Castle / GA6224
GA6224 Industrial and Environmental Logging Sound Level Meter, Class 1
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 ideal for companies to run their own risk assessments.
Measuring noise really does not have to be complicated, even for the novice, and the GA6224 (Class 1) Integrating Sound Level Meters are 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.
Noise at Work Measurements
These noise meters 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.
Environmental Monitoring
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.
Multi-purpose Measurement
Many sound measuring tasks require the measurement of Leq (equivalent continuous level), Lmax (Maximum rms level), LE (Sound Exposure) or percentiles, and all of these can be completed using these meters with their accessories.
Operation
The Castle GA6224 (Class 1) Integrating Sound Level Meter has 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.
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
Technical Specification
Standards GA6224 : Conforms with IEC 61672-1:2002 Class 1, IEC 60651:1979 and IEC 60804:2000 Type 1 Microphone GA6224 : 7146N 1/2'' electret condenser microphone
| Measuring Ranges | 27 - 130dB(A), 38 - 130dB(C), 41 - 130dB(F) |
| Frequency Ranges | 20Hz - 20kHz |
| Time Weighting | FAST, SLOW, IMPULSE |
| Peak Range | 50 - 133dB(A), 60 - 133dB(C), 70 - 133dB(F) |
| Level Range | 20 - 80dB, 20 - 90dB, 20 - 100dB, 20 - 110dB, 30 - 120dB, 40 - 130dB |
| 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 | 20.8µs (Leq), 10ms (Lmax, Lmin) |
| Lx Sampling Interval | 100ms |
| Display | LCD with backlight (128×64 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 |
| Built-In Memory | Approximately 10, 000 samples: 1, 000 sets of results |
| Built-In 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: 600O, load impedance > 10kO |
| DC Output | 2.5V (FS), 0.25V/10dB, output impedance: 50O, load impedance > 10kO |
| 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 size-AA batteries or AC adapter |
| Battery Life | Alkaline batteries: 20 hours continuous operation. Use of LCD backlight will shorten battery life (approximately 1/3) |
| Operating Temperature | -10 to + 50 ° C |
| Humidity | 30% to 90% (without condensation) |
| Size | 85(W) × 287(H) × 46(D) mm |
| Weight | 370g (including batteries) |
US 18020 
GB 14662 
CA 11729 
AU 9461 
IE 7171 
NZ 2429 
BR 1096 
SG 976 
