Global Specialties PB-507 - Manual - Manual (Page 16)

16
Figure 8
Changing the parameters
+V, -V
Turn the +V knob to change the +V value. Turn the –V knob to change the –V
value. The underscored digit will be changed and it will be displayed in white type
inside a black box indicating the active field.
Use the arrow keys to move the selection. If the cursor is moved outside of +V
field limits, the –V field will become active and vice versa. Selection of the active
field can be done in two ways:
•
Automatically, by turning the appropriate knob (+V or –V) or
•
Moving the cursor from one field to another.
Note: When +V or –V is modified by the user, the programmed voltages are
displayed for about 3 seconds.
Monitoring the output voltages
•
+V, -V and the 5V voltages are continuously measured. While +V, -V and
5V voltages are between the specified tolerance the corresponding LEDs
will light green.
•
The fixed 5V voltage measurement is displayed continuously on the
screen. If the output accuracy is out of the specified tolerance (± 200mV),
the corresponding LED will light red.
•
The +V and –V voltage measurements are continuously compared to the
programmed values. If the output accuracy is out of the specified
tolerance (± 100mV), the corresponding LED will light red.
6.5 Debounced pushbuttons
Front-panel controls
Figure 9 shows the Debounced pushbuttons controls on the front panel of the
trainer.