ADwin-Gold
USB / ENET, manual version 3.8, October 2005
19
Calibration
ADwin
The upper field shows the current measurement values at the inputs IN1 and
IN2, measured each by the 16-bit and the 14-bit ADC.
Select in the lower field left the DAC which you wish to calibrate and at right the
ADC. The measurement value at the selected ADC is highlighted. Below you
will find the calibration settings for
Offset
and
Gain
of the DAC and the ADC.
There you can directly enter values. With
"Calibrate DAC
" or
"Calibrate
ADC
" you start the calibration of the selected converter.
In the dialog box
"Test
Output
" you can enter a voltage value, which is auto-
matically output at the converter/output you have selected earlier.
Every input you make is immediately transferred to the
ADwin-Gold
system. If
you close the program with
"Ex it
", the new settings remain. With
"Undo&Exit
" you undo all inputs and you exit the calibration program (that
means the original settings are transferred to the
ADwin-Gold
system).
"Diagram
" displays in a graph the accuracy of the current calibration setting.
You print a protocol of the settings with
Calibration
".
Calibrate the converters in the order you like (only with reference voltage
source). The calibration of a converter is effected in 3 steps; you can switch
between the windows of the steps by using the forward/backward buttons.
Calibration is also possible without reference voltage source, but it will not be
so precise. Calibrate first the DACs and then the ADCs.
Step 2
The 3 levels for
calibrating a converter
are described below, for the DAC in
the left column and for the ADC in the right column.
1. Connect the external device (DMM / voltage source):
Select the corresponding key "
Calibrate ...
" for calibrating a con-
verter; the first window appears.:
