DeltaOHM HD2010UC/A, Руководство по эксплуатации, Страница: 42 / 162

HD2010UC/A
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V4.1
can be set to: 1, 2, 5, 10, 20 and 30 seconds, 1, 2, 5, 10, 20, 30 minutes and 1 hour. A report
time can be set only for the single integration mode (see parameter “Integration mode”). This
parameter needs the “Advanced Analyzer” option”.
•
Max Back-Erase : maximum erase interval of data recorded in SLM mode. The available val-
ues are: 5s, 10s, 30s and 60s: the erase interval is settable with 1s, 2s, 5s or 10s steps, respec-
tively. See description on page.16.
•
Exchange Rate : is used together with "DOSE Threshold" and "DOSE Criterion" in DOSE
calculation. It represents the variation of the sound pressure level corresponding to the double
or the half of the exposure maximum time with the same Criterion Level (indicated as “DOSE
Criterion”). Its value can be equal to 3dB, 4dB or 5dB.
•
DOSE Threshold : it is the noise level below which the DOSE is not increased. The value can
be set in the 0dB÷140dB interval, with 1dB steps.
•
DOSE Criterion : it is the noise level providing a DOSE equal to 100% after an 8 hour expo-
sure. The value can be set in the 60dB÷140dB interval, with 1dB steps.
•
Overload Level : if the sound level exceeds of more than 1 dB the upper limit of the measur-
ing range, set according to the selected input gain, the display will highlight the overload in-
dication (
Δ
and
Λ
). The indication can be activated also at lower input levels, programming
this parameter from 20dB, minimum, to 200dB maximum, with 1dB steps. The shown level
defines the overload threshold when the input gain corresponds to 0dB (Input Gain). The
overload threshold automatically scales with the input gain.
•
Integration mode : Two integration modes are available: the former is single (SING) and the
latter is multiple (MULT). For the description of these modes see “DESCRIPTION OF THE
DIFFERENT ACQUISITION MODES” on page 29. The multiple integration mode requires
an Integration interval different from zero be set, and disables Report Time and Event Trig-
ger.
•
Lev. 1, 2, 3 and 4 Percentile : in the statistical analysis of sound events, L
N
percentile levels
are defined as the levels of noise exceeded for N time percentage throughout the whole meas-
urement interval. For example, L
1
represents the sound level exceeded by 1% of the meas-
urement time. These items define 4 percentile levels selectable between 1% and 99% with 1%
steps. The corresponding variables are shown in the SLM view as L1, L2, L3 and L4, com-
bined with the respective percentage.
S
OUND
L
EVEL
M
ETER
The Sound Level Meter menu features all parameters relevant to the SLM display mode. These
items can be changed directly from the respective display as described in "Selecting Parameters "
on page 16.
The first three items of the menu, from Par. 1 to Par. 3, define the three measuring parameters
and the respective frequency weightings relative to the SLM display mode.
Press RIGHT to change the time weighting of measuring parameters, when selected. When the
time weighting flashes, use the UP and DOWN arrows to change it.
The list of available descriptors is shown on appendix A1 on page 121.
S
PECTRUM
A
NALYZER
The Spectrum Analyser menu includes the specific parameters relative to spectra display modes.
These items can be changed directly in their screens.
•
Aux Pond. : the frequency weighting of the wideband channel combined with the spectrum
and displayed with a vertical bar on the right of the spectrum. A, C and Z weightings are
available.