Castle / GA257L
Sonus GA257L Data-Logging Dosemeter, Class 2
The SONUS Pocket Dosemeters are designed to be powerful and easy to use. These dosemeters are small and tough so measurements and data can be collected throughout the working period. Data can be reviewed on screen or downloaded to a PC for further analysis The SONUS GA257L which is also fully compliant with IEC 61252:1993 adds logging capabilities, allowing data to be downloaded to a PC using the Castle dBdataPro noise analysis software, and measures sound pressure levels and Leq
Parameters measured
Zpeak
% Dose
Lep'd (Lex)
% DOHR (Dose/Hour)
Pa2h (Lep'd expressed in Pascals)
Exposure Time
The GA257L dosemeter also features
Lp (SPL)
Leq
Cpeak
LE (SEL)
Real Time Clock
Technical Specification
| Standards | 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 | 2100 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
