :

• The measuring probe is in the X10 position

• The battery is discharged.

• The zero refrence is not set correctly for DC

measurements.

TROUBLESHOOTING