PMASEL

Page 1 of 4
Certificate No.

Customer name：Contact information：
Product：
Type：

SOUND CALIBRATOR (Pistonphone)
NC-72B

Serial Number：
Manufacturer：
Test Calibration chart：
Test Barometer：Cal. Date：
Type： SBR-121
Serial Number：

Calibration location：

2-22-2, Hyoe, Hachioji, Tokyo 192-0918, JAPANRION SERVICE CENTER CO., LTD. Calibration room

Ambient condition：

Air Temperature： 20 ℃ ～ 26 ℃
Relative Humidity： 25 ％ ～ 70 ％Static Pressure： 97 kPa ～ 105 kPa

Procedure：・Notes

RION CO., LTD.

ASNITE Calibration Manual 〈Sound Calibrator〉

Calibration date：

The calibration result of the above-mentioned acoustic calibrator is the result of performing the test specified
in Annex B (Periodical test) of IEC 60942:2017 (JIS C 1515:2020) according to the document written based on
the accreditation of ISO/IEC 17025:2017.
Issue date：

Head of Office
Quality Control Office
Engineering Business Unit
RION SERVICE CENTER CO., LTD.
2-22-2, Hyoe, Hachioji, Tokyo 192-0918, JAPANThis certificate shows the results of calibration with a standard unit traceable to national standards.
The accreditation symbol is attestation of which the result of calibration is traceable to Primary Measurement
Standards (National Standards).
The certificate shall not be reproduced except in full, without the written approval of the issuing laboratory.
The calibration laboratory who issued this calibration certificate conforms to ISO/IEC 17025:2017.
This calibration certificate was issued by the calibration laboratory accredited by IAJapan who is a signatory
to the Mutual Recognition Arrangement (MRA) of International Laboratory Accreditation Cooperation (ILAC)
and Asia Pacific Accreditation Cooperation (APAC).
This (These) calibration result(s) may be accepted internationally through ILAC/APAC MRA.

PMASEL

Page 2 of 4
Certificate No.

Statements of conformity

Summary of calibration results
Test ItemJudgment
Class LS/M

Class 1/M

Sound pressure level

Pass

PassFrequency

Pass

Pass

Total distortion + Noise

Pass

Pass

As a result of calibration, the acoustic calibrator provided for the test showed compliance with therequirements of class LS/M and class 1/M specified in Annex B of IEC 60942:2017 (JIS C 1515:2020), which
specified periodic tests on sound pressure level, frequency and total distortion + noise in the environment atthe time of calibration.

・Notes

Acceptance decision rule for conformity
Judgment of conformity to IEC 60942:2017 (JIS C 1515:2020) Annex B is based on the judgment that themeasured deviations do not exceed the corresponding acceptance limits and the uncertainty ofmeasurement does not exceed the corresponding maximum-permitted uncertainty of measurement for acoverage probability of 95 %.

If a barometer is included as a test sample, test the barometer in advance. As for the inspection, if themeasurement value of the calibration person's standard barometer is within the range of the uncertainty ofmeasurement of the test barometer, it is judged as the inspection pass and the barometer is used for theperiodical test. At this time, the expanded uncertainty of the standard barometer
does not exceed 0.2 kPa.

PMASEL

Page 3 of 4
Certificate No.

Calibration Results・Test Environment
Air Temperature：

Relative Humidity：
Static Pressure：・Uncertainty of measurement
The uncertainty of measurement is based on the standard uncertainty multiplied by a converagefactor =2 providing a level of confidence of approximately 95 %・Calibration chart used for Calibration
Calibration Date

Specified sound pressure level

Specified frequency

113.96 dB

251.18 Hz

・Barometer used for Calibration and Static pressure at the time of the test
ClassType

Serial Number

Static Pressure

Notes

LS/M

SBR-121

Owning of customer

1/M

SBR-121

Owning of customer

Specified sound pressure level： 113.96 dB・Sound pressure level
Class

MeasuredValue*1

Acceptancelimit of result

Result *2

Uncertainty ofmeasurement

Maximum
permitted
uncertainty

Judgment

LS/M

114.00 dB

0.04 dB

0.10 dB

0.08 dB

0.10 dB

Pass

1/M

114.00 dB

0.04 dB0.25 dB

0.08 dB

0.15 dB

Pass

Uncertainty ofmeasurement

Maximum
permitted
uncertainty

Judgment

・Calibration method is by Standard Microphone.

・Frequency
ClassSpecified frequency： 251.18 Hz
MeasuredValue

Result *3

Acceptancelimit of result

LS/M

251.2 Hz

0.0 %

0.7 %

0.2 %

0.2 %

Pass

1/M

251.2 Hz

0.0 %

0.7 %

0.2 %

0.2 %

Pass

・Calibration method is by Digital Multimeter.

・Total distortion + NoiseClassResult(Measured Value)

Acceptance limit ofresult

Uncertainty ofmeasurement

Maximum
permitted
uncertainty

Judgment

LS/M

1.7 %2.0 %

0.4 %

0.5 %

Pass

1/M

1.7 %

2.5 %

0.4 %

0.5 %

Pass・Calibration method is by Distortion Analyzer.
*1 Converted value at reference static pressure 101.325 kPa.
*2 The Result is the absolute value of the deviation of the Specified sound pressure level and the Measured Value.
*3 The Result is the absolute value of the deviation of the Specified frequency and the Measured Value convertedto a percentage.

PM

AS

EL

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Certificate No.

Statements of Metrological Traceability

This certificate shows the results of calibration with our working standards traceable to national standards
or public calibration agencies of foreign countries affiliated with the International Measurement andMeasurement Commission.
Some working standards are traceable through national reference or public calibration institutes offoreign countries affiliated with the National Metrology Commission through our reference standards.

End of certificate.