Global Specialties PB-507 - Manual - Manual (Page 37)

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b. Adjust the number until high duration of the TTL signal is the closest value to
100 microsecond.
c. Press the OK soft key to finish this step. The message “Step 3 done.” is
displayed on the screen.
8.2.4 Step 4
a. PB-507 will display:
Figure 30
b. Adjust the number until low duration of the TTL signal is the closest value to
100 microsecond.
c. Press the OK soft key to finish this step. The message “Pulse calibration
done.” is displayed on the screen.
8.3 DC Power supplies calibration
Equipment used:
•
Digital multimeter (DMM)
The precision of the calibration depends on the precision of the DMM used.
To calibrate the DC Power supplies module, 4 steps must be completed.
The following rules are applied:
•
Use the +V and -V knobs from the DC Power supplies module to change
the displayed value.
•
Use the Right and Left arrow keys from the DC power supplies module to
move the digit selection.
8.3.1 Step 1
a. Select DC Power Supplies from the calibration menu. The message
“Disconnect all loads” is displayed. Disconnect any loads connected to the trainer
and press the “OK” soft key.
b. Set the DMM to measure DC voltage. Connect the DMM probe to +V and GND
terminals of the DC Power supplies module. PB-507 will display: