GHM DeltaOHM HD2010UC Operating Manual Download

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HD2010UC

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V4.2

The calibration can be made either using the provided acoustic calibrator (type 1 according to IEC
60942) or the built-in reference generator. The electric calibration employs a special preamplifier
and checks the sensitivity of the measuring channel, microphone included. A protected area in the
non-volatile memory, reserved to factory calibration, is used as a reference in the user’s calibra-
tions, allowing keeping instrument drifts under control and preventing the instrument from wrong
calibrations. The check of the complete sound level meter functionality can be made directly by the
user, on site, thanks to a diagnostic program.

The HD2010UC sound level meter can  perform the measurements required to evaluate workers’
noise exposure (ISO 9612/11 and D.Lgs.81/08). The selection of the personal protective equipment
can be carried out, according to UNI EN 458, through comparison of the A and C weighted equiva-
lent levels that can be measured simultaneously (SNR method).    The noise source impulsivity is
easily  evaluated  (according to UNI9432) measuring the equivalent sound pressure level A
weighted with Impulse time constant (LAeqI).
The class 1 HD2010UC sound level meter with the “Advanced Data Logger” option is suitable for
sound level monitoring and acoustic mapping. Using the “Advanced Data Logger” option, it can al-
so perform assessments of the acoustic climate with capture and analysis of sound events. When
measuring traffic noise near airports, railways and roads, the sound level meter can be used as a
multi-parameter sound recorder, combining statistical analysis  features. Remote electrical calibra-
tions and diagnostic tests can be executed using its remote control capabilities.

The HD2010UC can be configured in accordance with different customers’ needs: the available op-
tions can be activated on the new instrument, as well as, later on, when requested by the user. The
provided options are:



“Advanced Data Logger” option

Display and recording of the A-weighted sound level profile with FAST time constant, sampled

8 times per second.

Storage of the profiles of 3 programmable parameters, sampled twice per second. Simultaneous-

ly, the profiles of 3 programmable parameters are recorded at 2 samples/second. The HD2010
sound level meter changes into a sound level logger capable of storing 4 parameters for more than
23 hours. Impulsive events can be easily identified thanks to the possibility of analysing the profile
of the A-weighted sound level with FAST, SLOW, and IMPULSE constants.

A second recording mode allows storing 3 parameters programmed together with the average

spectra, at intervals programmable from 1 second up to 99 hours. In this recording mode, you can
store 3 parameters according to intervals of 1 minute for over 80 days using the supplied memory (4
MB expandable to 8 MB). The sound level meter automatically resets all integrated levels at the be-
ginning of each acquisition interval.

Recordings can later be searched in the memory and viewed on the graphic display using the

“replay” function, which reproduces the time trend of the sound trace.

The HD2010UC sound level meter with the “Advanced Data Logger” option has more sound

level analyzer functions.

•

Statistical analysis is available graphically in the form of the

sound level distribution of prob-

abilities

and the

percentile levels graph

•

Parallel to the normal sound level profiles recording mode, you can select a

report recording

programmable according to intervals from 1s to 1 hour, with 5 integrated parameters and the
sound level distribution of probabilities.

•

It is possible to enable a

trigger feature

to capture sound events, and false events can be fil-

tered by requiring that the sound level variation be of a certain length. You can record 5 inte-
grated parameters per each event, and the sound level distribution of probabilities being sam-
pled during the event. The event parameters recording does not exclude logging of profiles
and reports. The event trigger feature can also be activated by pressing a key. Thanks to “Ad-
vanced Data Logger” option, the HD2010UC can acquire the noise profile of 3 acoustic de-