Castle Calibration
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Noise Meter & Sound Meter Calibration and Servicing

Castle Calibration provide professional sound meter calibration services, giving you fantastic and unrivalled value for your money.

Our calibration engineers in our laboratory are greatly experienced in servicing and calibrating almost all types acoustic measuring equipment, including sound meters, noise meters, dosimeters and multi-purpose equipment.

As a minimum, all instruments returned receive our standard service and calibration which includes basic upkeep and minor repairs, along with testing of the available Frequency Weightings (a minimum of 10 points per each weighting), plus Linearity (scaling and ranging) tests, and Time Weighting tests (based on the appropriate BSEN or IEC standard, and/or any other technical information available from the original equipment manufacturer). We also provide an indication of the meter's response to its associated acoustic calibrator (with microphone cavity correction, where available).
Select the "Find out exactly what we do for your equipment" button below to find out more.

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Our calibration laboratory abides by our stringent ISO 9001 quality system, ensuring we provide you with a high quality service every single time.

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Brands

SKU Brand Name Price Add
BZ7124/5/6 Brüel & Kjær Class 1 Mediator BZ7124/5/6 Sound Level Meter £250.00
SV102A_LIC_3 Svantek 1/1 & 1/3 octave analysis option (single and dual channel instrument version) statistics in 1/3 octaves £495.00
SV102_LIC_3 Svantek 1/1 & 1/3 octave analysis option (single and dual channel instrument versions) statistics in 1/3 octaves £470.00
Mediator 2238 B Brüel & Kjær Class 1 Mediator BZ7125/6 Sound Level Meter £250.00
Mediator 2238 D Brüel & Kjær Class 1 Mediator BZ7123/6 Sound Level Meter £495.00
Mediator 2238 E Brüel & Kjær Class 1 Mediator BZ7123/4/5/6 Sound Level Meter £495.00
GA116B Castle Group Digital Sound Pressure Level Meter Class 1 £155.00
GA116E Castle Group Dedicated Environmental Data-logging Sound Meter £250.00
CEL620A1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL620A2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL620B1 Casella Type 1 / Class 1 Integrating Sound Level Meter with Octave Band Filters £405.00
CEL620B2 Casella Type 2 / Class 2 Integrating Sound Level Meter with Octave Band Filters £380.00
CEL620C1 Casella Type 1 / Class 1 Integrating Sound Level Meter with 1/3 Octave Band Filters £495.00
CEL620C2 Casella Type 2 / Class 2 Integrating Sound Level Meter with 1/3 Octave Band Filters £470.00
CEL621A1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL621A2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL621B1 Casella Type 1 / Class 1 Integrating Sound Level Meter with Octaves £405.00
CEL621B2 Casella Type 2 / Class 2 Integrating Sound Level Meter with Octaves £380.00
CEL621C1 Casella Type 1 / Class 1 Integrating Sound Level Meter with 1/3 Octaves £495.00
CEL621C2 Casella Type 2 / Class 2 Integrating Sound Level Meter with 1/3 Octaves £470.00
CEL630A1 Casella Type 1 / Class 1 Advanced Integrating Sound Level Meter £250.00
CEL630A2 Casella Type 2 / Class 2 Advanced Integrating Sound Level Meter £225.00
CEL630B1 Casella Type 1 / Class 1 Advanced Integrating Sound Level Meter with Octaves £405.00
CEL630B2 Casella Type 2 / Class 2 Advanced Integrating Sound Level Meter with Octaves £380.00
CEL630C1 Casella Type 1 / Class 1 Advanced Integrating Sound Level Meter with 1/3 Octaves £495.00
CEL630C2 Casella Type 2 / Class 2 Advanced Integrating Sound Level Meter with 1/3 Octaves £470.00
CEL240 Casella Type 2 / Class 2 Sound Level Meter £130.00
CEL242 Casella Data Logging Type 2 / Class 2 Sound Level Meter £130.00
CEL244 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL246 Casella Data Logging Type 2 / Class 2 Integrating Sound Level Meter £225.00
GA116I Castle Group Integrating Sound/Lepd meter £250.00
GA116L Castle Group Safety/Environmental Data-logging Sound Meter £250.00
GA216B Castle Group Digital Sound Pressure Level Meter £130.00
GA216I Castle Group Pocket Integrating SLM £225.00
GA216L Castle Group Safety/Environmental Data-logging Sound Meter £225.00
GA6224 Castle Group Industrial/ Environmental Logging SLM £250.00
CR151A Cirrus Optimus Yellow Class 1 Sound Level Meter £155.00
CR151B Cirrus Optimus Yellow Class 1 Sound Level Meter with Data Logging £155.00
CR152A Cirrus Optimus Yellow Class 2 Sound Level Meter £130.00
CR152B Cirrus Optimus Yellow Class 2 Sound Level Meter with Data Logging £130.00
CR161A Cirrus Optimus Red Class 1 Integrating Sound Level Meter £250.00
CR161B Cirrus Optimus Red Class 1 Integrating Sound Level Meter with Data Logging £250.00
CR161C Cirrus Optimus Red Class 1 Int. Sound Level Meter with Logging and Octaves £405.00
CR162A Cirrus Class 2 Integrating Sound Level Meter £225.00
CR162B Cirrus Optimus Red Class 2 Integrating Sound Level Meter with Data Logging £225.00
CR162C Cirrus Optimus Red Class 2 Int. Sound Level Meter with Logging and Octaves £380.00
CR171A Cirrus Optimus Green Class 1 Int. Sound Level Meter with Logging & Octaves £405.00
CR171B Cirrus Optimus Green Class 1 Int. Sound Level Meter with Logging & 1/3 Octaves £495.00
CR172A Cirrus Optimus Green Class 2 Int. Sound Level Meter with Logging & Octaves £380.00
CR172B Cirrus Optimus Green Class 2 Int. Sound Level Meter with Logging & 1/3 Octaves £470.00
P33-1 Pulsar Type 1 Sound Meter with Real Time 1/1 and 1/3 Octave Band Filters £495.00
P33-2 Pulsar Type 2 Real Time Analyzer with 1/1 and 1/3 Octave Band Filters £470.00
P81A Pulsar Class 1 Integrating Sound Level Meter £250.00
P81A-SU80 Pulsar Class 1 Integrating Sound Level Meter with Datalogging £250.00
P81CA Pulsar Class 1 Integrating Sound Level Meter with A&C Weighting £250.00
P81CA-SU80 Pulsar Class 1 Integrating Sound Level Meter with A&C Weighting with Datalogging £250.00
P82A Pulsar Class 2 Integrating Sound Level Meter £225.00
P82A-SU80 Pulsar Class 2 Integrating Sound Level Meter with Datalogging £225.00
P82CA Pulsar Class 2 Integrating Sound Level Meter with A&C Weighting £225.00
P82CA-SU80 Pulsar Class 2 Integrating Sound Level Meter with A&C Weighting with Datalogging £225.00
P83 Pulsar Class 1 Integrating Sound Level Meter with Octave Filters £405.00
P84 Pulsar Class 2 Integrating Sound Level Meter with Octave Filters £380.00
P91 Pulsar Class 1 Logging Sound Level Meter £250.00
P92 Pulsar Class 2 Logging Sound Level Meter £225.00
P93 Pulsar Class 1 Logging Sound Level Meter with Octaves £405.00
P94 Pulsar Class 2 Logging Sound Level Meter with Octaves £380.00
P95 Pulsar Class 1 Logging Sound Level Meter with Octaves & 1/3 Octaves £495.00
P96 Pulsar Class 2 Logging Sound Level Meter with Octaves & 1/3 Octaves £470.00
PULSAR30 Pulsar Type 1 Sound Level Meter with Real Time Octave Band Filters £405.00
PULSAR30-2 Pulsar Type 2 Sound Level Meter with Real Time Octave Band Filters £380.00
SVAN 957_2 Svantek Type 1 Sound & Vibration Analyser including 1/1 and 1/3 octave filters £495.00
SVAN953 Svantek Type 2 SVAN953 Sound Level Meter £225.00
SVAN953_1 Svantek SVAN 953 including Logger and 1/1 octave £380.00
