RS Pro RS-8852 Manual De Instrucciones página 5

Sound level meter with datalogger / English
Frequency weighting select button
A: A-Weighting
C: C-Weighting
HOLD button:
Press "HOLD" button, The hold function freezes the reading in the display.
Power button
Turn the meter power ON/OFF
External DC 9V power supply terminal
For connection with DC 9V power supply.
Aperture size: external diameter: 3.5mm, internal diameter: 1.35mm
USB interface
USB signal output is a 9600 bps serial interface.
AC/DC signal output earphone outlet
AC: Output voltage: 1Vrms corresponding to each range step.
Output impedance: 100Ω
DC: Output voltage: 10mV/dB
Output impedance: 1kΩ
Calibration potentiometer (CALL)
For external standard level calibration adjustments.
Microphone
1/2 inch Electret Condenser microphone
6
5. CALIBRATION PROCEDURES
1. Make the following switch settings:
Frequency weighting: A-weighting
Time weighting: FAST
Level range: 50 ~100dB
2. Insert the microphone housing carefully into the 1/2 inch insertion hole of
the calibrator (94dB @ 1kHZ).
3. Turn on the switch of calibrator and adjust the CALL potentiometer of the
unit 94.0dB is displayed.
NOTE: All products are well calibrated before shipment. Recommended
recalibration cycle: 1 year.
6. MEASUREMENT PREPARATION
1. Remove the battery cover on the back and put in one 9V battery.
2. Recover the back cover.
3. When battery voltage drops below the operating voltage or battery aging, this symbol
on LCD. Replace the 9V battery.
4. When the AC adapter is used, insert the plug of the adapter (φ3.5) into the DC 9V connector on the side
panel.
7. OPERATING PROCEDURE
1. Power on the meter.
2. Press 'LEVEL' button to select desired level, base on 'UNDER' or 'OVER' do not appear on LCD.
3. Select 'dBA' for general noise sound level and 'dBC' or measuring sound level of acoustic material.
4. Select 'FAST' for instant sound and 'SLOW' for average sound level.
5. Select 'MAX/MIN' button for measuring maximum and minimum noise level.
6. Hold the instrument comfortable in hand or fix on tripod and measure sound level at a distance of
1~1.5 meter.
8. NOTICE
1. Do not store or operate the instrument at high temperature and high humidity environment.
2. When not in use for long time, please take out the battery to avoid battery liquid leakage and cautery on
the instrument.
3. When using the instrument in the presence of wind, it is a must to mount the windscreen to not pick up
undesirable signals.
4. Keep microphone dry and avoid severe vibration.
9. Accessories:
1. installation CD
2. USB interface cable
3. screwdriver
Sound level meter with datalogger / English
Acoustic Calibrato
REC
FAST
A/C
will appear
7