Accuracy: | ANSI S1.4 Type 2,IEC 61672-1 2002-5 |
Microphone type: | 1/4" Electret mic. in standard 1/2" fixed housing |
Reference Conditions: | 68ºF (20ºC) air temperature,65% Relative Humidity,1013 mbar (101.325 kPa) atmospheric pressure |
Operating Temperature Range: | 32 to 104ºF (0 to 40ºC) (Class 2) |
Effect of Humidity: | Less than ±0.5dB over the range 30 to 90% RH (non-condensing),rel. to value at ref. conditions |
Operating pressure range: | 650 to 1080 mbar (65 to 108 kPa) |
Batteries: | 3 x AA Alkaline or rechargeable types |
Battery Life: (hours) | At least 35 hours |
Dimensions w x h x d: (in/mm) | 2.8 x 8.3 x 1.2 in (71.5x 212.0x 31.0mm) including preamplifier and microphone |
Weight including batteries: (oz/gm) | 8.8 oz (< 250g) |
Operator controls: | buttons for power On/Off and 2 x context sensitive menu selection plus initial configuration screen |
Total measurement range (dB) | 30 to 130 |
Dynamic span on single range (dB) | 70 |
Number of measurement ranges - 2 ranges (Low and High dB) | (30 - 100 & 60 - 130) |
Noise floor (A weighted dB) | < 33 |
Frequency weightings | A and C |
Time weightings | Slow,Fast and Impulse |
Displayed parameters always available on all user available screens | Instantaneous level - Lp,Maximum level - Lmx |
Reset of maximum level from key press by user | Yes - with non-decaying max hold |
Display type | 128 x 128 dot matrix LCD digital including real-time analog bar graph scale |
Display resolution - numeric (dB) | 0.1 |
Display resolution - graphical (dB) | 1 |
Update rate for display (seconds) | 0.5 |
Displayed time span for time history chart (minutes) | Last 1 or 5 |
Calibration method | Automatically recognized by meter |
Signal detected when calibrator placed over microphone at 1 kHz frequency | Calibration level set to 114.0 or 94.0 dB |
External power option (5 Vdc) | Yes with CMC51 cable via USB socket |
Analog outputs | AC (and optional DC) via 2.5 mm jack socket |
AC output characteristics - (Provided for DAT tape / PC wav file recording or headphone applications) | Approx 0.85V RMS FSD output on selected sound level measurement range. Minimum load impedance 22kW. |
DC output characteristics - (Provided at time of order as option for connection to chart recorder or pc data logging system) | 0 to 1.3V DC for FSD on selected range. Output corresponds to selected frequency and time weighting. 2kW Output impedance |
Digital output | USB 2.0 format of instantaneous sound level via 'mini A' USB socket (also powers meter) |
Digital output characteristics - (value output once per second) | Instantaneous SPL output (software required) as per selected frequency and time weightings |
Features available on meter | Basic data logging to internal memory |