REED C-322 Manual de usuario

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Model C-322

Datalogging

Sound Level Meter

Instruction

Manual

Tripod sold separately (Model BS-6)

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Table of Contents

Safety ............................................................................................ 3

Features......................................................................................... 4

Specications.............................................................................5-6

Instrument Description.............................................................7-10

Operating Instructions............................................................11-14

Getting Started .....................................................................................11

Datalogger Clock & Interval Setup ................................................. 12-13

Calibration Procedures.........................................................................13

Operating Precautions..........................................................................14

Setup of TestLink RS232 Interface Software..........................14-18

Tutorial/Quick Start.................................................................18-20

Frequently Asked Questions ....................................................... 20

For service on this or any other REED product or information on other

REED products, contact REED Instruments at [email protected].

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Safety

Read the following safety information carefully before attempting to oper-

ate or service this instrument.

Use the meter only as specied in this manual; otherwise, the protection

provided by the meter may be impaired.

Environment conditions

• Altitude up to 2000 meters

• Relatively humidity 90% max.

• Operation Ambient 0 to 40°C

Maintenance & Cleaning

• Repairs or servicing not covered in this manual should only be per-

formed by qualied personnel.*

• Periodically wipe the case with a dry cloth. Do not use abrasives or

solvents on this instrument.

Safety symbol

Complies with EMC standards

*When servicing this meter, use only specied replacement parts. For

service (repairs or calibration) on this or any other REED product or

information on other REED products, contact REED Instruments at info@

reedinstruments.com.

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Features

This datalogging sound level meter conforms to the IEC651 type2,

ANSI S1.4 Type2 for sound level meters. It’s internal memory can keep up

to 32,000 records. Every time you press “REC” button to start recording

data and press “REC” button again to stop recording, there will be a data

set in the memory, you can store as many data sets as you want until the

memory is full. The C-322 uses RS232 interface to perform bi-directional

communication with PC.

• 32-80, 50-100, 80-130 dB level ranges

• Auto-ranging from 30 to 130 dB

• Dynamic range of 50 dB

• 0.1 dB resolution

• Frequency Range: 31.5 Hz to 8 kHz

• Accuracy of ±1.5 dB (ref 94 dB @ 1 kHz)

• 32,000 record data logger

• 4-digit backlit display

• Clock and bar graph displays

• Auto power off

• AC and DC output

• Max/Min function

• IEC651 Type II

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Specifications:

Standards: IEC651 Type2, ANSI S1.4 Type2

Frequency Range: 31.5Hz to 8KHz

Measuring Level Range: 30 ~ 130dB

Frequency Weighting: A/C

Microphone: 1/2” electret condenser microphone

Display: LCD

Digital Display: 4 digits

Resolution: 0.1dB

Display Update: 0.5 seconds

Analog Display: 50 segment bargraph

Resolution: 1dB

Display Update: 50 mS

Time Weighting: FAST (125mS), SLOW (1 sec.)

Level Ranges: Lo : 30 – 80 dB

Med: 50 – 100 dB

Hi: 80 – 130 dB

Auto: 30 to 130 dB

Accuracy: ±1.5dB (under reference conditions

@ 94dB, 1KHz)

Dynamic range: 100 dB

Alarm function: “OVER” is when input is more than the

upper limit of range

“UNDER” is when input is less than the

lower limit of range

MAX/MIN Hold: Holds the Maximum & Minimum value readings

AC output: 1 Vrms at FS (full scale)

Output impedance: Approx. 100Ω

FS: means the upper limit of each level range

continued ...

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DC output: 10mV/dB, output impedance approx. 1KΩ

Power Supply: 1 x 9V battery, 006P or IEC 6F22 or NEDA 1604

Battery Life: About 50 hours with alkaline battery

AC Adapter: Voltage 9 Vc.c. (8-10Vc.c. Max)

Supply Current: > 30mAc.c.

