LA-1410 | LA-1440 | LA-4440 |
Tiêu chuẩn áp dụng | IEC 61672-1 : 2002 Loại 2 | IEC 61672-1 : 2002 Loại 1 |
JIS C 1509-1 : 2005 Lớp 2 | JIS C 1509-1 : 2005 Lớp 1 |
Cái mic cờ rô | Micrô tụ điện kiểu backelectret 1/2 inch MI-1432 Mức độ nhạy danh nghĩa: -29 dB | Micrô tụ điện kiểu backelectret 1/2 inch MI-1234 Mức độ nhạy danh nghĩa: -29 dB |
Bộ tiền khuếch đại | Bộ tiền khuếch đại MI-3111 cho mocrophone |
Phạm vi tuyến tính | 100 dB |
Dải tần số có thể đo lường | 10 Hz đến 8 kHz (IEC, JIS) | 10 Hz đến 20 kHz (IEC, JIS) |
Dải mức đo lường | A : 26 đến 137 dB (IEC, JIS) C : 31 đến 137 dB (IEC, JIS) Z : 36 đến 137 dB (IEC, JIS) | A : 27 đến 137 dB (IEC, JIS) C : 30 đến 137 dB (IEC, JIS) Z : 35 đến 137 dB (IEC, JIS) |
Trọng số tần số | A , C , Z |
Tiếng ồn nội tại | A : 20 dB trở xuống C : 25 dB trở xuống Z : 30dB trở xuống | A : 19 dB trở xuống C : 22 dB trở xuống Z : 27dB trở xuống |
Phạm vi mức độ | 20 đến 90 dB, 30 đến 90 dB, 40 đến 100 dB, 50 đến 110 dB, 60 đến 120 dB, 70 đến 130 dB, 40 đến 120 dB |
Trọng số thời gian | NHANH, CHẬM | NHANH, CHẬM, Xung, 10 mili giây |
Các mục đo lường | L p , L eq , L E , L max , L min , L pk , L N (L HI , L 5 , L 10 , L 50 , L 90 , L 95 , L LO , L AV ) |
Xu hướng cấp độ | Lp , mọi loại giá trị được tính toán | Lp, every kind of calculated value (Read out the displayed value as auto memory call) |
Sampling interval | 31.25 μs (other than LN ) 100 ms(LN) | 20.8 μs (other than LN) 100 ms(LN) |
Measurement time | Manual, arbitrary setup (199 h 59 m 59 s max.) |
Total measurement time | --- | Arbitrary setup (199 h 59 m 59 s max.) |
Start mode | Manual only | Manual, timer (time setting, in increment of 1 second), trigger (can be started after a lapse of specified time [0 to 10 seconds, in increment of 1 second] after trigger detection: trigger delay function) |
Calibration | Electrical calibration by internal calibration signal (1 kHz sine wave), calibration by external sound calibrator |
Recommended sound calibrator | SC-3100A Sound calibrator (piston-phone type) |
Display | LCD with LED backlight semitransparent (124 x 64-dot) Measurement value display by numeric and bar indicators List display and trend graph display for various kinds of calculated values Displays of date, time, measurement time, and conditions of various kinds of instruments |
Display update time | Display by numeric:1 s, display by bar indicator: 0.1 s, trend screen: 0.2 s |
Manual memory function | Total calculated values: 100 addresses |
Auto memory function | --- | Leq: 1000 addresses x 200 blocks Total calculated values: 100 addresses x 200 blocks |
Lp Record memory function | --- | Sound level with time weighting is stored at the specified interval. (1000 address × 200 blocks) Storing intervals (1 ms, 2 ms, 5 ms and 10 ms) |
Measurement condition memory function | Condition memories (9 kinds) |
Resume function | Settings activated at power ON can be selected from follows; settings used at previous power OFF, factory setting, and any condition memory number which is set from menu. |
Backup function | The backup of data stored in clock and memory can be performed by built-in secondary power source. • Time for full charged: approx. 24 hours • Backup period: more than 3 months (when stored at temperature of 23 °C) |
AC output *1 | 0.707 Vrms/F.S (normal range), 2.238 Vrms/F.S. (wide range), load resistance 10 Ω or more (with upper-limitation value of bar indicator) Frequency weighting can be selected: conjunction with selected frequency weighting or fixed to Z-weighting. |
DC output *1 | 2.5 V/F.S. (with upper-limitation value of bar indicator) Amount of voltage fluctuation per 10 dB: 0.25 V Load resistance: 10 kΩ or more |
External control input | --- | Operation: toggle operation of start/place in pause Specifications of hardware: negative pulse input (voltage level: Low:0.0 to 0.5 V, Hi:3.0 to 50 V) Pulse width: 100 ms or more Absolute maximum rated input voltage: 5 V |
Comparator function (Option: LA-0141) *2 | --- | Set comparison value:40.0 to 130.0 dB (in increment of 0.1 dB) Comparison item:Lmax or Lpeak Delay time:0 ms, 100 ms, 1 s, 5 s HOLD time:100 ms, 1 s, 5 s, manual Output logic: negative or positive logic Output format:open collector (withstand voltage:+3 to +24 VDC, current:50 mA or less) |
Timer function | Built-in (year/month/day/hour/minute) |
RS-232C | --- | Control of operation, data output, print out (to the DPU-414 printer) Baud rate:9,600/115,200 bps |
USB | --- | Control of main unit and data output, print out (to BL-112U printer) USB2.0 FULL SPEED (connecting virtual COM port) |
Cable extension *3 (Between microphone and main unit) | 305 m max. | 105 m max. |
Power requirement | Type AA battery × 2 pcs. (manganese (6R) or alkaline (LR6) or oxyride (ZR6)) or PB-7090 AC adapter (option) |
Battery life (continuous using) | Approx. 8 hours (LR6 alkaline battery in use / 23 °C/ backlight off / not RS-232C・USB in use) |
Operating (storage) temperature range | -10 to 50 °C (-20 to 60 °C) |
Operating (storage) humidity range | 25 to 90 %RH (10 to 90 %RH) with no condensations |
Outer dimensions | Approx. 78(W) × 263(H) × 47(D) mm |
Weight (including batteries) | Approx. 375 g(including batteries) |
Accessories | Windscreen×1 (φ 70 mm), carrying case×1, hand strap×1, type AA battery × 2 pcs. |
Option | LA-0141 Comparator output SC-2120A Sound calibrator (speaker type) SC-3100A Sound calibrator (piston-phone type) AG-2010 Microphone extension cable (10 m) AG-2030 (30 m) Microphone extension cable (30 m) AG-2050 (50 m) Cáp nối dài micrô với cuộn mã (50 m) AG-2100 (100 m) Cáp nối dài micrô có cuộn mã (100 m) Chân máy LA-0203C cho máy đo mức âm thanh Bộ đổi nguồn AC PB-7090 (100 đến 240 VAC) Cáp tín hiệu vào-ra AX-501 (2 m) Cáp AX-5022 RS-232C cho PC (2 m) Máy in nhiệt DPU-414 (Cáp AX-5024 RS-232C cho máy in (2 m) được cung cấp theo tiêu chuẩn) Bộ đổi nguồn AC PW-C0725-W1-U (100 đến 240 VAC) cho DPU-414 BL-112UI Máy in nhiệt được đề xuất với giao diện USB (của SANEI Electronics)
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