SVAN953_2 Svantek SVAN 953 including Logger & USB Host and SV 953_1 1/1 & 1/3 octave analysis £470.00
SVAN955 Svantek Type 1 Sound Level Meter £250.00
SVAN955_1 Svantek SVAN 955 including Logger £250.00
SVAN957 Svantek Type 1 Sound & Vibration Analyser including 1/1 octave filters £405.00
SVAN958 Svantek SVAN 958 including 1/1 & 1/3 octave analysis £495.00
SVAN959 Svantek Type 1 Sound & Vibration Analyzer including 1/1 & 1/3 octave filters £495.00
SVAN979 Svantek Type 1 Sound & Vibration Analyzer including 1/1 & 1/3 octave filters £495.00
SV102A_LIC_1 Svantek 1/1 octave analysis option (single and dual channel instrument versions) £405.00
SV102A_LIC_2 Svantek 1/3 octave analysis option (single and dual channel instrument version) statistics in 1/3 octave bands £405.00
SV102_LIC_2 Svantek 1/3 octave analysis option (single and dual channel instrument versions) statistics in 1/3 octave babds £380.00
GA202 Castle Group Analogue Sound Level Meter - Type 2 £130.00
GA204 Castle Group Analogue Sound LeVel Meter - Type 2 £130.00
GA206 Castle Group Analogue Sound Level Meter - Type 2 £130.00
GA208 Castle Group Digital Sound Level Meter - Type 2 £130.00
GA213 Castle Group Digital Sound Level Meter - Type 2 £130.00
GA102 Castle Group Analogue Sound Level Meter - Type 1 £155.00
GA104 Castle Group Analogue Sound Level Meter - Type 1 £155.00
GA109 Castle Group Analogue Sound Level Meter - Type 1 £155.00
GA210 Castle Group Integrating Sound Meter - Type 2 £225.00
GA214 Castle Group Integrating Sound Meter - Type 2 £225.00
GA215 Castle Group Integrating Sound Meter - Type 2 £225.00
GA6226 Castle Group Industrial/ Environmental Logging SLM (includes carry case) £225.00
GA207 Castle Group Sound Meter with Sequential Octaves - Type 2 £225.00
GA110 Castle Group LEQ Sound Meter / Dosemeter £250.00
GA111 Castle Group Logging LEQ Sound Meter / Dosemeter £250.00
GA113 Castle Group Integrating Sound / Dose Meter £250.00
GA117 Castle Group MIRUS Integrating Logging Sound Meter £250.00
GA120 Castle Group Logging Integrating SLM - Type 1 £250.00
GA122 Castle Group Ind/Env Logging Integrating SLM - Type 1 £250.00
GA107 Castle Group Sound Meter with Sequential Octaves - Type 1 £250.00
GA112 Castle Group Sound Meter with Sequential Octaves - Type 1 £250.00
GA231I Castle Group Pro-DX Vocis Industrial Class 2 (1/1 Octave) £380.00
GA221 Castle Group Logging Integrating Octave SLM - Type 2 £380.00
GA121 Castle Group Logging Integrating Octave SLM - Type 1 £405.00
GA123 Castle Group Ind/ Env Logging Integrating Octave SLM - Type 1 £405.00
GA131B Castle Group Pro-DX Vocis Logging Class 1 (1/1 Octave) £405.00
GA131I Castle Group Pro-DX Vocis Industrial Class 1 (1/1 Octave) £405.00
GA131C Castle Group Pro-DX Vocis Ind/Env Class 1 (1/1 Octave) £405.00
CEL350K10 Casella Noise Kit with 10 dBadge Dosimeters £225.00
CEL350K2 Casella Noise Kit with 2 dBadge Dosimeters £225.00
CEL350K3 Casella Noise Kit with 3 dBadge Dosimeters £225.00
CEL350K5 Casella Noise Kit with 5 dBadge Dosimeters £225.00
CEL-430/2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL-440.A2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL-450.A2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL-480.A2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL-490.A2 Casella Type 2 / Class 2 Integrating Sound Level Meter £225.00
CEL-430/1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL-440.A1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL-450.A1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL-480.A1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL-490.A1 Casella Type 1 / Class 1 Integrating Sound Level Meter £250.00
