NI 449
x
Calibration Procedure | © National Instruments | 7
If verifying an NI 4496/4498, compare this value to the appropriate limits in Table 3. The
average is the offset for channel AI 0 at the 0 dB gain setting.
If verifying an NI 4495, compare this value to the limits in Table 4. The average is the offset
for channel AI 0 at the 0 dB gain setting.
If verifying an NI 4492/4497/4499, compare this value to the appropriate limits in Table 5.
The average is the offset for channel AI 0 at the 0 dB gain setting, at the 204.8 kS/s sample
rate, in the selected coupling mode.
8.
Repeat steps 2 through 7 for each gain setting that your device supports. Refer to Table 6
for the gain settings supported by NI 449x devices. When performing step 2, adjust the gain
parameter appropriately.
Table 3.
AI Offset Limits for NI 4496/4498
As Found Test Limit
As Left Test Limit
Min (mV)
Max (mV)
Min (mV)
Max (mV)
–2
2
–0.5
0.5
Table 4.
AI Offset Limits for NI 4495
As Found Test Limit
As Left Test Limit
Min (mV)
Max (mV)
Min (mV)
Max (mV)
–0.5
0.5
–0.25
0.25
Table 5.
AI Offset Limits for NI 4492/4497/4499
Coupling
As Found Test Limit
As Left Test Limit
Min (mV)
Max (mV)
Min (mV)
Max (mV)
AC
–10
10
–0.5
0.5
DC
–0.5
0.5
–0.25
0.25
Table 6.
Supported Gain Settings
Device
Gain Settings
NI 4492
0 dB, 20 dB
NI 4495
NI 4496
NI 4497
NI 4498
0 dB, 10 dB, 20 dB, 30 dB
NI 4499