CASTLE GA113 Operating Manual

Pocket sound level meter

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Operating Manual

Pocket Sound Level Meter

GA113

www.castlegroup.co.uk

Table of Contents

Summary of Contents for CASTLE GA113

Page 1 Operating Manual Pocket Sound Level Meter GA113 www.castlegroup.co.uk...
Page 2 Thank you for buying a Castle product, I am sure you will find both the goods and the service to be of the highest quality but if not, then please feel free to write to me personally and I will ensure that your needs are dealt with immediately.
Page 3 Copyright This manual is copyrighted with all rights reserved. Copying in part or in whole is prohibited without the prior written consent of Castle Group Ltd. Precautions • Only operate the instrument as described in this manual. • These are precision instruments, protect from shocks and vibrations.
Page 4: Table Of Contents
Contents Introduction....................1 Using the Manual..................1 Sample Keypad Layout................2 Operating Tips..................3 Battery Installation / Check............... 4 Microphone ....................4 Switching the Instrument On & Off..........5 Information Button................. 5 Pause / Play Button ................6 Display Button..................6 Menu Button.....................
Page 5: Introduction
Introduction Thank you for purchasing your product from Castle Group Ltd. The GA113 has been designed to surpass the requirements of the new international Class 1 sound level meter standard IEC 61672-1:2002. It may be used in industry or for general purpose measurement to ascertain noise levels accurately yet economically.
Page 6: Sample Keypad Layout
Sample Keypad Layout UP ARROW DOWN ARROW MENU CLEAR DISPLAY INFORMATION PAUSE/ PLAY POWER ON/ OFF Page 2...
Page 7: Operating Tips
Operating Tips This section is designed to enable you to get the best measurement results out of your instrument. • Always check the battery status of the instrument before use. • Always calibrate the instrument prior to carrying out any measurements.
Page 8: Battery Installation / Check
The microphone capsule fitted to your instrument is a high quality class 1 instrumentation grade 1/2 inch capsule. The GA113 can be fitted with an optional dosemeter microphone assembly (MK279DP1B) in order that it can be attached to the collar of a noise exposed worker.
Page 9: Switching The Instrument On & Off
Switching the Instrument On & Off Press and release the POWER button once and the instrument turns on. Allow the instrument to scroll through its start-up sequence before pressing any other button; this will take approximately 3 seconds. When the instrument has completed its start-up sequence the display will change to LP in PAUSED mode using the settings that were last selected.
Page 10: Pause / Play Button
(Pause / Play) Button Press button PAUSED All functions can be held so that they do not update by pressing the button. Once PAUSED the display may be read as normal, allowing the user to take note of any required readings. For normal operation of the instrument to continue press the / button once more and the instrument will briefly show PLAY before returning to the...
Page 11 The table below is a breakdown of the display parameters and is accompanied by a brief description of each one: - Display Description 93.7dBC Level Pressure (Lp) Leq 93.7 Displays the LEQ Lmx 97.3 Maximum Lp Pmx 98.8 Maximum Peak 00:01:33 Run time duration (Elapsed Time) Lex 87.1...
Page 12: Menu Button
The pressure to free-field correction value to be applied when used with a Castle calibrator GA601, GA607, and a B&K4231 is as follows: Castle GA607 Calibrator Pressure To Free Field Correction = -0.2...
Page 13: Shift Duration
Shift Duration It is possible to select an alternative shift duration in hours and minutes of an employee for calculating projected dose and projected Lex calculations. Press MENU repeatedly until SD < OK is displayed. Press OK once and the instrument will display the currently selected shift duration in hours.
Page 14: Criterion
Criterion Press MENU repeatedly until CRIT < OK is displayed. Press OK and the instrument will display the options available for CRITERION Setup. To change the CRITERION use either the arrow buttons. Pressing either of these two buttons allows you to scroll through the three available exchange choices, 80dB, 85dB, 90dB Note: The symbol indicates the current selection as you move around the...
