JJG 646-2006 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| JJG 646-2006 | English | 145 |
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Verification Regulation of Locomotive Pipette
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| JJG 646-1990 | English | 279 |
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Verification Regulation of Quantitative Adjustable Bipet
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JJG 646-2006: Verification Regulation of Locomotive Pipette---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/JJG646-2006
JJG
National Metrological Verification Regulation
of the People's Republic of China
Locomotive Pipette
Issued on. DECEMBER 08, 2006
Implemented on. JUNE 08, 2007
Issued by. The State Administration of Quality Supervision, Inspection
and Quarantine
This Regulation was approved by the General Administration of Quality Supervision,
Inspection and Quarantine of the People’s Republic of China on December 8, 2006 and
was implemented on June 8, 2007.
Jurisdiction organization. National Technical Committee of Flow Capacity Measurement
Main drafting organization. National Institute of Metrology
Participating organization. Shanghai Institute of Measurement and Testing Technology
National Technical Committee of Flow Capacity Measurement is responsible for the
interpretation of this Regulation
Main drafter of this Regulation.
Verification Regulation of
Locomotive Pipette
replacing JJG 646-1990
Zhang Long (National Institute of Metrology Science)
Participating drafters.
Tong Lin (National Institute of Metrology Science)
Bao Xuesong (National Institute of Metrology Science)
Zhang Hongya (Shanghai Institute of Measurement and Metrology Technology)
Table of Contents
1 Scope... 5
2 Cited reference... 5
3 Terms and measurement units... 5
4 Overview... 6
5 Metrological properties requirements... 6
6 General technical requirements... 8
6.1 Appearance requirements... 8
6.2 Piston... 8
6.3 Regulator... 8
6.4 Aspirating-nozzle... 8
6.5 Air-tightness... 8
6 Metrological measuring tool control... 8
7.1 Verification conditions... 8
7.2 Verification items... 9
7.3 Verification method... 9
7.4 Verification results processing... 13
7.5 Verification period... 13
Annex A Schematic diagrams for various locomotive pipettes... 14
Annex B K(t) value table... 17
Annex C Recording format of locomotive pipette verification... 18
Verification Regulation of Locomotive Pipette
1 Scope
This Regulation applies to the initial verification, subsequent verification and in-service
inspection of locomotive pipette.
2 Cited reference
This Regulation cites the following document.
GB 6682-1992 Water for analytical laboratory use – Specification and test methods
Pay attention to use the current valid version of the above cited reference in using this
Regulation.
3 Terms and measurement units
3.1 Locomotive pipette
Measuring instrument with a certain scale range that can suck the liquid from container
and transfer it into another container (Filling injector, sample-filling storage, aspirator etc.
collectively referred to as locomotive pipettes).
3.2 Adjustable locomotive pipette
Locomotive pipette whose volume value can be adjusted.
3.3 Quantitative locomotive pipette
Locomotive pipette with single volume value.
3.4 Aspirating-nozzle
The part installed on the lower end of locomotive pipette and used to suck and discharge
liquid.
3.5 Display window
The window on locomotive pipette displaying volume value.
3.6 Suction tube
The connecting member between locomotive pipette and aspirating-nozzle.
4 Overview
Locomotive pipettes are mainly used in environmental protection, medicine, food and
health research department, and other departments to sample liquid or add liquid in
biochemical analysis and assays. It is a piston pipette working with the principle of air
discharge and determining the volume of the locomotive pipette through the moving
distance of piston in piston sleeve.
5 Metrological properties requirements
At the standard temperature 20°C, the volume permissible tolerance and measurement
repeatability of the locomotive pipette shall meet the requirements in Table 1.
6 General technical requirements
6.1 Appearance requirements
6.2 Piston
The piston of locomotive pipette shall be able to move up and down flexibly with clear sub-
block boundaries when being pressed.
6.3 Regulator
The display window of locomotive pipette shall be flexible in rotation with clear and
complete indicating numbers in the action of regulating volume.
6.4 Aspirating-nozzle
6.5 Air-tightness
Under 0.04 MPa, the locomotive pipette shall have no air leakage phenomenon in 5
seconds.
6 Metrological measuring tool control
Metrological measuring tool control includes initial verification, subsequent verification and
in-service inspection.
7.1 Verification conditions
7.1.1 Verification environment
The locomotive pipette shall be verified under the condition at (20±5)°C of room
temperature, and the change of room temperature is not larger than 1°C/h.
7.3 Verification method
7.3.1 Appearance inspection
Observe the locomotive pipette to verify through eye-inspection, touching or magnifying
glass; the appearance shall meet the requirements of 6.1.
7.3.2 Air-tightness inspection
7.3.3 Volume verification
Adopt measurement method to verify the locomotive pipette.
7.3.3.1 Preparation before verification
The selected aspirating-nozzle shall match with the aspirating-rod. At the lower end of the
aspirating-rod of locomotive pipette, gently turn the aspirating-nozzle to ensue the air-
tightness of locomotive pipette; there shall be no hanging-water phenomena after the
process of several times of aspirating and discharging.
7.3.4 Data processing
7.3.4.1 Calculation of the actual volume of locomotive pipette
Substitute the mass value, temperature value, and air density value measured by
implementing 7.3.3.2(1) ~ (5) into the following equation; the actual volume of the
locomotive pipette at the standard temperature, 20°C, can be obtained.
