Specifications

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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