Lightning Audio 7532 manual 11.4.5Particularities in approved operation, 11.4.6Definition of terms

7532 Appendix

11.4.5Particularities in "approved" operation

The 7500 RTG level radar is set to custody transfer mode after commissioning using a custody locking switch (see page 36). The position of the custody locking switch is secured and sealed using the sealing pin.

During custody transfer measurement, all custody transfer-relevant functions for operation are automatically locked, so that the device software can not be used, either via local operation or via digital communication settings. This locked status is displayed by the key symbol ().

7500 RTG radar devices continuously monitor the compliance with accuracy requirements for custody transfer measurements according to OIML R85. If, for example, the accuracy cannot be maintained due to quick surface movements, this is reported via a separate alarm in the local display (displays "#" symbol) and via digital communication.

11.4.6Definition of terms

For definitions and procedures please refer to the following documents:

•Manual of Petroleum Measurement Standards, Chapter 3 - Tank Gauging, Section 1.B - Standard Practice for Level Measurement of Liquid Hydrocarbons in Stationary Tanks by Automatic Tank Gauging, American Petroleum Institute, second edition, 2001

•OIML R 85, Organisation Internationale de Métrologie Légale, International Recommendation R 85, edition 1998 (E)

101