METREL MI 3399, Instruction Manual With Exercises

Page: 185 / 272

Power and Voltage Quality Trainer AD 2
– MI 3399
185
status in the MEASRUEMENT SETUP

CONNECTION SETUP menu. If it's marked
with an OK sign ( ), you can start observing measurements.
4.8.1 Real time measurements
By entering the MEASRUREMENTS MENU user can observe measured parameters
in real time.
Please note that voltage dips and swells have great influence on the flickermeter filters,
which can lead to faulty measurements. In order to get reliable values, it is therefore
recommended to check if events are present, and then reset the previous flickermeter
’s
history by pressing the F2 function key (Reset). This will guarantee that the obtained
flicker measurement P
st
will represent the first reliable value after approximately 20
minutes of measuring.
Figure 4-71: Real time measurements of flicker
4.8.2 Recording flicker measurements
The basic tool for Power Quality analysis is recording electrical system parameters. In
this step we will create a record and observe it on the instrument, as this is a typical
case for troubleshooting.
From the Main menu, enter the Recorders window and then go to the General rec.
menu. Here the user needs to set up all the parameters as shown in the figure below:
Figure 4-72: General record settings
After all these changes have been made, we are ready to run the recorder by pressing
F1 key. Even though we've set it up to finish after 1 day, recorder can be stopped
anytime by pressing F1 (STOP) key.