JJG 880-2006 PDF English
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| JJG 880-2006 | English | 150 |
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Verification Regulation of Turbidimeters
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| JJG 880-1994 | English | 479 |
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Verification Regulation of Turbidimeter
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JJG 880-2006: Verification Regulation of Turbidimeters---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/JJG880-2006
JJF
National Metrology Technical Specifications
of the People's Republic of China
Turbidimeters
浊度计
Issued on. SEPTEMBER 06, 2006
Implemented on. MARCH 06, 2007
Issued by. State Administration for Quality Supervision and Inspection
and Quarantine
Verification Regulation of
Turbidimeters
Replacing JJG 880-1994
This regulation was approved by General Administration of Quality Supervision,
Inspection and Quarantine on September 6, 2006, and shall be implemented from March
6, 2007.
Jurisdictional organization.
National Technical Committee on Environmental Stoichiometry
Drafting organizations.
National Institute of Metrology, China
Shanghai Institute of Measurement and Testing Technology
Beijing Institute of Measurement and Testing Technology
This regulation is entrusted to and shall be responsibly interpreted by National
Technical Committee on Environmental Stoichiometry.
Main drafters of this regulation.
Zhang Wenge (National Institute of Metrology, China)
Participating drafters.
Qiu Yanhui (Beijing Institute of Measurement and Testing Technology)
Gu Jiayu (Beijing Institute of Measurement and Testing Technology)
Qi Xin (National Institute of Metrology, China)
Liu Junjie (National Institute of Metrology, China)
Table of Contents
1 Scope... 5
2 References... 5
3 Terms and unit of measurement... 5
4 Overview... 6
5 Requirements for metrological performance... 6
5.1 Instrument’s zero-drift... 6
5.2 Instrument’s indication stability... 6
5.3 Instrument’s repeatability... 6
5.4 Instrument’s indication error... 6
6 General technical requirements... 6
6.1 Appearance... 7
6.2 Insulation resistance... 7
7 Measuring instrument control... 7
7.1 Verification conditions... 7
7.2 Verification items... 8
7.3 Verification method... 8
8 Verification results handling... 10
9 Verification cycle... 10
Annex A Preparation of Zero Turbidity Water... 11
Annex B Calibration of Turbidity Standard Piece... 12
Annex C Format of Verification Record... 13
Annex D Format of Inner Pages of Verification Certificate... 15
Annex E Format of inner pages of verification results notification... 16
Verification Regulation of Turbidimeters
1 Scope
This regulation applies to initial verification, subsequent verification and in-use verification
of desktop and portable typhotoelectric turbidimeters for laboratory and field service that
are displayed through Formazine turbidity unit and the display results can be converted
into Formazine turbidity unit.
2 References
The following references apply to this regulation.
JJF 1001-1998 General Terms in Metrology and Their definitions
JJG 1015-2002 General Norm for Pattern Evaluation and Pattern Approval of
Measuring Instruments
ISO 7027.1999 Water quality- Determination of turbidity.
3 Terms and unit of measurement
Formazine -- Chinese translated name of Formazine;
This regulation adopts Formazine turbidity standard specified in International Standard
ISO7027 and issued by International Standard Organization, and adopts the “Unit” used in
this standard as turbidity measurement unit. According to different measurement modes,
there are mainly following turbidity units determined based on measurement standard of
Formazine standard solution.
4 Overview
Turbidimeter (hereinafter referred to as the instrument) is an instrument used to measure
the degree of scattering or attenuation of light generated by insoluble particulate matters
suspended in transparent liquid, and make quantitative characterization of content of
these suspended particulate matters.
5 Requirements for metrological performance
5.1 Instrument’s zero-drift
Instrument’s zero-drift shall not exceed ±1.5% of full scale value, within the measuring
range in 30 min.
5.3 Instrument’s repeatability
When measuring the same sample repeatedly, relative standard deviation of measured
value shall not be greater than 2%.
5.4 Instrument’s indication error
Relative indication error of instrument shall not be greater than ±10%.
6 General technical requirements
6.1 Appearance
6.2 Insulation resistance
Insulation resistance between power supply terminal and metal piece of instrument shell
shall not be less than 20 MΩ.
