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ACO 6226 Instruction Manual

Integrating sound level meter
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Integrating Sound Level Meter
TYPE 6226
Instruction Manual
(Version 1.5Pc)
ACO Co.,Ltd.

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Summary of Contents for ACO 6226

  • Page 1 Integrating Sound Level Meter TYPE 6226 Instruction Manual (Version 1.5Pc) ACO Co.,Ltd.
  • Page 2 To prevent bodily injury or damage to property, the following safety precautions must be observed. This manual contains important safety and operating instructions for Integrating Sound Level Meter TYPE 6226. Read all instructions, before using the instrument. After reading all instructions, keep this manual for quick reference １．Expressions of safety instructions...
  • Page 3 To reduce risk of injury, take it to a qualified serviceman when service or repair is required. Please contact ACO co. or the dealer when service or repair is required. Do not substitute parts or modify instrument. It causes bodily injury, fire or shock hazard.
  • Page 4 ３．Cautions for usage Integrating Sound Level Meter TYPE 6226 is assembled with precision parts. To prevent bodily injury or damage to the instrument, the following cautions must be observed. CAUTION Keep the instrument away from the children. If the instrument falls down, it is very dangerous.
  • Page 5 Results of measurements are displayed on a LCD screen as a bar graph and numerical values. TYPE 6226 can display wide dynamic range of 100dB, so that you don’t need to change ranges. It is easy to use.

  • Page 6: Table Of Contents

    Contents Section 1 Setting up 1. Locations and their functions P. 6 2. Battery installation P. 7 3. AC power adaptor P. 7 4. LCD adjustment P. 8 5. Calendar adjustment P. 9 6. LCD back-light P.10 Section 2 Basic Operation 1.

  • Page 7: Section 1 Setting Up

    Section 1 Setting up 1. Locations and their functions Microphone Preamplifier Threaded retaining ring Front panel Female screw for tripod Battery cover Display Side panel Female screw for tripod Side panel Calibration potentiometer AC OUT connector DC OUT connector POWER switch AC power adaptor connector External Input/Output connector...

  • Page 8: Battery Installation

    2. Battery installation When LCD display tells low battery, install new batteries. For long-term measurement, install new batteries in advance. The following displays tell you the condition of the batteries. Full Replace batteries. To install new batteries: １）Turn off the POWER switch. ２）The slide is done while pushing the battery lid by the thumb.( Refer to the figure below) ３）Put the new batteries in the case, then shut the cover.

  • Page 9: Lcd Adjustment

    4. LCD adjustment You can adjust LCD contrast, when the batteries were low, or when the new batteries were installed. The procedure is as follows. Menu key Cursor key Set key View key 1) When you press the Menu key, the following screen appears. <menu>...

  • Page 10: Calendar Adjustment

    5. Calendar adjustment To adjust the calendar (time), operate as follows. You can adjust calendar in the Menu mode in the same way as LCD adjustment. Menu key １）When you press the Menu key, the following screen appears. <menu> Cursor key Meas Mode : Manu Set key...

  • Page 11: Lcd Back-Light

    6. LCD back-light You can use LCD back-light, when your measurement is carried out in the dark situations. Light key (ア) Press Light key, LCD back-light goes on. (イ) If you press Light key again, LCD back-light goes out. The light automatically goes out in about 30 seconds after the light goes on. (ウ) When the batteries is low, LCD back-light dims.

  • Page 12: Section 2 Basic Operation

    Section 2 Basic Operation 1. Changing Display mode 1－1 How to change the display mode Display has three modes (normal, magnified and list mode). You can change them with View key. You can use View key to go back to this display mode from any other menu screen. View Normal display mode 00h 000h00m00s...
  • Page 13 1－2 Normal display mode →: Operation indicator → Blinking : in operation (by pressing Start key) ■ : Pause (by pressing Pause key). When Data deletion mode is set, this symbol does not appear. E : Data deletion mode E appears when Data delet was selected in Menu. When Meas Time is 1, 3 or 5s, E does not appear.
  • Page 14 1－3 Magnified display mode In magnified display mode, bar graph does not appear. And the numerical characters are magnified in the digital display. After you have changed to the magnified display mode, you can change measurement mode (A-weighted sound pressure level [or sound pressure level] measurement or the equivalent continuous A-weighted sound pressure level measurement) with Mode key.

