Table of Contents
Advertisement
1. Disconnect the probe from all circuits and turn the meter OFF.
2. Connect the insulated BNC connector to the voltage jacks (red to
and black to
3. Connect your BNC cable to the insulated BNC jack and to your oscil-
loscope.
4. Turn the rotary switch to the current measurement function A~. Selec-
tion is confirmed with a short beep.
5. Press the trigger to open the jaws. Clamp the jaws around the con-
ductor. The most accurate readings are obtained with the conductor
aligned with the centering marks on the jaws.
6. Adjust the oscilloscope range for the desired waveform size and dis-
play. Readings from the Model 721 are also valid. The analog output
is preset to 1 mV/A at the factory and permits current measurements
from 50 mA to 700.0 Arms, and to 999.9 A Peak.
5.8.1 Output Level
The output is preset at 1 mV/A at the factory. We recommend that you use
the oscilloscope amplification rather than changing the 1 mV/A output in
order to benefit from the full 700 Arms operating range. The 10 mV/A is
limited to 60 Arms.
Analog output may be switched internally to either 1 mV per A or 10 mV
per A. The selection is made internally by a mini switch located under the
input terminal circuit card found on the base of the instrument (refer to the
diagram on p. 42).
Extreme care should be exercised when changing the mini switch selec-
tion to avoid damaging internal components or wires. This procedure
should only be performed by qualified service personnel.
5.9
Summary of Accessible Functions
Smooth
Arms
Yes
Vrms
Yes
%THD
Yes
%DF
Yes
CF
Yes
Hz
Yes
Harmonic Meter Model 721
).
Peak
MAX
Yes
Yes
Yes
Yes
No
Yes
No
Yes
No
Yes
No
Yes
MIN
AVG
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
MAX Peak
Yes
Yes
No
No
No
No
39
Advertisement
Table of Contents
