Radio Shack 2200813 - Measuring AC Voltage on DC Bias

11
Operation
Measuring AC Voltage Riding on a DC Source Bias
Warning: Toavoidinjuryordamagetoyourmeter,nevertrytomeasureanACvoltage
onaDCsourcebiaswherethepeakACvoltageexceeds100Vwithrespecttoearthground.
1. Set the function dial to V (DC voltage). Measure the DC voltage first to ensure that it
doesnotexceed100V.
2. Disconnect power from the circuit.
3. Press SELECT(ACmode). appears.
4. Connect the black test lead to the circuit’s neutral/ground lead.
5. Connecta0.1microfarad/100Vmylarcapacitorinserieswiththevoltagesource’s
positive terminal and the red test lead.
6. Restore circuit power and read the voltage.
7 Poweroffthecircuit;thendisconnectthecapacitor.