CEL-440.B2 Casella Type 2 / Class 2 Integrating Sound Level Meter with Octave Band Filters £380.00
CEL-450.B2 Casella Type 2 / Class 2 Integrating Sound Level Meter with Octave Band Filters £380.00
CEL-480.B2 Casella Type 2 / Class 2 Integrating Sound Level Meter with Octave Band Filters £380.00
CEL-490.B2 Casella Type 2 / Class 2 Integrating Sound Level Meter with Octave Band Filters £380.00
CEL-440.B1 Casella Type 1 / Class 1 Integrating Sound Level Meter with Octave Band Filters £405.00
CEL-450.B1 Casella Type 1 / Class 1 Integrating Sound Level Meter with Octave Band Filters £405.00
CEL-480.B1 Casella Type 1 / Class 1 Integrating Sound Level Meter with Octave Band Filters £405.00
CEL-490.B1 Casella Type 1 / Class 1 Integrating Sound Level Meter with Octave Band Filters £405.00
CEL-440.C2 Casella Type 2 / Class 2 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £470.00
CEL-450.C2 Casella Type 2 / Class 2 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £470.00
CEL-480.C2 Casella Type 2 / Class 2 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £470.00
CEL-490.C2 Casella Type 2 / Class 2 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £470.00
CEL-440.C1 Casella Type 1 / Class 1 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £495.00
CEL-450.C1 Casella Type 1 / Class 1 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £495.00
CEL-480.C1 Casella Type 1 / Class 1 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £495.00
CEL-490.C1 Casella Type 1 / Class 1 Integrating Sound Level Meter with 1/1 & 1/3 Octave Band Filters £495.00
GA117-1 Castle Group MIRUS Integrating Logging Sound Meter (1/1 Octave) £405.00
GA117-3 Castle Group MIRUS Integrating Logging Sound Meter (1/1 & 1/3 Octave) £495.00
Mediator 2238 - A Brüel & Kjær Class 1 Mediator BZ7126 Sound Level Meter £155.00
Mediator 2238 - F Brüel & Kjær Class 1 Mediator BZ7124/6 Sound Level Meter £155.00
Mediator 2238 - B Brüel & Kjær Class 1 Mediator BZ7125/6 Sound Level Meter £250.00
Mediator 2238 - D Brüel & Kjær Class 1 Mediator BZ7123/6 Sound Level Meter £495.00
Mediator 2238 - E Brüel & Kjær Class 1 Mediator BZ7123/4/5/6 Sound Level Meter £495.00
Mediator 2238 - G Brüel & Kjær Class 1 Mediator BZ7123/5/6 Sound Level Meter £495.00
Mediator 2238 - H Brüel & Kjær Class 1 Mediator BZ7123/4/6 Sound Level Meter £495.00
GA241B Castle Group dBAir Basic Class 2 £225.00
GA241S Castle Group dBAir Safety Class 2 £225.00
GA241SE Castle Group dBAir Safety & Environment Class 2 £225.00
GA241C Castle Group dBAir Construction Class 2 £225.00
GA141B Castle Group dBAir Basic Class 1 £250.00
GA141S Castle Group dBAir Safety Class 1 £250.00
GA141E Castle Group dBAir Environment Class 1 £250.00
GA141SE Castle Group dBAir Safety & Environment Class 1 £250.00
GA141C Castle Group dBAir Construction Class 1 £250.00
GA241SO Castle Group dBAir Safety Octave (1/1) Class 2 £380.00
GA141SO Castle Group dBAir Safety Octave (1/1) Class 1 £405.00
GA241SEO Castle Group dBAir Safety & Environment Octave (1/1 & 1/3) Class 2 £470.00
GA241CO Castle Group dBAir Construction Octave (1/1 & 1/3) Class 2 £470.00
GA131M Castle Group Pro-DX Vocis Multi-Function Class 1 (1/1 & 1/3 Octave) £495.00
GA141EO Castle Group dBAir Environmental Octave (1/1 & 1/3) Class 1 £495.00
GA141SEO Castle Group dBAir Safety & Environment Octave (1/1 & 1/3) Class 1 £495.00
GA141CO Castle Group dBAir Construction Octave (1/1 & 1/3) Class 1 £495.00
CK110/2 Cirrus Noise Dosimeter Kit with 2 doseBadges £130.00
CK110/5 Cirrus Noise Dosimeter Kit with 5 doseBadges £130.00