Socket : pin Ground

Casing Positive

External Diameter 3.5mm

Internal Diameter 1.35mm

Electromagnetic

Compatibility: RF eld = 3V/m

Total accuracy = specied accuracy + 0.5dB

Operation Temperature: 0 to 40°C ( 32 to 104°F)

Operation Humidity: 10 to 90%RH

Storage Temperature: -10 to 60°C (14 to 140°F)

Storage Humidity: 10 to 75%RH

Dimensions: 275 L ×64 W ×30mm H (10.8 ×2.5 ×1.2”)

Weight: 285g (including battery)

Includes: Battery, instruction manual, carrying case,

calibration screwdriver, windscreen,

RS232 cable, and Windows datalogging

software

Optional Accessory: Tripod (Model BS-6),

Windscreen (Model SB-01),

Sound Calibrator (Model SC-941),

AC Adapter (Model CFD00230V-09V00)

and USB Cable (Model JBUS300-1C000).

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Instrument Description

1- Windscreen

When taking outdoor measurements in windy weather or when measuring

air conditioning equipment, and such, the wind noise in the microphone

can cause measurement errors. Simply use the windscreen to reduce the

wind and therefore reduce it’s effects on your measurement.

continued ...

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2- Display

Symbol Function

LCD 4 digits

MAX Maximum indication

MIN Minimum indication

Over range

Under range

FAST Fast response

SLOW Slow response

dBA A-Weighting

dBC C-Weighting

-Range indication

Low battery

Under range 20dB

AUTO Auto level range selective

REC Recording datalogger

FULL Memory is full

Auto Power OFF is active

continued ...

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3- Power & Backlight Button

The power button turns the sound level meter ON and OFF, it also

turns the backlight ON and OFF.

Press it once to turn the sound level meter on.

Press it again for moment to turn the backlight ON and OFF.

Press and hold the power button for 3 seconds to turn the power OFF.

Note: When the meter is turned on, the LCD will show how much memory

is currently available.

4- MAX/MIN Hold Button

Press the MAX

MIN button to enter the maximum and minimum record-

ing mode. Select the proper level range before using MAX/MIN mode to

ensure that the reading value will not exceed the measurement range.

Press the button once to select MAX value. Press it again to select MIN

value, and press it once again to select current value with “MAX MIN”

annunciator blinking.

Press the MAX

MIN button and hold it down for 2 seconds to exit the

MAX/MIN mode.

Note: If the sound level range or change A-C weight are changed, the

MAX/MIN mode will be cleared.

5- Record Datalogger Button

When the REC button is pressed, the meter will start recording. The

“REC” annunciator is displayed. Press the button again to stop recording.

6- Frequency Weighting Select Button

A:A-Weighting is for general sound level measurements

C:C Weighting is for checking the low-frequency content of noise

Note: If the C-Weighted level is much higher than the A-weighted level,

then there is a large amount of low-frequency noise.

continued ...

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7- Time Weighting Select Button

FAST is for normal measurements.

SLOW is for checking the average level of uctuating noise.

8- Level Range Control Button

Each time the LEVEL button is pressed, the level range will change

between “Lo” level, “Med” level, “Hi” level and “Auto” level.

9- Microphone

1/2” Electret condenser microphone.

10- CAL Potentiometer

Calibration control for level calibration adjustments.

11- RS232 Interface:

The RS232 signal output is a 9600 bps N 8 1 serial interface.

12- Signal Output Terminal

AC: 1 Vrms corresponding to each range step.

Output impedance

100Ω

Output signal by standard 3.5mm coaxial socket signal on pin.

Note: At “Auto” level range, output signal is

Auto select on “Lo” or “Med” or “Hi” level range.

DC: Output : 10mV/dB

Output impedance

1KΩ

Output signal by standard 3.5mm coaxial socket signal on middle.

13- External DC 9V Power Supply Terminal

For connection with AC adapter.

14- Tripod Mounting Screw

A tripod for this sound level meter can be purchased separately

(Model BS-6).

15- Battery Cover

AC Signal

DC Signal

Ground

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