REED ST-8850 Скачать руководство пользователя страница 6

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3. Level range select button

    Lo/Hi

Lo

: 35~100dB; 

Hi

: 65~130dB

When “OVER” is indicated, the ranges switch to another range for measurement.

4. Time weighting select button

    S/F

   F (fast response): for normal measurements (fast varying noise)
   S (slow response): for checking average level of fluctuating noise

5. Power and Function Switch     

Turn power ON/OFF and select 

.

A/C weighting & calibration function
A: A – Weighting. For general sound level measurements.
C: C – Weighting. For checking the low- frequency content of noise.
If the C-Weighted level is much higher than the A-Weighted level, then 
there is a large amount of low-frequency noise.
CAL 94dB: Calibration using the internal oscillator

6. MAX Hold button

   MAX

The max. Hold position is used to measure the maximum level of sounds. 
The maximum measured level is up dated continuously. Press once again 
the button, will release the hold and allow a further measurement.
(Maximum Hold: Decay < 15 digits/3min)

7. Data Hold button

   HOLD

The hold function freezes the reading in the display. Press the HOLD 

.

button momentarily to activate or to exit the HOLD function

8. Microphone

1/2 inch Electret Condenser microphone

continued ...

Содержание ST-8850

Страница 1: ...reedinstruments www com Model ST 8850 Sound Level Meter Instruction Manual...

Страница 2: ...this or any other REED product or information on other REED products contact REED Instruments at info reedinstruments com Safety Read the following safety information carefully before attempting to o...

Страница 3: ...only specified replacement parts Complies with EMC Features This Sound Level Meter has been designed to meet the measurement requirements of safety engineers health industrial safety offices and soun...

Страница 4: ...range 65dB Alarm function OVER is show when input is out of range Maximum hold Hold readings the Maximum Value with decay 1dB 3minutes AC output 0 65 Vrms at FS full scale Output impedance Approx 600...

Страница 5: ...wind speed over 10m sec please put protective accessories the windscreen provided in front of the microphone 2 Display SYMBOL FUNCTION LCD 4 digits MAX Maximum Value hold OVER Over range F Fast respon...

Страница 6: ...ing the low frequency content of noise If the C Weighted level is much higher than the A Weighted level then there is a large amount of low frequency noise CAL 94dB Calibration using the internal osci...

Страница 7: ...OUTPUTS Two outputs can be accessed through a 3 5mm stereo phone plug refer DC output Logarithmic signal 10mV dB Impedance 100 AC output Approx 0 65Vrms corresponding to each range step Impedance 100...

Страница 8: ...old Mode function disable 2 Insert the microphone housing carefully into the insertion hole of the calibrator 3 Turn on the switch of calibrator 94dB 1kHz and adjust the CAL potentiometer of the unit...

Страница 9: ...back of the meter and install a 9 volt battery in the battery compartment 2 Turn the power on and select the desired response time and weight ing If the sound source consists of short bursts or if it...

Страница 10: ..._____ ________________________________________________ ________________________________________________ ________________________________________________ _______________________________________________...

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