Manual

71M6541 Demo Board REV 3.0 User’s Manual
52 Rev 4.0
Figure 2-12: Meter with Calibration System
Figure 2-13 shows the screen on the controlling PC for a typical Demo Board. The error numbers are given in
percent. This means that for the measured Demo Board, the sum of all errors resulting from tolerances of PCB
components, current sensors, and 71M6541F tolerances was –3.41%, a range that can easily be compensated
by calibration.
Figure 2-14 shows a load-line obtained with a 71M6541 in differential mode. As can be seen, dynamic ranges of
2,000:1 for current can be achieved with good circuit design, layout, cabling, and, of course, good current sen-
sors.
Figure 2-13: Calibration System Screen
Calibrator
AC Voltage
Current CT
Meter
under
Test
Optical Pickup
for Pulses
Calibrated
Outputs
Pulse
Counter
PC