METREL MI 3399, Инструкция с упражнениями

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Power and Voltage Quality Trainer AD 2
– MI 3399
164
detected, if a drop of more than 10% of the nominal voltage occurs on the input
channel,

Interrupt: 5% - this event will be detected, if detected voltage on all phases is
less than 5% of the nominal voltage.
For detailed explanation of these values, use the
“Help” key on your instrument.
In order to get waveform shape and RMS voltages for each recorded interrupt, the
waveform recorder should be set up. Enter the
“WAVEFORM REC.” submenu from
the
“RECORDERS” menu, and then set the following parameters:

Trigger: events
– waveform recording will be executed after an event happens,
this way we’re going to catch our generated event,

Duration: 2s
– after an event is detected, the waveform recorder will run for the
given Duration minus Pretrigger time (in seconds),

Pretrigger: 1s
– one second of signal history will be recorded before the trigger
occurs

Store mode: single
– value of this parameter is not important for this exercise.
A sample of such a screen is presented in the figure below.
Figure 4-33: Waveform record screen
Now go to RECORDERS

GENERAL REC and setup the general recorder with the
following parameters:

Interval: 10 sec
– Averaging interval. Every 10 seconds an average value will
be calculated for RMS voltage, current, power, harmonics, etc., and stored into
memory.

Include events: On (with waveforms)
– this will run both general and waveform
recorders.

Include alarms: Off
– no alarms will be triggered

Start time: manual

Duration: 1 days
– recording will stop after 24 hours