Where.
JJG 646-2006
JJG
National Metrological Verification Regulation
of the People's Republic of China
Locomotive Pipette
Issued on. DECEMBER 08, 2006
Implemented on. JUNE 08, 2007
Issued by. The State Administration of Quality Supervision, Inspection
and Quarantine
This Regulation was approved by the General Administration of Quality Supervision,
Inspection and Quarantine of the People’s Republic of China on December 8, 2006 and
was implemented on June 8, 2007.
Jurisdiction organization. National Technical Committee of Flow Capacity Measurement
Main drafting organization. National Institute of Metrology
Participating organization. Shanghai Institute of Measurement and Testing Technology
National Technical Committee of Flow Capacity Measurement is responsible for the
interpretation of this Regulation
Main drafter of this Regulation.
Verification Regulation of
Locomotive Pipette
replacing JJG 646-1990
Zhang Long (National Institute of Metrology Science)
Participating drafters.
Tong Lin (National Institute of Metrology Science)
Bao Xuesong (National Institute of Metrology Science)
Zhang Hongya (Shanghai Institute of Measurement and Metrology Technology)
Table of Contents
1 Scope... 5
2 Cited reference... 5
3 Terms and measurement units... 5
4 Overview... 6
5 Metrological properties requirements... 6
6 General technical requirements... 8
6.1 Appearance requirements... 8
6.2 Piston... 8
6.3 Regulator... 8
6.4 Aspirating-nozzle... 8
6.5 Air-tightness... 8
6 Metrological measuring tool control... 8
7.1 Verification conditions... 8
7.2 Verification items... 9
7.3 Verification method... 9
7.4 Verification results processing... 13
7.5 Verification period... 13
Annex A Schematic diagrams for various locomotive pipettes... 14
Annex B K(t) value table... 17
Annex C Recording format of locomotive pipette verification... 18
Verification Regulation of Locomotive Pipette
1 Scope
This Regulation applies to the initial verification, subsequent verification and in-service
inspection of locomotive pipette.
2 Cited reference
This Regulation cites the following document.
GB 6682-1992 Water for analytical laboratory use – Specification and test methods
Pay attention to use the current valid version of the above cited reference in using this
Regulation.
3 Terms and measurement units
3.1 Locomotive pipette
Measuring instrument with a certain scale range that can suck the liquid from container
and transfer it into another container (Filling injector, sample-filling storage, aspirator etc.
collectively referred to as locomotive pipettes).
3.2 Adjustable locomotive pipette
Locomotive pipette whose volume value can be adjusted.
3.3 Quantitative locomotive pipette
Locomotive pipette with single volume value.
3.4 Aspirating-nozzle
The part installed on the lower end of locomotive pipette and used to suck and discharge
liquid.
3.5 Display window
The window on locomotive pipette displaying volume value.
3.6 Suction tube
The connecting member between locomotive pipette and aspirating-nozzle.
4 Overview
Locomotive pipettes are mainly used in environmental protection, medicine, food and
health research department, and other departments to sample liquid or add liquid in
biochemical analysis and assays. It is a piston pipette working with the principle of air
discharge and determining the volume of the locomotive pipette through the moving
distance of piston in piston sleeve.
5 Metrological properties requirements
At the standard temperature 20°C, the volume permissible tolerance and measurement
repeatability of the locomotive pipette shall meet the requirements in Table 1.
6 General technical requirements
6.1 Appearance requirements
6.2 Piston
The piston of locomotive pipette shall be able to move up and down flexibly with clear sub-
block boundaries when being pressed.
6.3 Regulator
The display window of locomotive pipette shall be flexible in rotation with clear and
complete indicating numbers in the action of regulating volume.
6.4 Aspirating-nozzle
6.5 Air-tightness
Under 0.04 MPa, the locomotive pipette shall have no air leakage phenomenon in 5
seconds.
6 Metrological measuring tool control
Metrological measuring tool control includes initial verification, subsequent verification and
in-service inspection.
7.1 Verification conditions
7.1.1 Verification environment
The locomotive pipette shall be verified under the condition at (20±5)°C of room
temperature, and the change of room temperature is not larger than 1°C/h.
7.3 Verification method
7.3.1 Appearance inspection
Observe the locomotive pipette to verify through eye-inspection, touching or magnifying
glass; the appearance shall meet the requirements of 6.1.
7.3.2 Air-tightness inspection
7.3.3 Volume verification
Adopt measurement method to verify the locomotive pipette.
7.3.3.1 Preparation before verification
The selected aspirating-nozzle shall match with the aspirating-rod. At the lower end of the
aspirating-rod of locomotive pipette, gently turn the aspirating-nozzle to ensue the air-
tightness of locomotive pipette; there shall be no hanging-water phenomena after the
process of several times of aspirating and discharging.
7.3.4 Data processing
7.3.4.1 Calculation of the actual volume of locomotive pipette
Substitute the mass value, temperature value, and air density value measured by
implementing 7.3.3.2(1) ~ (5) into the following equation; the actual volume of the
locomotive pipette at the standard temperature, 20°C, can be obtained.
Where.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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