BS ISO 4266-5:2002

1 Scope
2 Normative reference
3 Terms and definitions
4 Precautions
   4.1 Safety precautions
   4.2 Equipment precautions
   4.3 General precautions
5 Accuracy
   5.1 General
   5.2 Intrinsic error of ATTs
   5.3 Calibration prior to installation
       5.3.1 General
       5.3.2 ATT calibrated as a system
       5.3.3 ATT calibrated by components
       5.3.4 Multiple-point ATTs
       5.3.5 Uncertainty of the reference
   5.4 Error caused by installation and operating conditions
   5.5 Overall accuracy
       5.5.1 General
       5.5.2 Use of ATT for fiscal/custody transfer purposes
6 Selection of ATTs
   6.1 General
   6.2 ATTs for fiscal/custody transfer purpose
7 Description of ATT equipment - Electrical temperature elements
   7.1 Resistance temperature detectors
   7.2 Other temperature elements
8 Installation of marine ATTs
   8.1 General
   8.2 Location of temperature-sensing element(s)
   8.3 Location of manual (temperature) gauge hatch
   8.4 Temperature measurement of inerted tanks
9 Calibration and on-board verification of marine ATTs
   9.1 Introduction
   9.2 Calibration of single-point temperature element
       ATTs for fiscal/custody transfer purposes
       9.2.1 Calibration prior to installation
       9.2.2 Initial verification at shipyard or during sea trials
   9.3 Calibration of multiple-point ATTs for fiscal/custody
       transfer purposes
       9.3.1 Calibration prior to installation
       9.3.2 Initial on-board verification at shipyard or
             during sea trials
   9.4 Subsequent verification of ATTs
       9.4.1 General
       9.4.2 Frequency of subsequent verification
       9.4.3 Record keeping
10 Data communication and receiving
Annex
A - Accuracy limitations of tank-temperature measurements
    on board marine vessels
Bibliography

Provides guidance on the selection, accuracy, installation, commissioning, calibration and verification of automatic tank thermometers (ATTs) in fiscal/custody transfer applications in which the ATT is used for measuring the temperature of petroleum and liquid petroleum products having a Reid vapour pressure less than 100 KPa, stored in cargo tanks on board marine vessels.

This part of ISO4266 gives guidance on the selection, accuracy, installation, commissioning, calibration and verification of automatic tank thermometers (ATTs) in fiscal/custody transfer applications in which the ATT is used for measuring the temperature of petroleum and liquid petroleum products having a Reid vapour pressure less than 100kPa, stored in cargo tanks on board marine vessels.

This part of ISO4266 is not applicable to the measurement of temperature in refrigerated storage tanks, or pressurized cargo tanks on board marine vessels.