  • Page 15: Operation Of Panel Switches And Their Function

    2. Operation of panel switches and their function Cursor key ● Light : LCD back-light key See “LCD adjustment” on Page 11. ● Menu : Menu key See “Section 4 Menu” ● Set : Set key on Page **. ● Cursor key : is used to move a cursor to select a item.

  • Page 16: Calibration

    3. Calibration You need to calibrate the instrument regularly before you start taking measurements. There are two types of calibration. One is the way using the internal generator, the other is the way using the pistonphone. Note that calibration is disabled when “Peak measurement” is selected.
  • Page 17 ※ After the calibration of the pistonphone, perform calibration per 3.1 “Calibration using internal generator” in Page 15. If there is a difference of more than ±0.5 dB for 94.0 dB, the instrument shall be checked. Please contact ACO or authorized dealer.

  • Page 18: Section 3 Measuring Procedure

    Section 3 Measuring Procedure This meter has two major basic settings. One is “General measurement” which is for general environmental noise measurement; the other is “Peak measurement” which indicates waveform peak hold. The 1 to 5 section of following measurements is on “General measurement” setting.

  • Page 19: Sound Pressure Level (L C /L F ) Measurement

    2. Sound pressure level (L ) measurement (Sound pressure level measurements except A-weighted sound pressure level.) Frequency weighting key (A ・C , Flat) Time weighting key (Fast ･Slow, Impulse) Range key Measurement mode key ＜ Parameter setting ＞ Range key: Select a range that Bar display indicates approximately 2/3 of the full scale. Time weighting key: Fast or Slow Frequency weighting key:...
  • Page 20 3. Equivalent continuous A-weighted sound pressure level (L eq) measurement Frequency weighting key (A ・C , Flat) Time weighting key Measurement time (Fast ･Slow, Impulse) Range key Measurement mode key ＜ Parameter setting ＞ Range key: Select a range that Bar display indicates approximately 2/3 of the full scale. Time weighting key: Fast or Slow Frequency weighting key:...

  • Page 21: Equivalent Continuous A-Weighted Sound Pressure Level (L A Eq)

    4. Single event sound exposure level (L e) and Percentile level (Lx) measurement In the measurement of L eq or L , the following nine values of the measurement time are automatically calculated from the point of pressing Start key. So you can acquire the L e and Lx without another operations.

  • Page 22: Maximum A-Weighted Sound Pressure Level (Lmax) Measurement

    5. Maximum A-weighted Sound pressure Level (L ax) Measurement In the measurement of L eq or L e, the following measurements automatically start by pressing Start key. ・Equivalent continuous A-weighted sound pressure level: ・Single event sound exposure level: ・Percentile level: , Lmin or Lmax So the operation is same as L eq measurement.

  • Page 23: C-Weighted Waveform Peak Hold Measurement (Lcpeak )

    6. C-weighted waveform peak hold measurement (L CPeak Lcpeak is measured on “Peak measurement” setting. At first, change the basic setting from Manu (default) to Peak. Press Menu key once to call <Menu>1/2 screen and check the cursor is on the top line of “Meas Mode”.

  • Page 24: Section4

    Section 4 Menu 1. How to use Menu You can change to Menu display by pressing Menu key. You can return to the measurement display by pressing View key. Menu key Set key Cursor key Every time you press Menu key, <menu> and <Mode Set> pages are alternated. Select an item with key and complete the selection with key, then change...
  • Page 25 2. Menu (1/2) <menu> Page of Menu Meas Mode : Manu Interval : Single : OFF Data delet : OFF LCD cont : ***** date y/m/d : 00/01/01 time : 00:00:00 Items Initial value Explanation ● Meas Mode ：Manu ：Basic setting Manu ：General measurement Remote...

  • Page 26: Mode Set

    3. Mode Set (2/2) <Mode Set> Range : 130dB Dyn cher : FAST Freq corr Meas time : 1s View : L05 baud rate : 9600 ● Range ：130dB ：Shows a range value set with Range key. ● Dyn cher ：FAST ：FAST , SLOW or Imp.

  • Page 27: Section 5 Ac、Dc Output

    Section5 AC、DC Output 1. AC Output The AC Output is the frequency-weighted signal. Output: 1Vrms (FS), Output impedance: 600Ω, Load impedance > 10kΩ 2. DC Output The DC Output is the frequency-weighted, root-mean-square-detected, and then logarithmic converted signal. Output: 2.5V (FS), 0.25V/10dB, Output impedance: 50Ω, Load impedance > 10kΩ...

