THM420 Performance Verification
12
Handheld and Benchtop Instruments Basic Service
Table 14: AC Amperes Accuracy
AC Current Source Readout Limits
M
20 Rot
ry
Switch
Current
Frequency Minimum Maximum
mA 200.0 mA 50 Hz 195.9 mA 204.1 mA
5. Set the METER/SCOPE button to SCOPE mode.
6. Verify that the current measurement is displayed.
7. Disconnect the test setup.
NOTE. For the following series of tests, the METER/SCOPE button must remain
in the SCOPE mode.
The following check verifies trace shift accuracy.
1. Turn the THM420 rotary switch to V
.
2. Connect the THM420 COM input to the V W Hz
input with a shorting
strap.
3. Verify that there is no trace shift while using the
buttons to switch
between SCALE settings (vertical volts/division).
4. Disconnect the test setup.
The following check verifies trace slope accuracy.
1. Turn the THM420 rotary switch to V
.
2. Set the DC/AC button to AC(V).
3. Set the SCALE to 200 V with the buttons.
4. Set the horizontal time-per-division to 100 ms with the
buttons.
5. Connect the voltage source to the THM420 COM and the V W Hz
input
connectors.
6. Set up the voltage source to output an AC voltage of 200 V at 1 kHz.
7. Set the THM420 trigger slope to
and verify that the waveform display
starts on the rising edge.
Trace Shift
Trace Slope
To Next Page
Loading...
Need help?
General
