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National Instruments Corporation
9
SCXI-1120/D Calibration Procedure
Verifying the Operation of the Module
The verification procedure determines how well the SCXI-1120/D module
is meeting its specifications. You can use this information to select the
appropriate calibration interval for your application. Refer to the
section for information on how to configure the channel filter
and channel gain.
Complete the following steps to verify the operation of the SCXI-1120/D
module:
section in this document.
2.
Refer to Table 7 for the SCXI-1120 module or Table 8 for the
SCXI-1120D module for all acceptable settings for the module.
Although NI recommends verifying all ranges and gains, you can
save time by checking only those ranges used in your application.
3.
Set the channel filter for all channels on the module to 4 Hz for
the SCXI-1120 module or 4.5 kHz for the SCXI-1120D module.
4.
Set the channel gain on all channels to the gain you want to test,
starting with the smallest gain available for the module. Available
gains are shown in Tables 7 and 8.
5.
Connect the calibrator to the analog input channel you are testing,
starting with channel 0.
If you do not have an SCXI terminal block such as the SCXI-1320,
refer to Table 5 to determine the pins on the 96-pin front connector that
correspond to the positive and negative inputs of the specified channel.
Table 4.
SCXI-1120D Filter Jumper Allocation
Input
Channel
Number
First Filter Jumper
Second Filter Jumper
4.5 kHz
(Factory
Setting)
22.5 kHz
4.5 kHz
(Factory
Setting)
22.5 kHz
0
W17-A
W17-B
W26
W25
1
W18-A
W18-B
W28
W27
2
W19-A
W19-B
W30
W29
3
W20-A
W20-B
W32
W31
4
W21-A
W21-B
W34
W33
5
W22-A
W22-B
W36
W35
6
W23-A
W23-B
W38
W37
7
W24-A
W24-B
W40
W39
