Zonge GDP-32 - Page 354

GDP-32
II
INSTRUCTION MANUAL
May 2002 Section 17, Page 8
ACAL
The ADC goes through an internal calibration each time the system is turned on, or before each
measurement. This is normally done automatically during data acquisition. To implement ADC
calibration manually press .
DIAGNOSTIC EXAMPLES
Example using one analog channel
Procedure to determine the temperature inside the case:
1. From the Main Program Menu press
, Utilities.
2. Press , Diagnostics. The cursor is in the Channel field; currently set to
Channel 1.
3. Press
Pg Dn
NEXT FIELD
to move the cursor to the Power field.
4. Press
SELECT DN
End
to turn on Channel 1.
5. Press
Pg Dn
NEXT FIELD
again to move to the CAL relay. Press
SELECT DN
End
to switch it to IN. Channel
1 is now connected to the internal calibration inputs.
6. Press , PREV to move to the calibration section of the Diagnostics screen.
7. With the cursor on the Cal Pow OFF field, press
SELECT DN
End
to turn the calibrate board
ON.
8. Press
Pg Dn
NEXT FIELD
to move to the Mux Pow field, press
SELECT DN
End
to display CAL.
9. Press
Pg Dn
NEXT FIELD
Pg Dn
NEXT FIELD
Pg Dn
NEXT FIELD
to move to the Mux CAL field. Press
SELECT DN
End
SELECT DN
End
to
display Temp. The temperature is now displayed on the ADC output line on the bottom
portion of the right-hand side of the screen. The display will be similar to:
31.650765C 2685
which is read "31.7 degrees Celsius, 2685 counts." The receiver operates at temperatures
between -40° and +60°C.