CK110/10 Cirrus Noise Dosimeter Kit with 10 doseBadges £130.00
Model 22-2 Pulsar Noise Dosimeter Kit with 2 doseBadges £225.00
Model 22-5 Pulsar Noise Dosimeter Kit with 5 doseBadges £225.00
Model 22-10 Pulsar Noise Dosimeter Kit with 10 doseBadges £225.00
SV102_LIC_1 Svantek 1/1 octave analysis option (single and dual channel instrument versions) £380.00
GA242S Castle Group SONIK Safety Data-logging Sound Meter, Class 2 £225.00
GA242SE Castle Group SONIK-SE Safety and Environmental Data-logging Sound Meter, Class 2 £225.00
GA142S Castle Group SONIK Safety Data-logging Sound Meter, Class 1 £250.00
GA142E Castle Group SONIK-E Dedicated Environmental Data-logging Sound Meter, Class 1 £250.00
GA142SE Castle Group SONIK-SE Safety and Environmental Data-logging Sound Meter, Class 1 £250.00
GA131E Castle Group Pro-DX Vocis Env Class 1 Leq £250.00
CEL120/1 Casella Class 1 Acoustic Calibrator £90.00
CEL120/2 Casella Class 2 Acoustic Calibrator £90.00
CR514 Cirrus Class 2 Acoustic Calibrator £90.00
CR515 Cirrus Class 1 Acoustic Calibrator £90.00
GA601 Castle Group Calibrator - Single Level - Class 2 £90.00
GA607 Castle Group Calibrator - Dual Level - Class 1 £90.00
Model 105 Pulsar Class 1 Acoustic Calibrator £90.00
Model 106 Pulsar Class 2 Acoustic Calibrator £90.00
Type 4231 Brüel & Kjær Class 1 Sound Calibrator £90.00
GA602 Castle Group Calibrator - Dual Level £90.00
CEL-110/1 Casella Class 1 Acoustic Calibrator - Dual Level £90.00
CEL-110/2 Casella Class 2 Acoustic Calibrator - Single Level £90.00
CEL-282 Casella Class 2 Acoustic Calibrator - Single Level £90.00
CEL-284/2 Casella Class 1 Acoustic Calibrator - Single Level £90.00
CEL350K1 Casella dBadge Dosimeter £225.00
CK110/1 Cirrus doseBadge £225.00
GA257B Castle Group Industrial Dosemeter £225.00
GA257L Castle Group Data-logging Dosemeter £225.00
Model 22-1 Cirrus doseBadge £225.00
SV102 Svantek Single Channel Dosimeter £225.00
SV102A Svantek Type 1 Single Channel Dosimeter £250.00
Type 4444 Brüel & Kjær Noise Dosemeter £225.00
Type 4445 Brüel & Kjær Logging Noise Dosemeter £225.00
Type 4445E Brüel & Kjær IS Logging Noise Dosemeter £225.00
Type 4448-A-001 Brüel & Kjær Cable Free Noise Dosemeter £225.00
Type 4448-A-002 Brüel & Kjær IS Cable Free Noise Dosemeter £225.00
Type 4448-B-001 Brüel & Kjær Cable Free Noise Dosemeter with HML £225.00
Type 4448-B-002 Brüel & Kjær IS Cable Free Noise Dosemeter with HML £225.00
GA254 Castle Group Dosemeter £130.00
GA255 Castle Group Personal Sound Exposure Meter £130.00
GA256 Castle Group Pesonal Sound Exposure Meter £130.00
GA154 Castle Group Logging Dosemeter £155.00
GA156 Castle Group Logging Personal Sound Exposure Meter £155.00
SV104 Svantek Compact Multi-feature Logging Noise Dosimeter £225.00
GA902 Castle Group Noise Activated Warning Sign £130.00
GA904 Castle Group Entertainment Noise Controller £130.00
Band Name Price
S1 Acoustic Calibrators £90.00
S2 Class 2 Meters, Dosemeters, Noise Activated Warning Units, & Entertainment Noise Controllers £130.00
S3 Class 1 Meters, Basic Data-Logging Dosemeters £155.00
S4 Class 2 Meters with Leq, Data-logging Dosemeters, & Type 2 Analogue SLM + 1/1 Octaves £225.00
S5 Class 1 Meter with Leq, & Type 1 Analogue SLM + 1/1 Octaves £250.00
S6 Class 2 Meters with Leq, 1/1 OR 1/3 Octave £380.00
S7 Class 1 Meters with Leq, 1/1 OR 1/3 Octave £405.00
S8 Class 2 Meters with Leq, 1/1 and 1/3 Octaves £470.00
S9 Class 1 Meters with Leq, 1/1 and 1/3 Octaves £495.00
S10 Performance Verification - GA824, GA902A, GA907 (dB Alert) £45.00
S11 Microphone Calibration (sensitivity at 1kHz) £99.00
S12 Microphone Calibration (Frequency response and sensitivity) £125.00

