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www.castlegroup.co.uk

Operating Manual

Pocket Sound Level Meter

GA113

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Summary of Contents for GA113

Page 1: ...www castlegroup co uk Operating Manual Pocket Sound Level Meter GA113...

Page 2: ...tics itself If you would like to become a competent person in the eyes of the law then you may like to know more about our Competent Persons training course for Noise at Work Reulations You can visit...

Page 3: ...htly moistened with water when necessary Do not allow any conductive objects such as wire or metal particles to enter the unit Do not try to disassemble the instrument or attempt any repairs as this w...

Page 4: ...Play Button 6 Display Button 6 Menu Button 8 Calibration 8 Shift Duration 9 Frequency Time Weighting 9 Exchange Rate 9 Criterion 10 Threshold 10 Keypad Lock 10 Clear Button 11 Changing Range 11 Techn...

Page 5: ...ents 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 Us...

Page 6: ...Page 2 Sample Keypad Layout POWER ON OFF PAUSE PLAY INFORMATION MENU OK UP ARROW CLEAR DISPLAY DOWN ARROW...

Page 7: ...fall nearest the middle of e g if the levels expected are around 85dB then select the 55 120 range When taking noise measurements hold the instrument as far in front of the body as is comfortable to m...

Page 8: ...one that is almost flat It is recommended that the battery should be replaced if only 1 bar is displayed The screen will flash BAT LOW when the battery level drops below a sustainable level whilst the...

Page 9: ...OLLECTED BEFORE TURNING OFF THE INSTRUMENT AS ALL DATA IS LOST WHEN THE INSTRUMENT IS TURNED OFF i Information Button A scrolling sequence exists with this button repeated pressing of the button will...

Page 10: ...ode Display Button A scrolling sequence exists with this button repeated pressing of the button will allow you to scroll through the various measurement screens available on your instrument Lp SPL Leq...

Page 11: ...lx 78 6 Displays the projected Lex Lep d assuming a shift length set in the Shift Duration LE 93 1 Sound Exposure Level SEL Do 67 Dose dependent on exchange and criterion Pr 0 Displays the projected D...

Page 12: ...the calibrator A certain amount of resistance should be felt whilst inserting the microphone as the o ring seal on the calibrator forms a seal around the microphone Ensure that the calibrator is swit...

Page 13: ...epeatedly until WTG OK is displayed Press OK and the instrument will display the options available for WTG SETUP To change WTG use either the or arrow buttons Pressing either of these two buttons allo...

Page 14: ...ent will display the currently selected threshold level relative to the selected Criterion level Repeated pressing of the or arrow buttons will alter this figure between 0 5 10 Note The symbol indicat...

Page 15: ...ameter Use caution when using the C button as reset data cannot be recovered Changing Range A range change can be performed by the use of the arrow buttons while in any of the DISPLAY modes instrument...

Page 16: ...rement Parameters Lp Leq Lmax Pmax LE Pa2 h Lex Projected Lex DOSE Projected DOSE Dose Per Hour Elapsed time Peak Frequency Weighting C weighting to IEC 61672 1 Class 1 Time Weightings SLOW and FAST a...

Page 17: ...Ranges dB for Peak Hold Display wrt 1kHz 63 0 103 0 83 0 123 0 103 0 143 0 Typical Electrical Self Generated Noise Level 32 dBA 38 dBC Total Measuring Range The difference between the lowest possible...

Page 18: ...ge 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 s...

Page 19: ...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 Re fitting is a reverse...

Page 20: ...gth of time Effect of Temperature Accuracy better than 0 5 dB over the range 0 to 40 C Effects of Humidity Less than 0 5 dB over the range 25 to 90 relative humidity provided there is no Condensation...

Page 21: ...length 75mm from front of microphone grid to top of case body Frequency Hz Case Effect dB Frequency Hz Case Effect dB 31 5 0 0 800 0 2 40 0 0 1000 0 0 50 0 0 1250 0 3 63 0 0 1600 0 2 80 0 0 2000 0 5 1...

Page 22: ...reading in dB x 0 04 Output affected by Frequency Weighting Measurement Range Output Socket Both AC and DC outputs require load impedance s to exceed 10k however load impedance s 100K are recommended...

Page 23: ...1 1997 A1 1998 with the following Tests Radiated Emissions EN55022 1995 Class B ESD EN61000 4 2 1995 Levels 4kV C 8kV A Radio frequency EM field amplitude mod EN61000 4 3 1996 Level 3V m No difference...

Page 24: ...collection systems in place within the EU for the disposal of your product To find the nearest UK waste recyling point in your area enter your postcode in the website www recycle more co uk For more i...

Page 25: ...horised agent All instruments are designed to meet rigid British and International Standards An annual calibration is recommended to ensure that these high standards are maintained This is particularl...

Page 26: ...s microphone properly inserted in the calibrator Is the calibrator switched on and working Has the instrument and or calibrator been knocked or moved as the calibration routine is taking place Has the...

Page 27: ...e figures are a lot higher than expected Did you clear the memory after calibration Disclaimer Whilst every effort is made to ensure the accuracy and reliability of both the instrument described and t...

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