Imonitor (Output) - Prodigit 3260A Series Operation Manual

32 PRODIGIT

3-8 Imonitor (Output)

Imonitor BNC output is designed to monitor the input load current of electronic load. It can be
connected with oscillograph or recorder for observation.
Via the isolated insulation amplifier in the 3260A Series High Power Electronic Load, Imonitor
can output 0～4Vrms/0～10 Vp-p full scale signal to indicate mean root square value (peak
value) load current from 0 to full scale. The isolated insulation voltage between the load input
end of the 3260A electronic load and Imonitor BNC output end is 500V. Also, the reference
potential at the negative end of BNC is the same as the GPIB earth potential of 3260A Series
High Power Electronic Load. As the isolated insulation amplifier inside the 3260A Series High
Power Electronic Load can provide a complete and convenient testing solution, It can not
only solve the problem on voltage and current during testing, But also the problem of earth
phase connection when one oscillograph is used for observation, because in general
oscillograph, the negative end Ch1 of input BNC communicates with Ch2 and has the same
potential as that of the housing of ocillograph.
In observation of the current wave form of the positive and negative output power source of
the power source to be measured, the isolated insulation characteristics are very effective. In
such a way, connection with the oscillograph sharing same input will not create the output
short-circuit on the object to be measured because the reference potential of Imonitor output
in general electronic load can communicate with the negative end of load input, e.g., if there
is no isolated insulation amplifier for the same potential, short-circuit will happen upon
measuring.