The LA-4440 features is a compact, type 1 sound level meter equally capable in environmental noise monitoring or product noise measurements. This unique instrument has an extremely wide dynamic range and requires no adjustment of the input level prior to measurement.
The LA-4440 features USB and RS-232 interfaces, as well as analog outputs, contact inputs for external control, and a large memory for logging and saving measurement results.
Specifications
| LA-1411 | LA-1441 | LA-4441 | |
| Applicable standard | IEC 61672-1：2013 Class 2 | IEC 61672-1：2013 Class 1 | |
|
JIS C 1509-1：2017 Class 2 |
JIS C 1509-1：2017 Class 1 | ||
| Microphone |
1/2-inch backelectret-type |
1/2-inch backelectret-type |
|
| Preamplifier |
MI-3111 Preamplifier for microphone |
||
| Linearity range |
100 dB (Wide range), 80 db (Normal range) |
||
| Measurable frequency range | 10 Hz to 8 kHz(IEC, JIS) | 10 Hz to 20 kHz(IEC, JIS) | |
| Measurement level range | Ａ：26 to 135 dB(IEC, JIS) C：31 to 135 dB(IEC, JIS) Z：36 to 135 dB(IEC, JIS) |
A ：27 to 135 dB(IEC, JIS) C：30 to 135 dB(IEC, JIS) Z：35 to 135 dB(IEC, JIS) |
|
| Frequency weighting |
A，C，Z |
||
| Intrinsic noise |
A：20 dB or less |
A：19 dB or less |
|
| Level range |
20 to 90 dB, 30 to 90 dB, 40 to 100 dB, 50 to 110 dB, 60 to 120 dB (Normal range) 70 to 130 dB, 40 to 120 dB (Wide range) |
||
| Time weighting |
FAST, SLOW |
FAST, SLOW, Impulse, 10 ms | |
| Measurement items | Lp, Leq , LE, Lmax, Lmin, Lpk, LＮ(LHI, L5, L10, L50, L90, L95, LLO, LAV) | ||
| Level trend | Ｌp, every kind of calculated value | 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) |
20.83 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 (Hour, minute), trigger (can be started after a lapse of specified time [0 to 10 seconds, in increments of 1 second] after trigger detection: trigger delay function) | |
| Internal calibration signal (REFOUT) | 1 kHz sine wave (for upper limit level range: -6 dB (normal range), -16 dB (wide range) | ||
| Recommended sound calibrator | Ono Sokki SC-2500, SC-3120A, or SC-2120A (for LA-1411 and LA-1441A only) | ||
| 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. |
||
| 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 Pulse width: 100 ms or more |
|
| 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 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 |
|
||
- *AC or DC output is selectable from menu of sound level meter.
- *Comparator function (LA-0141, option) cannot be installed with the LA-1411.
- *The cable length given here is the length when each of the exclusive cable sold by Ono Sokki is used. The cable length of less than 30 m is applicable to CE marking.
