Table 3-1 3260A Series High Power Electronic Load Imonitor Specification - Prodigit 3260A Series Operation Manual

High power load

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Table of Contents

PRODIGIT

3.1.18 Imonitor Current Monitoring output BNC Connector

Imonitor output signal is designed mainly to facilitate connection with the oscillograph

so that the waveform of the load current can be observed. Regardless of Preset ON

or OFF, the analog signal output from Imonitor is in direct proportion with the load

current flowing through the load current. Please refer to the relationship between the

analog voltage output signal and load current of 3260A Series High Power Electronic

Load listed in Table 3-1. The full scale of Imonitor is 10V.

The Imonitor BNC output signal in 3260A Series High Power Electronic Load is

through an isolated amplifier, e.g., the earth potential of the output analog signal and

the earth potential of the DC load input are separated with each other. In this way,

when connection is made with the oscillograph of which another input is connected

with both ends of the load, the metering error shall not be resulted from the negative

end of the Imonitor BNC output flowing to the negative end via the oscillograph due

to different potential. On the other hand, When the positive and negative power

source is measured and the two load current wave forms are observed at the same

time, two sets of Imonitor can be connected with Ch1 and Ch2 of the oscillograph.

As the general input of the oscillograph has no isolated insulation device, therefore, if

the Imonitor output has no isolated insulation device after connection is made, short-

circuit will happen to the power source to be measured thus disabling the measuring.

This is because the Imonitor output of the general electronic load shares the same

reference point with the earth of the load input. However, as a light insulation isolated

amplifier is contained in the 3260A Series High Power Electronic Load, the condition

cited above can be avoided, e.g., the load current wave form of two sets of positive

and negative power sources to be measured can be observed simultaneously without

causing any affection or inconvenience.

Imonitor