7 Measuring instrument control
Measuring instrument control includes initial verification, subsequent verification and
in-use verification.
7.1 Verification conditions
7.1.1 Environmental conditions.
Environmental conditions. 15°C〜30°C ;
Relative humidity. ≤80 % RH;
Power supply. (220±22) V, frequency (50±1) Hz.
7.1.2 Equipment for verification
7.2 Verification items
7.3 Verification method
7.3.1 Appearance inspection
Use visual inspection and hand-feeling inspection.
7.3.2 Insulation resistance
The instrument is not switched to working power at first; place the switch at on-position;
connect terminals of insulation resistance meter to AC input terminal of instrument and
enclosure respectively; operate in accordance with operation instructions of insulation
resistance meter; read the indicating value of insulation resistance meter.
7.3.3 Instrument calibration before verification
7.3.5 Instrument’s indication stability
Within a common-use range or a range of which the upper limit of measuring range is not
greater than 50 NTU, select polymer turbidity suspension liquid of which the nominal value
is at about 80% of the measuring range; read indicating value T1 after Instrument’s
reading become stable; observe instrument’s indicating value T1 for 30 min continuously;
record instrument’s indicating value Ti every 5 min. Calculate indication stability according
to following Formula; take δi with maximum absolute value to show instrument’s indication
stability.
7.3.7 Instrument’s indication error
Select Formazine standard solution (strong) from the same one (bottle); within a range of
which the upper limit of measuring range is not greater than 50 NTU, take 5 measuring
points uniformly; accurately dilute standard solution Ts that is used to prepare
corresponding turbidity value; measure each concentration value for 3 times to obtain
measured value Tm and average value Tm;
8 Verification results handling
Instrument that is verified qualified according to this regulation is awarded verification
certificate; see Annex D for the format of inner pages.
9 Verification cycle
Verification cycle of turbidimeter is 1 year.
Annex A
Preparation of Zero Turbidity Water
Use microfiltration membrane of which the pore diameter is not greater than 0.2 μm to
filter distilled water (or electrodialysis water, or ion exchange water); filtration shall be
repeated at least once; The filter liquor obtained is the zero turbidity water for verification.
Zero turbidity water is used for turbidimeter zero adjustment and dilution of Formazine
standard solution.
JJG 880-2006
JJF
National Metrology Technical Specifications
of the People's Republic of China
Turbidimeters
浊度计
Issued on. SEPTEMBER 06, 2006
Implemented on. MARCH 06, 2007
Issued by. State Administration for Quality Supervision and Inspection
and Quarantine
Verification Regulation of
Turbidimeters
Replacing JJG 880-1994
This regulation was approved by General Administration of Quality Supervision,
Inspection and Quarantine on September 6, 2006, and shall be implemented from March
6, 2007.
Jurisdictional organization.
National Technical Committee on Environmental Stoichiometry
Drafting organizations.
National Institute of Metrology, China
Shanghai Institute of Measurement and Testing Technology
Beijing Institute of Measurement and Testing Technology
This regulation is entrusted to and shall be responsibly interpreted by National
Technical Committee on Environmental Stoichiometry.
Main drafters of this regulation.
Zhang Wenge (National Institute of Metrology, China)
Participating drafters.
Qiu Yanhui (Beijing Institute of Measurement and Testing Technology)
Gu Jiayu (Beijing Institute of Measurement and Testing Technology)
Qi Xin (National Institute of Metrology, China)
Liu Junjie (National Institute of Metrology, China)
Table of Contents
1 Scope... 5
2 References... 5
3 Terms and unit of measurement... 5
4 Overview... 6
5 Requirements for metrological performance... 6
5.1 Instrument’s zero-drift... 6
5.2 Instrument’s indication stability... 6
5.3 Instrument’s repeatability... 6
5.4 Instrument’s indication error... 6
6 General technical requirements... 6
6.1 Appearance... 7
6.2 Insulation resistance... 7
7 Measuring instrument control... 7
7.1 Verification conditions... 7
7.2 Verification items... 8
7.3 Verification method... 8
8 Verification results handling... 10
9 Verification cycle... 10
Annex A Preparation of Zero Turbidity Water... 11
Annex B Calibration of Turbidity Standard Piece... 12
Annex C Format of Verification Record... 13
Annex D Format of Inner Pages of Verification Certificate... 15
Annex E Format of inner pages of verification results notification... 16
Verification Regulation of Turbidimeters
1 Scope
This regulation applies to initial verification, subsequent verification and in-use verification
of desktop and portable typhotoelectric turbidimeters for laboratory and field service that
are displayed through Formazine turbidity unit and the display results can be converted
into Formazine turbidity unit.
