String Current Calibration
590-2106-501A/SL-29421/4200-099
7
Gain Level
Input voltage 1
Input voltage 2
Gain 10B
100.100 mV
100 uV
Gain 100B
10.020 mV
20 uV
Gain 1000
1.020 mV
20 uV
Table 1 - Calibration Input Voltages
5.
Record the actual input value indicated by the DVM in the IC 1 input 1 box of the Gain
Calibration tab.
6.
Click
Get Input 1 Counts
and the Raw Counts value will update.
7.
Click
Get Input 1 Counts
a second time after the raw counts have been updated and wait for a
second raw counts update before moving on to the next step.
8.
Adjust the Calibration source to the nominal Input Voltage 2 value for the selected gain level
(100uV for Gain 10) shown in table 1.
9.
Record the actual input value indicated by the DVM in the IC 1 input 2 box of the Gain
Calibration tab.
10.
Click
Get Input 2 Counts
and the Raw Counts value will update.
11.
Click
Get Input 2 Counts
a second time after the raw counts have been updated and wait for a
second raw counts update before moving on to the next step.
12.
Click
Update
to send the calibration constants to the UXIM/UXTM. Typical raw count values
are shown in table 2.
Gain
Input voltage 1
Typical Counts
Input voltage 2
Typical Counts
Gain 10B
100.100 mV
2541760
100 uV
2578
Gain 100B
10.020 mV
2538220
20 uV
5096
Gain 1000
1.020 mV
2584864
20 uV
51722
Table 2 - Calibration Voltages and Typical Raw Count Values
13.
Repeat steps 3 through 12 for the remaining gain levels in table 1. Choose each gain level from
the Gain drop-down box and adjust the Calibration source to the corresponding nominal input
voltage value shown in table 1.