Castle / NK002C
Class 1 Risk Assessment / Environmental System
GA6224 (Class 1) Industrial / Environmental Logging Sound Level Meter c/w Calibrator (Dual level, Class 1) (Includes GA690 Barometer) and Data management software and interface cable for use with GA6224
The in-depth combination risk assessment package for larger applications.
- Enhanced data analysis and manipulation
- Portable and simple to use
The meter is 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 meter 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. Castle GA6224 provides 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 meter 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.
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 18782 
GB 14269 
CA 11820 
AU 9488 
IE 6545 
NZ 2544 
BR 1328 
SG 928 
