| 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 |