  • Page 28: Section 6 Data Transfer To A Personal Computer

    Section 6 Data Transfer to a Personal Computer After or during measurement, you can transfer the data to a personal computer. ●Operating system software: Microsoft Windows 98SE/2000/XP/Vista/7 * Windows 7 supports 32bit, 64bit. 1) Data transfer after measurement You can transfer the data to a personal computer with an optional cable and a software. You can open the data directly with spreadsheet software.

  • Page 29: Section 7 Specifications

    Section 7 Specifications 1） Model TYPE 6226 2） Description Integrating Sound Level Meter 3） Standards conforms with JIS C 1502, IEC 60651 Type 2, IEC 60804 Type 2 ±1dB 4） Accuracy 5） Measuring ranges(JIS) 28 – 130dB(A), 33 – 130dB(C), 38 – 130dB(F) 6）...

  • Page 30: Pin Connections And How To Conect The Extension Cable

    Pin Connections and How to Connect the Extension cable 1) Detach microphone from the body of the meter. Microphone The threaded reraining ring ① Turn the threaded reraining ring a little to the left. ② Pull out microphone as shown. ③...
  • Page 31 3) Attach microphone to the female connector of extension cable. Mach key ⑦Mach key groove of body’s connector with the connector of extension cable and insert. ⑧Push the connector of extension cable. ⑨Turn the threaded reraining ring a little as shown repeat ⑧ and ⑨ 5-8 times and you can connect.
  • Page 32 ＜Appendix＞ Appearance diagram of Sound Level Meter TYPE 6226...
  • Page 33 ＤＡＴ ＣＲ ＬＦ 0Dh 0Ah Data： (ASCII) Variable size Command：1Byte (ASCII) 3．Command table（ＣＭＤ） Capital letters pertain to PC command Small letters pertain to 6226 command 6226 Function Item ↑ ↑ Function Outline 6226 Time and date setting request Ｔ Time and date setting completed ｔ...
  • Page 34 4．Detail of Command Type of Function Item Outline of Functions data Time and date ASCII(13) YYMMDDHHMMSS setting request ｔ Time and date Without data part setting completed Ｆ Transfer ASCII(6) Ａ Ｂ Ｃ Ｄ Ｅ Ｆ Configuration file Ａ ：Meas Time Setting（１） ０；＊＊＊...
  • Page 35 ５．Preparation（To Remote mode） Select Remote Mode manually <Menu> Meas mode : Remote Interval : Single : OFF Date delet : OFF LCD cont : ***** Date y/m/d : 00/01/01 Time : 00:00:00 Display changes into [Remote] inhibiting any other key access than Menu. 00h 000h00m00s FAST 130.0...
  • Page 36 ６．Communication timing 6-1 After Power On 6226 Waiting Various Command(T，F，S，E，D，U，C，L，R，A，P) Command Data and Answer 6-2 Transfer Configuration file 6226 F00000：The following setup will be sent. MeasTim ：＊＊＊ Range ：130dB Filter ：A Time constant ：Fast ：Single nterval Return ｆ 6-3 Start measurement ／Stop measurement 6226 Ｓ...
  • Page 37 Data transfer Data <Data format > (5Byte + CR ) 130.0 + CR 6-6 Notes ・Flow control is not available in 6226. ・For communication command error, the ？ mark is returned. ・To return to Calibration, Stop measurement command Ｅ is used.
  • Page 38 Sound-level meter / Data management software NA-0226-4 This software collects data measured with an Aco sound-level meter in a PC for processing. The data can be collected after or during measurements. Please choose the method that best suits your needs.
  • Page 39 In addition, you can print out the following style list on A4 size paper. ACO sound level meter / Data management software 100dB Frequency Weighting characteristic: Frequency Weighting: A Time weighting : Fast Installation ACO sound-level meter Copy the folder to the directory you want to use on the hard disk.
  • Page 40 Transmitting data after measurement 1. Settings for data measurements <menu> Meas Mode :Manu Interval :Repeat :Off Data delet :Off LCD cont :**** date y/m/d :00/11/20 Press Menu Time :11:30:26 <Mode Set> Range :100dB Dyn charF :FAST Freq corr Meas time :*** <menu>...
  • Page 41 Transmitting data while making measurements Connect the sound-level meter and the PC >>Settings on the PC side (The settings are the same as when transmitting data after measurements) >>Settings for and operation of the sound-level meter. <menu> Meas Mode :Manu Interval :Off :Off...

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