Summary of DT-8852
Page 1
Sound level meter instruction manual rec fast a/c.
Page 2: 1. Safety Information
2 1. Safety information read the following safety information carefully before attempting to operate or service the meter. Use the meter only as specified in this manual： z environment conditions ① altitude lower than 2000 meters ② relatively humidity ≤90％rh ③ operation ambient 0 ~ 40℃ z maintenance...
Page 3: 3. Specification
3 measurement. It is applied to the sounds measurement at factory; school; office; traffic access and household, etc. Z this unit confirms to the iec61672-1 class2 for sound level meters. Z max & min measurements z over range display z under range display z a & c weighting z fast & slow response z a...
Page 4: Display:
4 frequency weighting: a/c time weighting: fast ( 125ms ), slow ( 1s ) microphone: 1/2 inch electret condenser microphone display: 4 digits lcd display with a resolution of 0.1db display update: 2 times/sec. Max hold: hold the maximum reading min hold: hold the minimum reading hold: hold the reading...
Page 5: Power Supply
5 power supply : one 9v battery, 006p or neda1604 or iec 6f22. Power life : about 30hours operation temperature and humidity: 0℃~40℃,10％rh~90％rh storage temperature and temperature: -10℃~+60℃，10％rh~75％rh dimension : 278 (l) x 76 (w) x 50(h) mm weight : 350g accessories : instruction manual, battery,...
Page 6: Windscreen
6 dc 9 v ou t p u t ca l 18 12 13 14 15 16 17 ① windscreen ② lcd：.
Page 7
7 symbol function lcd 4 digits max maximum hold min minimum hold over over range under under range fast fast response slow slow response dba a-weighting(responseto human sense) dbc c-weighting(response to machine monitor) 30—130 range indicate rec recording data into computer auto auto level range s...
Page 8: Button
8 ③ rec button 3.0 datalogger function press “rec” button after it power on, the display will show “rec” to start data recording，press the button again to exit the record (note: in order to avoid data error, please don’t power it off under rec condition, when the rec function is deleted then it can ...
Page 9: 3.2 Data Zero Function
9 3.2 data zero function press the button continuously before power it on， loosen the button when the display showing‘clr’ after the meter power on ， which indicates that the data in datalogger has been deleted. ④ setup button 4．0．the time chip adjustment press‘setup’button and then power it on，when...
Page 10
10 press the‘setup’button second time, the display showing： the display showing “minute” adjustment mode, press ‘ level’ to make the adjustment，press ‘hold’ to keep the setup； press the‘setup’button third time, the display showing： the display showing “hour” adjustment mode, press （ h-p=p.M ， h-a=a....
Page 11
11 the display showing “date” adjustment mode, press ‘ level ’ to make the adjustment ， press ‘ hold’to keep the setup； press the‘setup’button fifth time, the display showing： the display showing “month” adjustment mode, press ‘ level’ to make the adjustment，press ‘hold’ to keep the setup； press the...
Page 12: Fast/slow
12 ‘ level’ to make the adjustment，press ‘hold’ to keep the setup； press the‘setup’button seventh time, the display showing： the display showing initialization of the time chip， press ‘hold’to keep the setup；time and date have returned to factory setup. When the battery is exhausted or replaced, if ...
Page 13
13 time weighting selection fast：fast sampling measurement, 1 time per 125ms. Slow：slow sampling measurement, 1 time per second. ⑥ max/min button: maximum and minimum hold press this button for one time to enter max/min measurement, ‘max’ will appear on lcd, maximum sound level will be captured and ...
Page 14: Backlight Button
14 ⑧ backlight button 8．0．turn the backlight on/off 8．1．datalogger response setting; press the button continuously until‘int’ symbol appears after the meter turn on, press ‘ level’to set up the data memory response, then press‘hold’to keep the setting. ⑨ frequency weighting select button a：a-weighti...
Page 15: External Dc 9V Power Supply
15 press “hold” button, the hold function freezes the reading in the display. ⑾ power button turn the meter power on/off ⑿ external dc 9v power supply terminal for connection with dc 9v power supply. Aperture size: external diameter: 3.5mm, internal diameter: 1.35mm ⒀ usb interface usb signal output...
Page 16: Calibration Potentiometer
16 output ground output ac dc ac： output voltage：1vrms corresponding to each range step. Output impedance： 100Ω dc： output voltage： 10mv/ db output impedance： 1kΩ ⒂ calibration potentiometer （ call） for external standard level calibration adjustments. ⒃ tripod mounting screw ⒄ battery cover ⒅ microp...
Page 17: 5. Calibration Procedures
17 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...
Page 18: 7. Operating Procedure
18 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 will appear on lcd. Replace the 9v battery. ④ when the ac adapter is used, insert the plug of the adapter （3.5φ） into the dc 9v connector on the side panel. ...
Page 19: 8. Notice
19 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 i. Do not store or operate the instrument at high temperature and high humidity environment. Ii. When not in use for long time, please take out the battery to avoid battery l...
Page 20
20 10. Installing the software 1.0 start windows 1.1 insert the cd into the cd-drive. 1.2 run setup.Exe installation program in file disk1, install it to the referred directory 1.3 install cp210x drive software： connecting the meter with the computer by usb interface, install cp2102 drive software i...
Page 21
21 usb_driver. 2. Connect the usb to the computer, the windows system will show finding a new hardware. Choose specific directory c:\ usb_driver according to the instruction. 3. After driver installation, a new com port will be added to the ports in the device manager. Port number will be ranged fol...
Page 22
22 1.5 enter the menu real time\‘setup’to set the monitoring data(data volume, response, monitoring time) 1.6 datalogger menu: the computer read the memory data in the meter when rec not appear on the display and the connection is in order..