TRACEABLE CALIBRATION FOR SOUND METERS

Sound meters and their calibrators need regular calibration for many applications including:

  • Compliance with The Control of Noise at Work Regulations 2005
  • Environmental noise measurements to British or International Standards
  • Fire Alarm Testing to BS5839
  • Environmental Health applications
  • Sound Power Measurements
  • Product Quality Measurements
  • Product safety testing
  • Any testing to international Standards
  • Measurement used for the compliance of regulations
  • Other 'sensitive' applications requiring integrity of results

The United Kingdom Accreditation Service (UKAS) has issued a guide (LAB23) on calibration of Sound Meters and Calibrators in which it states recommended calibration intervals for various types of equipment, some of which is listed here:

  • Personal Dosemeters - 1 year
  • Microphones (Reference and Working) - 2 years
  • Sound Meters (tested to BS7580, where applicable) - 2 years
  • Sound Meters built to IEC 61672:Part 1 - 2 years
  • Sound Analyser for Building Acoustics Work - 2 years
  • All other Sound Meters - 1 year
  • Acoustic Calibrators (Mechanical or Electronic) - 1 year

Calibrating: Standard (Non-Integrating) Sound Level Meters

All instruments returned receive our standard service and calibration which includes basic upkeep and minor repairs, along with testing of the available Frequency Weightings (a minimum of 10 points per each weighting), plus Linearity (scaling and ranging) tests, and Time Weighting tests (based on the appropriate BSEN or IEC standard, and/or any other technical information available from the original equipment manufacturer). Castle Group also provides an indication of the meters response to its associated acoustic calibrator (with microphone cavity correction, where available).

For a GA116B Class 1 Sound Level Meter, for example, this would give a 32-point certificate detailing the response of the A and C Frequency Weightings, Fast and Slow Time Weightings, Range and scaling data, and response to an associated GA607 Class 1 Acoustic Calibrator (if returned with the meter).

Calibrating: Integrating (Leq) Sound Level Meters

All instruments returned receive our standard service and calibration which includes basic upkeep and minor repairs, along with testing of the available Frequency Weightings (a minimum of 10 points per each weighting), plus expanded Linearity (scaling and ranging) tests, and Time Weighting and Tone Burst tests for Leq response (based on the appropriate BSEN or IEC standards, and/or any other technical information available from the original equipment manufacturer). Castle Group also provides an indication of the meters response to its associated acoustic calibrator (with microphone cavity correction, where available).

For a GA117 Class 1 Integrating Sound Level Meter, for example, this would give a 122-point certificate detailing the response of the A, C, and Z Frequency Weightings, Fast and Slow Time Weightings, Expanded ranging and scaling data, Leq Tone Burst Response, and response to an associated GA607 Class 1 Acoustic Calibrator (if returned with the meter).

Calibrating: Integrating (Leq) Sound Level Meters with 1/1 or 1/3 Octave Bands

All instruments returned receive our standard service and calibration which includes basic upkeep and minor repairs, along with testing of the available Frequency Weightings (a minimum of 10 points per each weighting), additional microphone response data (where applicable), expanded Linearity (scaling and ranging) tests, Time Weighting and Tone Burst tests for Leq response (based on the appropriate BSEN or IEC standards, and/or any other technical information available from the original equipment manufacturer), and tests of the Single (1/1) or Third (1/3) Octave Band Filter responses demonstrating the frequency band attenuation response and insertion loss. Castle Group also provides an indication of the meters response to its associated acoustic calibrator (with microphone cavity correction, where available).

For a GA117 Class 1 Leq Sound Level Meter with 1/1 Octaves, for example, this would give a 187-point certificate detailing the response of the A, C, and Z Frequency Weightings, Fast and Slow Time Weightings, Expanded ranging and scaling data, Leq Tone Burst Response, response of the Octave Band frequency filters, plus the meters response to the associated GA607 Class 1 Acoustic Calibrator (if returned with the meter).

Calibrating: Integrating (Leq) Sound Level Meters with 1/1 and 1/3 Octave Bands

All instruments returned receive our standard service and calibration which includes basic upkeep and minor repairs, along with testing of the available Frequency Weightings (a minimum of 10 points per each weighting), additional microphone response data (where applicable), expanded Linearity (scaling and ranging) tests, Time Weighting and Tone Burst tests for Leq response (based on the appropriate BSEN or IEC standards, and/or any other technical information available from the original equipment manufacturer), and tests of both the Single (1/1) and Third (1/3) Octave Band Filter responses demonstrating the frequency band attenuation response and insertion loss. Castle Group also provides an indication of the meters response to its associated acoustic calibrator (with microphone cavity correction, where available).

For a GA117 Class 1 Leq Sound Level Meter with 1/1 & 1/3 Octaves, for example, this would give a 250-point certificate detailing the response of the A, C, and Z Frequency Weightings, Fast and Slow Time Weightings, Expanded ranging and scaling data, Leq Tone Burst Response, response of the Single- and Third-Octave Band frequency filters, plus the meters response to the associated GA607 Class 1 Acoustic Calibrator (if returned with the meter).

Or call and speak to one of our service and calibration engineers who will be happy to help 01723 584250

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