ALL-TEST PRO ATPOL II, Руководство пользователя

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removed. In the ATPOL II, trigger levels can be set for both relative and absolute current transient
levels.
Current Measurements in ATPOL II
ATPOL II performs all commonly desired measurements of current. The RMS (root mean square)
currents of phases 1, 2, and 3 and of the neutral line are available by simply pressing [Current]
repeatedly. The sequence of the display is I
1
> I
2
> I
3
> I
N
. If energy consumption is being monitored,
the maximum, minimum, and average RMS current is displayed by repeatedly pressing [More...] after
displaying the appropriate present current. In this way, by combining the [Current ] and [More...] keys,
there are 16 RMS current measurements available.
For instance, if the average current of Phase 3 is desired, press: [Current] (to display I
1
), [Current] (to
display I
2
), [Current] (to display I
3
), [More...] (to display maximum I
3
), [More...] (to display minimum I
3
),
and then [More...] (to display average I
3
). Following viewing each of the phases and neutral, a
summary display of all of the currents can be seen.
Note that if ATPOL II is not monitoring consumption, the
maximum, minimum, and average values are the results
from the last monitoring session.
Note that when ATPOL II is operating in 2 current mode, I
2
is not measured or displayed.
When measuring DC current, the RMS value is the same as
the DC value. To set ATPOL II for reading DC currents,
refer to the section on
Setting Measurement Modes .
Remember that you need to have a DC current probe in
order to read DC current.
Information about the largest swell, the lowest dip, the
largest absolute transient, and the largest relative transient
for both voltage and for current can be viewed on ATPOL II.
Just press the [Spikes] key repeatedly until the summary for
the type of measurement appears (such as “Current
Swells”). The summary tells how many events have occurred and what the trigger level is. Pressing
the [More…] key repeatedly will tell the important information about the worst of that type of event: the
magnitude, duration, and timestamp.
The total harmonic distortion (THD) of currents is displayed using the THD function, discussed later in
this chapter.
Current Measurements in PSM
The consumption data log can record maximum, minimum, and average RMS current for each phase
for each logging period. The summary values at the top of the screen are the maximum, minimum, and
average of all the values shown on the screen.
When viewing consumption waveforms, the average RMS of the cycles of the waveform is shown at the
top, with the average crest factor listed below it. The instantaneous value of each point of the