Page 15: Clear Button
C (Clear) Button The C button is used to reset ALL data* (including overload indication). This feature should be used prior to taking new readings and after calibration. Press C CONFIRM? Press OK to reset the data or any other button to cancel the request. The instrument then returns to the previously displayed parameter.
Page 16: Technical Specifications
Technical Specification The individual characteristic applies to each instrument unless specifically worded otherwise. Instrument Standards: IEC 61672-1 : 2002 Class 1 Group X IEC 60651 : 1979 Type 1 + A1:1993 + A2:2000 Group X BS EN 60651 : 1994 Type 1 Group X IEC 60804 : 2000 Type 1 Group X BS EN 60804 : 2001 Type 1 Group X IEC 61252 : 1993...
Page 17 Primary Indicator Range IEC 60651:1979 (1kHz) 41.0 – 93.0 55.0 – 113.0 75.0 – 133.0 (Primary Indicator Range allows for a crest factor of 3 or approximately 7dB) Linearity Range & Pulse Range IEC 60804:2000 41.0 – 100.0 55.0 – 120.0 75.0 –...
Page 18 < 2 minutes Electrical Signal Input: Electrical signals can be applied to the Castle Pocket range of sound level meters by removing the acoustical microphone and replacing with a dummy microphone having a series capacitor of 18pF ±2%. The BNC termination is then used to interface with a suitable signal generator with an output impedance of 600W at 1kHz.
Page 19 -0.01 The pressure to free-field correction value to be applied when used with a Castle calibrator GA601/GA607 or B&K4231 is as follows: -0.2dB The capsule can be removed by unscrewing anti-clockwise although great care must be taken when doing this to avoid damage to either the capsule or the instrument.
Page 20 Calibration Reference Conditions: Sound Field Free Field Air Temperature 23°C (73°F) Relative Humidity Atmospheric Pressure 101.325 kPa Sound Pressure Level 94.0dB Reference Level Range 55 – 120dB Reference Frequency 1kHz The reference direction of incidence for all microphones is perpendicular to the front face (diaphragm surface) of the microphone.
Page 21 Overall Dimensions: 210mm x 60mm x 35mm (approx.) Overall Weight including Batteries: 220g Case Reflections: GA113 using the Aco 7146A microphone Stalk length 75mm from front of microphone grid to top of case body Frequency (Hz) Case Effect (dB) Frequency (Hz) Case Effect (dB) 31.5...
Page 22 Both AC and DC outputs require load impedance's to exceed 10kΩ, however load impedance's > 100KΩ are recommended. Front View DC Output AC Output Radio Frequency Fields: The GA113 instrument falls into classification X for the susceptibility to Radio Frequency Fields. Page 18...
Page 23: Ec Declaration Of Conformity
• Radio-frequency EM field amplitude mod: EN61000-4-3:1996 Level: 3V/m No differences in radio frequency emissions are apparent between the available ranges on GA113 instrument. We hereby declare that the instruments named above have been designed to comply with the relevant sections of the above referenced specifications, and that the above named instruments comply with all essential requirements of the specified Directives.
Page 24: Instrument Disposal
KA010 – Sml Attaché Case (Holds Instrument and Calibrator) 6LR61 – 9V Battery (Pack of 10) Instrument Details: For your records and for future correspondance with Castle Group Ltd regarding your instrument, please complete the following details: - Instrument Serial Number...
Page 25: Warranty And After Sales Service
In the event of a fault occurring, during the warranty period, the instrument should be returned to Castle Group Ltd, in its original packaging, or to an authorised agent. Please enclose a clear description of the fault or symptom.
Page 26: Trouble Shooting
This is a protective cover for the sensitive fitted microphone. You must remove it before microphone? using the instrument. The GA113 does not have a backup memory so all readings are lost when the Where have my results gone? instrument is switched off. Always take a note...
Page 27: Disclaimer
Castle Group Ltd assumes no responsibilty or liability for any injury, loss or damage incurred as a result of misinterpreted or inaccurate information. Any documentation supplied with your product is subject to change without notice.