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HD 8701 – Sound Level Meter

HD 8701 sound level meter is a portable instrument, easy and quick to use,
suitable for measuring industrial and civil noise levels.
The noise levels can be easily read in dB (A) on the large LCD display which also
shows all the information concerning the mode of operation of the instrument.
One second after switching on and with a resolution of 0.1 dB, the digital
reading gives the continuously updated value of the RMS sound pressure level,
with a type A frequency weighting. The single range from 30 to 130 dB further
simplifies the use of the instrument, as the user does not have to change scale.
Through the keyboard the following operations are possible:
– selecting the time constant S/F
– displaying the maximum value recorded “MAX” and zeroing it “RESET MAX”,
freezing the indication on the display “HOLD”.

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Product Description

HD 8701 sound level meter is a portable instrument, easy and quick to use,
suitable for measuring industrial and civil noise levels.
The noise levels can be easily read in dB (A) on the large LCD display which also
shows all the information concerning the mode of operation of the instrument.
One second after switching on and with a resolution of 0.1 dB, the digital
reading gives the continuously updated value of the RMS sound pressure level,
with a type A frequency weighting. The single range from 30 to 130 dB further
simplifies the use of the instrument, as the user does not have to change scale.
Through the keyboard the following operations are possible:
– selecting the time constant S/F
– displaying the maximum value recorded “MAX” and zeroing it “RESET MAX”,
freezing the indication on the display “HOLD”.
MODES OF OPERATION
When pressing ON/OFF key the instrument switches on; by pressing it again, the
instrument switches off.
S/F key allows to select selecting the time constant: Slow (1 second) – Fast
(125 milliseconds) are displayed with “S” or “F”. HOLD key allows holding
the indication on display. By pressing HOLD again, you go back to the normal
operation (continuous updating of reading). The frozen state is indicated on the
display with “HOLD”.
By hold the MAX key, you display the maximum value considered (for periods not
exceeding one minute) automatically by the instrument, by the switching on or
since pressing the RESET MAX. The display also indicates if the battery is low.
The instrument switches off automatically if it is in the measure, after about 3
minutes from ignition. In MAX and HOLD disables automatic shutdown of the
instrument.
Automatic shutdown of the instrument in measuring can be disabled by moving
the jumper in the battery compartment. In order to ensure the accuracy of the
instrument over time, it is advised by the calibration trimmer multi-turn “CAL”
in the probe, after connecting the microphone to the calibrator HD 9102.
TECHNICAL SPECIFICATIONS
– Measuring range: 30 dB (A)…130 dB (A)
– Frequency response: weighted A
– Time constants: S = slow (1 s) and F = Fast (125 ms)
– Resolution: 0.1 dB – Precision: class 2
– Display: 12 mm LCD with indication of operating mode and low battery
– Power supply: 9 V batteries
– Autonomy: (continuous duty) 15 hours with zinc-carbon battery, 30 hours with
alkaline battery
– Working temperature: -5…+50°C
– Storage temperature: -20…+70°C
– Dimensions instrument: 80 x 160 x 40 mm
– Weight: 350 gr.

Download

Manuals and Brochures here.  

HD8701.pdf

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