2 References
The following references apply to this regulation.
JJF 1001-1998 General Terms in Metrology and Their definitions
JJG 1015-2002 General Norm for Pattern Evaluation and Pattern Approval of
Measuring Instruments
ISO 7027.1999 Water quality- Determination of turbidity.
3 Terms and unit of measurement
Formazine -- Chinese translated name of Formazine;
This regulation adopts Formazine turbidity standard specified in International Standard
ISO7027 and issued by International Standard Organization, and adopts the “Unit” used in
this standard as turbidity measurement unit. According to different measurement modes,
there are mainly following turbidity units determined based on measurement standard of
Formazine standard solution.
4 Overview
Turbidimeter (hereinafter referred to as the instrument) is an instrument used to measure
the degree of scattering or attenuation of light generated by insoluble particulate matters
suspended in transparent liquid, and make quantitative characterization of content of
these suspended particulate matters.
5 Requirements for metrological performance
5.1 Instrument’s zero-drift
Instrument’s zero-drift shall not exceed ±1.5% of full scale value, within the measuring
range in 30 min.
5.3 Instrument’s repeatability
When measuring the same sample repeatedly, relative standard deviation of measured
value shall not be greater than 2%.
5.4 Instrument’s indication error
Relative indication error of instrument shall not be greater than ±10%.
6 General technical requirements
6.1 Appearance
6.2 Insulation resistance
Insulation resistance between power supply terminal and metal piece of instrument shell
shall not be less than 20 MΩ.
7 Measuring instrument control
Measuring instrument control includes initial verification, subsequent verification and
in-use verification.
7.1 Verification conditions
7.1.1 Environmental conditions.
Environmental conditions. 15°C〜30°C ;
Relative humidity. ≤80 % RH;
Power supply. (220±22) V, frequency (50±1) Hz.
7.1.2 Equipment for verification
7.2 Verification items
7.3 Verification method
7.3.1 Appearance inspection
Use visual inspection and hand-feeling inspection.
7.3.2 Insulation resistance
The instrument is not switched to working power at first; place the switch at on-position;
connect terminals of insulation resistance meter to AC input terminal of instrument and
enclosure respectively; operate in accordance with operation instructions of insulation
resistance meter; read the indicating value of insulation resistance meter.
7.3.3 Instrument calibration before verification
7.3.5 Instrument’s indication stability
Within a common-use range or a range of which the upper limit of measuring range is not
greater than 50 NTU, select polymer turbidity suspension liquid of which the nominal value
is at about 80% of the measuring range; read indicating value T1 after Instrument’s
reading become stable; observe instrument’s indicating value T1 for 30 min continuously;
record instrument’s indicating value Ti every 5 min. Calculate indication stability according
to following Formula; take δi with maximum absolute value to show instrument’s indication
stability.
7.3.7 Instrument’s indication error
Select Formazine standard solution (strong) from the same one (bottle); within a range of
which the upper limit of measuring range is not greater than 50 NTU, take 5 measuring
points uniformly; accurately dilute standard solution Ts that is used to prepare
corresponding turbidity value; measure each concentration value for 3 times to obtain
measured value Tm and average value Tm;
8 Verification results handling
Instrument that is verified qualified according to this regulation is awarded verification
certificate; see Annex D for the format of inner pages.
9 Verification cycle
Verification cycle of turbidimeter is 1 year.
Annex A
Preparation of Zero Turbidity Water
Use microfiltration membrane of which the pore diameter is not greater than 0.2 μm to
filter distilled water (or electrodialysis water, or ion exchange water); filtration shall be
repeated at least once; The filter liquor obtained is the zero turbidity water for verification.
Zero turbidity water is used for turbidimeter zero adjustment and dilution of Formazine
standard solution.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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