Circuit

Custom one-chip of microprocessor LSI circuit.

Display

LCD size : 50 mm x 30 mm

LCD with green backlight ( ON/OFF ).

Measurement Type

SPL : Sound pressure level Dose:test noise exposure

Measurement Range

SPL:Auto 30 - 130 dB.

Dose:70~130dB

Resolution

0.1 dB.

Function

dB ( A & C frequency weighting ), Time weighting ( Fast, Slow ), Data hold

Record ( Max., Min. ).

Accuracy (23 ± 5 ?)

Characteristics of " A " frequency weighting network meet IEC 61672 class 2.

Under 94 dB input signal, the accuracy are :

Remark :

The above spec. are tested under the environment RF Field Strength less than 3 V/M & frequency less than 30 MHz only.

Frequency Weighting Network

Characteristics of A & C.

A weighting :

The characteristic is simulated as "Human Ear Listing" response. Typical, if making the environmental sound level measurement, always select to A weighting.

C weighting

The characteristic is near the "FLAT" response. Typical, it is suitable for checking the noise of machinery (Q.C. check) & knowing the sound pressure level of the tested equipment.

Time weighting

(FAST & SLOW)

Fast - t = 125 ms

"Fast" range is simulated the human ear response time weighting.

Slow - t = 1 s

"Slow" range is easy to get the average values of vibration sound level.

Data hold

To freeze the measurement value.

Function selector SPL  DOSE

Auto  range:30~130dB.

Threshold Level (Thr):70~90dB in 1dB steps. Criterion  Level(Crit):80?84?85?90dB. Exchange Rat :3, 4, 5 or 6 dB

Frequency

31.5 to 8,000 Hz.

Microphone type

Electric condenser microphone.

Microphone size

Out size, 12.7 mm DIA. ( 1/2 inch).

Calibration VR

Build in external calibration VR, easy to calibrate on 94 dB level by screw driver.

* Calibrated via external SOUND CALIBRATOR ( SC-942, optional ).

Calibrator

B & K (Bruel & kjaer), MULTIFUNCTION ACOUSTIC CALIBRATOR Type 4226.

Datalogger Sampling Time Setting range

Auto

1 second to 3600 seconds

@ Sampling time can set to 1 second, but memory data may loss.

Manual

Push the data logger button once will save data one time.

@ Set the sampling time to 0 second.

Memory device

internal memory device :

EEPROM can be record 16,000 items.

external memory device ( AC Adapter only ) : SD memory card. 1 GB to 16 GB.

Data error no.

≤ 0.1% no. of total saved data typically.

Advanced setting

Set clock time ( Year / Month / Date,Hour

/ Minute / Second )

Set sampling time

Auto power OFF management

Set beep Sound ON/OFF

Decimal point of SD card setting

SD memory card Format

Frequency weighting to A or C setting

Over Indication

Show " - - - - ".

Data Hold

Freeze the display reading.

Memory Recall

Maximum & Minimum value.

Sampling Time of Display

Approx. 1 second.

Data Output

RS 232/USB PC computer interface.

Connect the optional RS232 cable UPCB-02 will get the RS232 plug.

Connect the optional USB cable USB-01 will get the USB plug.

Power off

Auto shut off saves battery life or manual off by push button.

Operating Temperature

0 to 50 °C.

Operating Humidity

Less than 85% R.H.

Power Supply

Alkaline or heavy duty DC 1.5 V battery ( UM4, AAA ) x 6 PCs, or equivalent.

DC 9V adapter input. ( AC/DC power adapter is optional ).

Power Current

Normal operation ( w/o SD card save data and LCD Backlight is OFF) :

Approx. DC 16 mA.

When " SD " save the data but and LCD Backlight is OFF) :

Approx. DC 35 mA.

* If LCD backlight on, the power consumption will increase approx. DC 8 mA.

Weight

250 g/ 0.55 LB. (without battery)

Dimension

132 x 80 x 32 mm.

( 5.2 x 3.1 x 1.3 inch ).

Accessories Included

* Instruction manual....................... 1 PC

Soft carrying case, CA-05A… … … …1 PC

Microphone with clip……………… 1 PC

Hanging unit ( with sticker ).......... 1 PC

Optional Accessories

Sound calibrator ( 94 dB ), SC-941.

Sound calibrator ( 94/114 dB ), SC-942.

Sound wind shield ball, SB-01

SD Card ( 4 GB )

USB cable, USB-01.

RS232 cable, UPCB-02.

Data Acquisition software, SW-E2005.

AC to DC 9V adapter.

Personal sound exposure meet IEC 61252

* Frequency and Time weighting are designed to meet IEC 61672 class 2.

* A & C weighting networks comply with standards.

* LCD is dot-matrix with backlight and easy reading.

* Combination Dose meter, Data-logger and Sound level meter.

* 0.5" standard microphone head.

* Time weighting (Fast & Slow) dynamic characteristic modes.

* Build External calibration VR.

* User-defined measurement configurations. Selectable Criterion Level,

* Exchange Rate, Threshold, Frequency Weighting, and Response Time setting.

* Condenser microphone for high accuracy & long-term stability.

* Memory function to store the Max. & Min. value.

* Hold functions.

* Real time Datalogger

Records device of internal memory device (EEPROM) and an external memory device ( SD memory card ) ,Real time Datalogger, it Built-in Clock and Calendar, real time data recorder, sampling time set from 1 second to 3600 seconds.

* Manual datalogger is available ( set the sampling time to 0 second ).

* Innovation and easy operation, computer is not need to setup extra software, after execute datalogger, just take away the SD card from the meter and plug in the SD card into the computer, it can download the all the measured value with the time information ( year/month/date/ hour/minute/second ) to the Excel directly, then user can make the further data or graphic analysis by themselves.

* SD card capacity : 1 GB to 16 GB.

* Can default auto power off or manual power off.

* Noise Dose %,SPL measurements.

* Microcomputer circuit, high accuracy.

* Power by UM4/AAA ( 1.5 V ) x 6 batteries or DC 9V adapter.

* RS232/USB PC COMPUTE 1

* Heavy duty & compact housing case.