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L2275
Emax UL
74/132
Doc. N°
Mod.
RH0109002
Apparatus
Scale
Page N°
By entering the page, 120 samples of the wave form of phase L1 are acquired and then displayed. By
pressing the
↵
key, a new acquirement and re-display of the waveform is carried out. By means of the
→
or
←
keys, it is possible to display the waveforms on the other measurement channels (L2, L3, Ne, V1,
V2, V3, Gt).
Using either the
↑
or
↓
keys, it is possible to carry out a harmonic analysis of the samples acquired and
displayed on the “Wave Form” page.
This means the page indicated here at the side is displayed, containing the module of the harmonics from
the 2
nd
to the 20
th
(up to the 19
th
for network frequency set to 60Hz) referred as a percentage of the
fundamental (harmonic n°1) and therefore always indicated at100%.
Using the
→
and
←
keys, it is possible to position yourself over the desired bar (at the “N° “ of harmonic
desired, the bar starts to flash) and read the corresponding percentage value.
Measurement precision
5%
15.2.8.4.5 Historic Measurements
The PR113 unit is able to provide the trend of the measurements of some values over a settable period of time “P” (see “Store Meas. T”, par. 6.2.1
for setting the periods).
Memory (not volatile) is kept of the last 24 “P” periods which are displayed in a histogram (see figure) with the least recent period positioned on
the right side of the page whereas on the left side there is another bar (the 25
th
) representing the progressive value of the period in progress of
storage.
Using the
→
and
←
keys, it is possible to position yourself over the bar desired (which starts to flash) and read the corresponding value of the
that period (for example, the maximum power determined in the “P” interval) as well as the time that period of measurement was started with reference
to the present instant.
The measurements can only be acquired with Vaux present for the whole period of storage, otherwise the data is not recorded. The “turning on
auxiliary” symbol indicates that there has been a period (without Vaux) of no storage during which the data were lost and the time counter was
blocked.
The full-scale of the histograms is fixed by the graduated scale present on the diagram (on the left side). In any case, the higher values are correctly
displayed in the “Value of the present bar” field.
Apart from “Average active power” and “Maximum Active power”, the “Maximum Current”, “Maximum Voltage” and “Minimum Voltage” historical
values are available.
15.2.8.4.4 Display of Wave form and harmonic calculation
Progressive value of present period
Indication of variation of the “P” period
Value of the bar currently selected.
Period of storage of the bar selected.
Hour and minute of starting the period the bar
refers to, in relation to the present instant
Indication of Vaux
being turned on
The “empty” bars
indicate a
negative value.
Channel displayed
Value of harmonic N°
N° of harmonic currently selected
RMS of the signal displayed
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