66
HPS50 PersonalScope
TM
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