| Brand |
Castle Group |
| Application |
Environmental Noise, Noise at Work |
| Class |
Class 2 |
| Weightings |
A, C |
| Measurement Parameters |
Leq, Dose, Lep’d (LEX) |
| Available Outside the UK? |
Yes |
Castle Sonus GA216I Class 2 Integrating Sound Level Meter
The Castle SONUS range of pocket sized sound level meters bring simplicity and power to the worlds of Noise at Work and Environmental sound monitoring. From a basic sound pressure meter to full data-logging, combined sound and dosemeter, the range of systems covers a wide diversity of applications.
The Castle SONUS GA216I is a feature packed instrument that is fully compliant with IEC 61672-1:2002 Class 2, IEC 60651: 1979 Type 2 and IEC 60804: 2001 Type 2. This meter gives simultaneous Leq (rms. average) and peak measurement for assessments to the Noise at Work Regulations 1989. It has a high-specification measurement microphone and is cased in tough, crack resistant ABS plastic.
Features
- Integrated equivalent level (Leq) measurement
- Personal Sound Exposure Level (LEpd)
- Sound Pressure (Lp) to 0.1 dB resolution
- 'A' and 'C' frequency weighting (toggle)
- 'Slow' and 'Fast' Time weighting (toggle)
- Simultaneous measurement of Lp, Lmax, and Cpeak
- Lmax - maximum Lp hold (rms.)
- Cpeak - maximum peak level
- Elapsed time (running time hrs, min, sec)
- Single Event Sound Exposure Level (LAE)
- Overload and Under-range indication
- Battery condition (Life approx. 12 hours)
Castle GA257B Industrial Pocket Dosemeter
The GA257B was designed to be powerful and easy to use. They are small and tough so measurements and data can be collected throughout the working period. Data can then be reviewed on screen or can be downloaded to a PC for further analysis. It is a dedicated basic dosemeter which is fully compliant with IEC 61252:1993 and gives simultaneous sound exposure (Lep’d) and maximum peak (Zpeak) measurements, an essential feature for Noise at Work Regulations assessments.
They have a clear display which allows data to be read on screen. You can lock the keypad in order to prevent any measurements being accidently stopped or altered. The data is stored on flash memory at user selected intervals. There is built in software which has been designed to suit future upgrading for feature enhancements, legislative changes or instrument upgrades.
Castle GA601 Single Level Class 2 Sound Meter Calibrator
The GA601 produces a calibration tone of 1000Hz at a level of 94dB re 20 µPa at the microphone and it is supplied with a ½" cavity. It provides accurate, stable and simple to use sound source for carrying out the acoustic calibration of a wide range of sound level meters. This Class 1 Acoustic Calibrator was designed to be rugged and long lasting and it has proved this. It produces two levels, 94dB and 104dB. The calibrator is switch operated, which engages the selected sound source for one minute, after which it automatically turns off.
Technical Specification
• Sound Pressure (Lp) to 0.1 dB resolution
• 'A' and 'C' frequency weighting (toggle)
• 'Slow' and 'Fast' Time weighting (toggle)
• Simultaneous measurement of Lp, Lmax, and
Cpeak
• Lmax - maximum Lp hold (rms.)
• Cpeak - maximum peak level
• Elapsed time (running time hrs, min, sec)
• Overload and Under-range indication
• Battery condition (Life approx. 12 hours)
Castle Sonus GA216I Class 2 Integrating Sound Level Meter
| Applicable Standards | IEC 61672-1:2002 (Integrating, Sound Exposure and Sound Level Meters)
IEC 60651:1979+A1+A2 (Sound Level Meters)
IEC 60804:2000 (Integrating Function |
| Microphone and Preamplifier | Type 7052 Pre-Polarised ½” (13.2 mm) Free-Field, Electret Condenser Microphone: 20Hz – 8KHz ± 2dB –32 dB ± 3 dB re 1V/Pa Custom pre-amplifier design Typical actuator to free-field correction factor (based on 500Hz=0) is as follows |
| Display | Back-lit LCD panel (8x1 Characters) Alpha-Numeric display for measured results |
| Level Range | Measuring Range: 35-140
Linear operating range (IEC61672-1): 65dB
3 Measurement Ranges (IEC61672-1): 35-100 55-120 - Reference Range 75-140 |
| Noise Floor | Typical ’A’ Weighting <32 dB(A) rms.
