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Rice Moisture Meters 

​In 2015 APLMF agreed to summarise the test procedures used in each APLMF training course and then to survey its members to validate the test procedures and to provide some quality control. The validated test procedures will be later used to develop eLearning modules. 

The summary test procedures are provided to guide economies wishing to follow OIML recommendations. They contain abbreviated terms and formulae which are defined in the relevant OIML recommendation.

Information relating to rice moisture meters:
SUMMARY OF TEST PROCEDURES USED TO VERIFY RICE MOISTURE METERS
  • These test procedures are based on OIML R 59.
  • Please note tests used to compile this summary are fully described in the document APLMF Guide 6 - Guide on Rice Moisture Measurement.
​Test Name
​Procedures Description
Environmental condition
  • ​The room temperature is in a range from 20 °C to 30 °C (with stability within ±1 °C).
  • The relative humidity is in a range from 30 % to 70 % (with stability within ±5 %). 
  • Place the moisture meter under test (MUT) and reference samples at the constant environmental condition at least 3 hours before the test.
Reference samples​ 
  • ​Prepare a set of reference samples of rice with different levels of moisture content (5 levels or more).
  • The above levels shall include a range of moisture content from 10 % to 20 %. 
  • Each sample shall be homogenized. 
  • The reference values of moisture content of the reference samples have been measured in advance with a reference (dry oven) method or a primary standard moisture meter.
Visual and electrical inspections​
  • There are no damages in the housing, display and sample holder.
  • LCD (liquid crystal display) functions correctly.
  • Instrument temperature agrees with the room temperature within ± 3 ºC.
  • Battery voltage is within a normal range (use a self-checking function).
  • Electrical performance of the meter is normal (use a checker-kit).
Measurement of errors
  •  Measure moisture contents of the reference samples using the moisture meter under test (MUT) at different levels (5 levels or more). 
  • Repeat at least 5 measurements at each level of moisture content.
  • Averages of the measurement results agree those of reference samples within MPE (maximum permissible error) specified by the national/regional authority.
SUMMARY OF ECONOMY REPORTS
This report is unavailable for rice moisture meters. 
SURVEY RESULTS ON ADOPTING THE RICE MOISTURE METER TEST PROCEDURES

Picture
Test name
Total economies surveyed
Adopted
Not implemented
Economies not responded
​1. Environmental condition
19
11
1
7
​2. Reference samples
19
12
1
7
​3. Visual and electrical inspections
19
12
1
7
​4. Measurement of errors 
19
11
1
7
​Economies responded
Cambodia, Canada, Hong Kong China, Indonesia, Japan, Malaysia, Mongolia, New Zealand, Papua New Guinea,  Chinese Taipei, Thailand, Vietnam

Economies not responded
Australia, China, DPR of Korea, Republic of Korea, Philippines, Singapore, United States of America
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The Asia-Pacific Legal Metrology Forum APLMF is a grouping of legal metrology authorities, whose objective is the development of legal metrology and the promotion of free and open trade in the region through the harmonisation and removal of technical or administrative barriers to trade in the field of legal metrology.
APLMF 2004-2015
  • About APLMF
    • Mission, Purpose and Objectives
    • Who We Are
    • Membership Criteria
    • Full Members >
      • Australia
      • Brunei Darussalam
      • Cambodia
      • Canada
      • People's Republic of China
      • Hong Kong, China
      • Indonesia
      • Japan
      • Kiribati
      • Republic of Korea
      • Malaysia
      • Mongolia
      • New Zealand
      • Papua New Guinea
      • Peru
      • Philippines
      • Singapore
      • Chinese Taipei
      • Thailand
      • United States of America
      • Vietnam
    • Corresponding Members >
      • Lao PDR
      • Russian Federation
  • APLMF Business
    • Memorandum of Understanding Revision 2022
    • Memorandum of Understanding
    • Strategic Plan
    • Development and Approval of Guide Documents
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    • APLMF Recognition Awards
    • Annual Forum and Working Group Meetings >
      • Japan 2016 >
        • Japan Meeting Documents
        • Japan Meeting Programme and Templates
        • Japan Meeting Registration
        • Japan Venue, Accommodation and Transport
      • Cambodia 2017 >
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      • Vietnam 2019 >
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        • Online Programme and Templates
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        • 27th Online Registration
      • Online Meeting 2021 >
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        • 28th Online Programme and Templates
      • Online Meeting 2022 >
        • 29th Online Registration
        • 29th Online Meeting Documents
        • 29th Online Programme and Templates
  • Metrology Basics
    • What is Metrology
    • ​​International & Regional Metrology Organisations
  • Training & Development
    • Training Overview
    • MEDEA Training Programme >
      • MEDEA 1 (2013 to 2018) >
        • Prepackaged Goods, Nanning China, April 2018
      • MEDEA 2 (May 2018 to 2021)
      • MEDEA 3 (May 2021 to 2024)
    • Training Videos
    • Active Working Groups Overview >
      • Goods Packed by Measure
      • Metrological Control Systems
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      • Quality Measurement of Agricultural Products
      • NAWI
      • Utility Meters
    • Subject Matter Experts
    • Disbanded Working Groups Overview >
      • Medical Measurements
      • Mutual Recognition Arrangements
      • Training
  • News & Publications
    • APLMF Guides >
      • Guide Test Procedures >
        • Average Quantity System
        • Bulk flowmeters
        • CNG Dispensers
        • Domestic water meters
        • Fuel Dispensers
        • Non-automatic weighing instruments
        • Non-automatic weighing instruments including substitution
        • Rice Moisture Meters
        • Taxi Meters
        • Electricity Meters
    • News
    • Surveys
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  • Full Members Only
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    • Member Area >
      • 28th Report Approval Voting
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      • 26th Minutes Approval Voting
      • 2021-25 Strategic Plan Approval Voting
      • 2019 Financial Report Approval Voting
      • 25th Minutes Approval Voting
      • 2018 Financial Report Approval Voting
      • 2019 MOU with PTB Voting
      • 2019 Executive Committee Appointment - Vote
    • ​​Working Group Area >
      • Goods Packed by Measure Documents under Development
      • QMAP Documents under Development
      • Utility Measures Documents under Development
      • Metrological Control Systems Documents under Development
    • Training Resources >
      • Grain Moisture Measurement
      • Fuel Dispensers
      • Taxi Meters
      • Weighing Instruments
  • Training