Operation; Turning On/Off The Personal Scope; Resetting The Personal Scope; Adjusting The Contrast - Velleman PersonalScope HPS5 Manual

OPERATION

Turning on/off the Personal Scope

Press the "ON/OFF" switch briefly to (de)activate the unit. The screen
will briefly display the logo above the message "timer on", which means
that the unit will deactivate after eight minutes if no other key has been
pressed during this interval. In order to bypass automatic deactivation :
Keep the ON/OFF switch pressed down while activating the unit. The
screen will briefly display the message "timer off".
F
When the unit is deactivated, the last setup will be saved as long as
the power is not cut and as long as the unit is not "reset" (see
below).

Resetting the Personal Scope.

In case of unusual behaviour of the keypad or the display, it is possible
to reactivate the unit by using the "Reset" function. The unit will
subsequently return to the manufacturer-programmed setup.
Press the sunk "Reset" push button for at least 10 seconds.
F
Do not use a sharp tool !

Adjusting the contrast

Press the "contrast" key until the desired contrast is displayed.
The user can either keep the key pressed down or press it repeatedly.
When pressing this key, the contrast will always increase to maximum
level before starting again at the lowest available level and working its
way up again
AC/DC

Choice of input

Depending on (part of) the signal to be measured, the input can be
connected to the signal through a direct link or by using a decoupling
capacitor. Select DC for measuring DC voltage. Press the "AC/DC" key
to select either AC or DC input coupling (see indications on the screen).
F
When measuring the "ripple" of a DC voltage : put the input on AC
to limit the measurement to the AC component of the signal.