Signametrics
120
6.5 AC Voltage Test
The following procedure may be used to verify the accuracy of the ACV function:
1. If you have not done so, install the SMX2040 and place the covers back on to the chassis. Ensure that the
computer has been on for at least one-half hour, with the covers on, before conducting this test.
2. Apply the following AC voltages to the
V,
Ω
+ & -
terminals. Check to see that the displayed reading on the
SMX2040 is within the indicated readings range.
Table 9-5. Mid-Frequency AC Voltage Tests
All inputs are a sine wave at
400 Hz
.
Step
Range
Input
Minimum Reading
Maximum reading
1
330 mV
10 mV
9.865 mV
10.135 mV
2
330 mV
190 mV
189.595 mV
190.405 mV
4
3.3 V
100 mV
0.098735 V
0.101265 V
5
3.3 V
1.9 V
1.897565 V
1.902435 V
6
33 V
1 V
0.98327 V
1.01673 V
7
33 V
19 V
18.97313 V
19.02687 V
8
250 V
10 V
9.864 V
10.136 V
9
250 V
190 V
189.756 V
190.244 V
Table 9-6. High-Frequency AC Voltage Tests
All inputs are at
50 kHz
.
Step
Range Input
Minimum Reading
Maximum Reading
1
330 mV
10 mV
9.707 mV
10.293 mV
2
330 mV
190 mV
188.573 mV
191.427 mV
4
3.3 V
100 mV
0.0978 V
0.1022 V
5
3.3 V
1.9 V
1.8852 V
1.9148 V
6
33 V
1 V
0.9715 V
1.0285 V
7
33 V
19 V
18.9085 V
19.0915 V
8
250 V
10 V
9.755 V
10.245 V
9
250 V
100 V
99.35 V
100.65 V
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