SCXI-1121 Calibration Procedure
10
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Configuring the Excitation Level
Each excitation channel of the SCXI-1121 has two different current or
voltage levels. You can set a given channel to one of the following levels:
•
In the current mode—0.150 mA or 0.450 mA
•
In the voltage mode—3.333 V or 10 V
After selecting the excitation mode of the desired operation—voltage or
current, refer to Table 7 to set the SCXI-1121 for the level of operation. The
SCXI-1121 ships with the voltage mode set to 3.333 V.
Verification Procedure
The verification procedure determines how well the SCXI-1121 is meeting
its test limits. You can use this information to select the appropriate
calibration interval for your application.
Verifying Analog Input Offsets
Complete the following steps to verify the analog input offsets:
1.
Refer to Table 12 in the
section for all acceptable settings
for the SCXI-1121. NI recommends verifying all ranges and gains, but
you can save time by checking only those ranges used in your
application.
Table 7.
Excitation Level Jumper Settings
Excitation
Channel
Jumpers
3.333 V or
0.150 mA
(Factory Setting)
10 V or 0.450 mA
0
W16 and
W26
1
W24 and
W25
2
W36 and
W37
3
W48 and
W49
W16
1 2
3
1
2
3
W26
W16
1 2
3
1
2
3
W26
W24
1 2
3
W25
1 2
3
W24
1 2
3
W25
1 2
3
W
3
6
1 2
3
W
3
7
1 2
3
W
3
6
1 2
3
W
3
7
1 2
3
W4
8
1 2
3
W49
1 2
3
W4
8
1 2
3
W49
1 2
3
