Class 1 Risk Assessment/ Environmental System – IC-NK002C

Measuring noise really does not have to be complicated, even for the novice, and the Castle GA6224 (Class 1) Integrating Sound Level Meters is designed with this in mind. These meters are ideally equipped for carrying out Noise at Work Risk Assessments, as well as the majority of environmental survey work. The range of parameters measured, the wide measuring capability of the meters and the ease of use, mean that this equipment is suitable for anything from aircraft noise to lawnmower design, and from construction sites to laboratories.

The GA6224 provide the essential measurements required by the Control of Noise at Work Regulations 2006, including Leq (equivalent continuous level) in A and C weightings, and Cpeak. The meters can data-log any of these parameters in up to 10,000 data-memories, making it more than powerful enough for the task in hand. Also ideally suited to environmental monitoring, these meters can measure 5 selectable percentile values and sound exposure (LE). Most environmental measurements require Leq and L90 plus possibly one or two other measurements. These can all be measured simultaneously and data-logged into its 10,000 data-point memory.

The Castle GA6224 (Class 1) also has an easy to follow menu systems and clearly marked keys, all designed to make the meter simple-to-use. The back-lit LCD display is also very clear with large figures and a quasi-analogue display bar to show the changes in sound level as they happen.

Other features:

– Equivalent continuous level (Leq)
– 5 user selectable percentile values (Ln)
– Wide Linearity range of 90dB
– RS232 for data output to optional software
– Memory storage for 10,000 datapoints
– Back-lit LCD display

Specifications

– Standards: Conforms with IEC 61672-1:2002, Class 1, IEC 60651:1979 and IEC 60804:2000
– Measuring ranges: 27 to 130dB(A), 38 to 130dB(C), 41 to 130dB
– Frequency range: 20Hz to 20kHz
– Microphone: 7146N 1/2 electret condenser microphone
– Time weighting: FAST, SLOW, IMPULSE
– Peak range: 50 to 133dB(A), 60 to 133dB(C), 70 to 133dB(F)
– Level range: 20 to 80dB, 20 to 90dB, 20 to 100dB, 20 to 110dB, 30 to 120dB, 40 to 130dB (six ranges)
– Linearity range: 90dB
– Frequency weighting: A, C, FLAT
– Measurement items: Lp, LMH, Leq, LAe, Lmax, Lmin, Lx (L5, L10, L50, L90, L95), Peak
– Measurement time: 1s, 3s, 5s, 10s, 1min, 5min, 10min, 15min, 30min, 1h, 8h, 24h manual (max: 199h 59m 59s)
– Sampling interval: 20.8s (Leq), 10ms (Lmax, Lmin)
– Lx sampling interval: 100ms
– Display: LCD with backlight (12864 dots)
– Digital display: Four line, resolution 0.1dB (display update 1s)
– Bar display: Display update 0.1s
– Warning: Over range: +3dB from upper limited scale / Under range: -0.6dB from lower limited scale
– Battery display: Four level display of battery condition
– Inbuilt memory: Approximately 10, 000 samples: 1, 000 sets of results
– Inbuilt calendar: Year/month/day/ hour : minute : second
– Pause: Pause and a function that deletes preceding 3 or 5 sec. data
– Calibration signal: Internal generator (1 kHz sine wave)
– AC output: 1Vrms (FS), output impedance: 600, load impedance > 10k
– DC output: 2.5V (FS), 0.25V/10dB, output impedance: 50, load impedance > 10k
– RS232 interface: RS-232C (asynchronous) / Data bits 8 bits / Stop Bit 1 bit / Parity none / baud rate 4800, 9600, 19200 bps
– Power supply: Four 1.5V AA batteries or AC adaptor
– Battery life: 20 hours (without screen backlight)
– Operating temperature: -10 to 50 C
– Humidity: 30% to 90% (without condensation)
– Size: 85mm x 287mm x 46mm
– Weight: 370g