General |
Accuracy | ANSI S1.4 & S1.43,IEC 61672-1 2002-5 |
Frequency filters comply with | ANSI S1.11 and IEC 61260 |
Microphone type | 1/2" Free field Electret microphone & preamplifier Type 1 or Type 2 on a removable CEL-495 preamplifier |
Reference Conditions | 68°F (20°C) air temperature, 65% Relative Humidity, 1013 mbar (101.325 kPa) atmospheric pressure. |
Operating Temperature Range | 14 to 122°F (-10 to 50°C) (Class 1) 32 to 104°F (0 to 40°C) (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 NiMH rechargeable types |
Battery Life (hours) | Up to 12 hours without backlight |
Dimensions (W x H x D) | 2.8 x 10.5 x 1.2 in (71.5x 267.0x 31.0mm) including preamplifier and microphone |
Weight including batteries | 10.1 oz (< 291g) |
Tripod socket for fixed measurements | Yes via standard camera thread (1/4" size) |
Operator controls | 8 buttons for power On/Off + 2 x context sensitive menu selection + 4 navigation + confirm selection |
Performance |
Total measurement range (dB) | 20 to 140 |
Dynamic range on single measurement span (dB) | 120 |
Noise floor (A weighted dB) | < 20 (Class 1),< 25 (Class 2) |
Frequency weightings | Simultaneous A,C & Z (unweighted) |
Time weightings | Simultaneous Slow,Fast and Impulse |
Amplitude weightings (Exchange rate) | Simultaneous Q=3,Q=4 and Q=5 dB |
Displayed parameters available as per user selected list or using pre-configured setups (depending on model) | Lp,Lmx,Lmn,Lpk Leq,LIeq,LDOD,Lavg,LAE,Ltm3,Ltm5 LDN,LDEN,CNEL,5 x LN% |
Narrow band real time measurements | (B version) 11 octave bands 16 Hz to 16 kHz (C version) 33 third octave bands 12.5 Hz to 20 kHz with cursor readout plus A & C & Z broad band levels |
Display of octave and third octave band levels | Graphical spectrum including broad band values & With listing of individual band levels in tabular format |
Measurements in octave (& 1/3) band mode include | Lmx and Leq with selected freq and time weightings |
Display type | 240 x 320 full color dot matrix LCD digital including real-time analog bar graph scale |
Data storage for time history logging - periods and profiles (depending on model) 1 Gb internal memory | 999 run maximum memory,long term recording is separated into "24 hr days" that can be recombined in Insight software for later analysis and review (sold separatly) |
Timed interval for regular data storage -632 & 633 models | 1 sec to 1 hour in 13 fixed intervals |
Time history Profiles -632 & 633 models | 1 sec to 30 mins in 12 fixed intervals |
Event capture above user selectable -632 & 633 models | User selectable trigger level 40 - 140 db in 1 dB steps |
Displayed time span for time history graph on LCD | Last 60 seconds |
Audio recording voice notes at start of run or on event | User selectable sample rate and duration in wav format |
Signal detected when calibrator placed over microphone at 1 kHz frequency | Calibration level set to 114.0 or 94.0 dB With +/-1 dB span and 0.1 dB resolution by user |
External power option (12 Vdc) or via USB 5V line | Yes via universal CEL-PC18 unit |
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 22kΩ. |
DC output | 0 to 1.3V DC for FSD on selected range |
Digital output of stored result sets | Via USB 2.0 mini B connector to Casella Insight program |
Audio recording | Voice notes can be stored at the start of a run in wav file |