MI 3155
Eurotest
XD
Test and measurements
168
Figure 7.101: Examples of Illumination measurement result
Measurement results / sub-results
E
Illumination
7.30
Discharging time
Figure 7.102: Discharging time measurement menu
Measurement parameters / limits
Limit U
Voltage limit
[34 V, 60 V, 120 V]
Limit (t) Time limit
[1 s, 5 s]
Measuring principle
The measuring principle of the discharging time function is as following:
Step 1:
The DUT is connected to supply voltage via an external socket.
The instrument monitors the voltage (on supply or internal connections) and
internally stores the peak voltage value.
Step 2:
The DUT is disconnected from the supply and the voltage at the test terminals
starts to fall. Once the rms voltage falls for 10 V the instrument starts to measure
time.
Step 3:
After the voltage drops below an internally calculated voltage value the timer is
stopped. The instrument re-calculates the measured time to a value as it would be
if the disconnection occurred at the maximum voltage value.