‘C’ Weighting <38 dB(C) rms |
| Frequency Weighting | ‘A’ and ’C’ to IEC 61672-1:2002 and IEC 60651:1979+A1+A2 |
| Frequency Range | 20 Hz - 8 kHz (including microphone) 1 Hz - 20 kHz (electrical characteristics) |
| Time Weighting | Slow and Fast |
| Instrument Response | Simultaneous rms. and Peak |
| Measurement Parameters | Lp (Sound Pressure Level), Leq (Equivalent Sound Level), Lmax (maximum Level), Cpeak (Max. Peak Level), LEpd (Sound Exposure Level), LAE (Single Event Sound Exposure Level) Other Displays: Elapsed time, Overload, Battery Life |
| Calibration | Software controlled 91.0 to 120.0 dB (1kHz) in 0.1 dB steps |
| Processing | A to D Converter: 12-bit, 352Hz sampling Controller: 8MHz, micro-controller |
| Power Requirements | Batteries: 1 x 6LR61 (size PP3), Life: >12 hours (alkaline batteries, continuous operation) |
| Dimensions | 60mm (width) x 35mm (depth excluding pocket clip) x 135mm (height without microphone) or 210mm (height with microphone) |
| Weight | 220gms (including battery) |
| Manuals | Multi-language manuals*: French, German, Spanish and Italian |
Castle GA257B Industrial Pocket Dosemeter
| Standards | IEC61672-1-2002 (Sound Level Meters)
IEC61252-1993 (Personal Sound Exposure Meters) |
| Linear Operating Range | 70dB |
| Detector Characteristics | RMS and Peak |
| Exchange Rate | 3dB
4dB
5 dB |
| Criterion Level | 75dB
80dB
85dB
90dB |
| Threshold Level | -5dB
-10dB
OFF |
| Peak | 3dB above top of selected range |
| Display | Custom alphanumeric LCD, digit size 7mm x 5mm |
| Memory | 4800 Data Intervals Maximum |
| Calibration | 91.0 to 120.0dB @ 1KHz |
| Batteries | 1 x PP3 (9V) Approximately 12 hours continuous use |
| Operating Temperature | -10 to + 50ºC |
| Humidity Effect | < 0.5dB from 25% to 90% RH |
| Vibration | No Effect on Instrument |
| Processing | A to D Converter: 12-bit, 325kHz sampling. 8MHz, micro-controller |
| Dimensions | 60mm (width) x 35mm (depth excluding pocket clip) x 135mm (height) |
| Microphone Cable Length | 800mm (including rubber sleeve and microphone) |
| Weight | 220g (including battery) |
EMC:
- Emissions: EC 61000-6-3, EN61326-1:2006, CISPR 22:1997 EN55022:1998, FCC Rules, Part 15 2003 Class B
- Immunity: IEC 61000-6-2:2005, EN61326-1:2005 Levels ±4kV (Contact), ±8kV (Air)
- Amp Mod: IEC 61000-6-2:2005, Level 10V/m
Castle GA601 Single Level Class 2 Sound Meter Calibrator
| Applicable Standards | IEC60942:2003 Sound Calibrators, Class 2/C |
| Output | 94dB relative to 20µPa
Nominal Sound Pressure level at 101.3kPa (760mm Hg) 23° & 50%RH |
| Tolerance | ± 0.3dB |
| Harmonic Distortion | < 3% |
| Temperature Range | -10°C to 50°C |
| Batteries | 2 x 3V CR2032 (coin cell)
Life: Approx. 70 Hours |
| Dimensions | Cavity Diameter: 1/2" microphone standard
Length: 140mm
Diameter: 51mm
Weight: 230g |
