ISO 12156-1:2018
Diesel fuel — Assessment of lubricity using the high-frequency reciprocating rig (HFRR) — Part 1: Test method
This document specifies a test method using the high-frequency reciprocating rig (HFRR), for assessing the lubricating property of diesel fuels, including those fuels which could contain a lubricity-enhancing additive. It defines two methods for measurement of the wear scar; Method "A" — Digital camera, and Method "B" — Visual observation.
This test method applies to fuels used in diesel engines.
NOTE It is not known if this test method will predict the performance of all additive/fuel combinations, including paraffinic fuels for which no additional correlation testing has been performed. Nevertheless, no data has been presented to suggest that such fuels are not within scope.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Preparation and calibration
8.1 Preparation of apparatus
8.1.1 Test plates and balls
8.1.2 Hardware
8.2 Calibration and correction
8.2.1 Temperature
8.2.2 Frequency
8.2.3 Stroke length
8.2.4 Test duration
8.2.5 Test rig performance
9 Test procedure
10 Measurement of wear scar
10.1 General
10.2 Method “A” — Digital camera
10.3 Method “B” — Visual observation
11 Test results
12 Precision
12.1 General
12.2 Repeatability, r
12.3 Reproducibility, R
13 Test report
Annex A (informative) Measurement of HFRR wear scars
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents and materials
6 Apparatus
7 Sampling
8 Preparation and calibration
8.1 Preparation of apparatus
8.1.1 Test plates and balls
8.1.2 Hardware
8.2 Calibration and correction
8.2.1 Temperature
8.2.2 Frequency
8.2.3 Stroke length
8.2.4 Test duration
8.2.5 Test rig performance
9 Test procedure
10 Measurement of wear scar
10.1 General
10.2 Method “A” — Digital camera
10.3 Method “B” — Visual observation
11 Test results
12 Precision
12.1 General
12.2 Repeatability, r
12.3 Reproducibility, R
13 Test report
Annex A (informative) Measurement of HFRR wear scars
Bibliography