Data Translation DT300 Series, User Manual

Page: 123 / 164

Calibration
123
Calibrating the Analog Output Subsystem
To calibrate the analog output circuitry, use an external precision meter. The following
sections describe how to configure for calibration using the supported meters and how to
calibrate the analog output circuitry.
Configuring for an External Meter
To calibrate DAC0 using an external voltage meter, do the following:
1. Connect Analog Out 0+ (TB19) to the positive side of the precision voltage meter.
2. Connect Analog Out 0 Return (TB20) to the negative side of the precision voltage meter.
To calibrate DAC1 using an external voltage meter, do the following:
1. Connect Analog Out 1+ (TB23) to the positive side of the precision voltage meter.
2. Connect Analog Out 1 Return (TB22) to the negative side of the precision voltage meter.
Continue with the next section.
Using the Calibration Procedure
To calibrate the analog output circuitry, do the following:
1. From the main menu of the DT300 Series Calibration Utility, click Configure , and then
Board .
2. Select the name of the DT300 Series board to configure from the combo box, and then click
OK .
3. From the main menu of the DT300 Series Calibration Utility, click Calibrate.
4. Click D/A .
5. In the D/A box, select DAC0 .
6. Click the increment or decrement arrows in the Manual Adjustment box until the display
reads 0 V (within 0.0005 V).
7. Select +FS and verify that the display reads +9.375 V (within ±12 mV for the DT322 and
within ±20 mV for the DT302 and DT304 boards.)
8. In the D/A box, select DAC1 .
9. Click the increment or decrement arrows in the Manual Adjustment box until the display
reads 0 V (within 0.0005 V).
10. Select +FS and verify that the display reads +9.375 V (within ±12 mV for the DT322 and
within ±20 mV for the DT302 and DT304 boards.)
11. Click Quit when you are finished calibrating the analog output circuitry.
Once you have finished this procedure, the analog output circuitry is calibrated. To close the
Calibration Utility, click the close box in the upper, right corner of the window.