Appendix

Radar Tank Gauge

 

 

11.4.3Custody transfer mode

7500 RTG is a weight and measure approved level transmitter. Either the innage or the ullage can be selected as the custody transfer variable.

The selected variable is the basis for the subsequent calculation of the current amount of product in a tank, along with other measured variables such as (average) temperature and pressure.

This opens up numerous application options in custody transfer:

•Quantity calculation of mineral oils

•Quantity calculation of alcohols

11.4.4Weight and measure approval, Standards Authorities ap- proval, Compulsory reapproval

The type approvals for custody transfer issued by the PTB and NMi, a copy of which is enclosed with every device, prove the fundamental suitability of the various types for custody transfer.

In addition to this, the accuracy of every single device is documented using a calibration certificate, which is issued in the factory after the device has been tested on a reference test rig.

On request, a separate initial verification of the devices can be carried out with a National Standards Authorities inspector present, who issues a preliminary test certifi- cate for every device. In the initial verification, the device is tested to ensure that it com- plies with the limit of error in legal metrology, which lies at +-2mm for radar measuring devices in Germany.

Essentially, this proves that the devices are weight and measure approved. The devices must not, however, be used in custody transfer mode straight away.

The measuring device is not approved until after the approval after installation by the Standards Authorities. For this, the device's level measurement is compared with the tank gauging by a National Standards Authorities inspector using manual dips (also "Ini- tial verification"). As a rule, a quiescent tank gauging is dipped by hand three times in a row and then compared with the value displayed by the level radar. Depending on national regulations, the transfer error limit, calculated as the arithmetic mean of the absolute deviations of all three measurements, must not exceed double the limit of error in legal metrology (compare, for example, the German "Eichordnung" or the American "API 3.1B", in which the necessary procedures are also defined).

Depending on national regulations, this test is repeated with various tank gaugings. Using linearization tables to compensate any non-linearities that occur in measurement is permitted. For this, the 7500 RTG level radar offers a special dip table, compare “Mounting calibration with VU 331” on page 57.

After the measurement has been approved by an inspector, he seals the level radar at the stamp position and thereby also secures the programming status of the device.

Those operating an approved level transmitter are obligated to obtain reapproval in accordance with the applicable national regulations from the Standards Authorities.

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Installation and Operations Manual

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Lightning Audio 7532 manual Custody transfer mode, Installation and Operations Manual
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7532 specifications

Lightning Audio 7532 is an innovative car audio amplifier designed to enhance the overall sound experience in vehicles. With a focus on delivering high-quality audio performance, this amplifier stands out with its robust features and cutting-edge technologies.

One of the primary characteristics of the Lightning Audio 7532 is its power output. The amplifier is capable of delivering an impressive 300 watts of RMS power, making it suitable for a wide range of audio systems. This power enables users to drive their speakers and subwoofers with clarity and precision, resulting in a dynamic listening experience. The amplifier has a two-channel configuration, which means it can efficiently amplify signals for front and rear speakers or can be bridged to drive a single subwoofer.

The Lightning Audio 7532 incorporates advanced technologies that enhance its performance. It features a high-pass and low-pass filter, allowing users to customize the audio output according to their preferences. This feature is particularly beneficial for those who wish to tailor their sound system's frequency response to suit different musical genres or personal tastes. Moreover, the amplifier includes a variable gain control, enabling users to adjust the overall volume and maintain optimal sound clarity without distortion.

Another notable aspect of the Lightning Audio 7532 is its thermal protection circuitry. This technology prevents the amplifier from overheating, ensuring reliable performance even during extended periods of use. Additionally, the amplifier is designed with durable components, contributing to its longevity and resilience against the rigors of automotive environments.

The installation process of the Lightning Audio 7532 is simplified by its compact size and user-friendly design. It features a clear layout for terminal connections, allowing for easy wiring and setup. This amplifier can easily fit into tight spaces within a vehicle, making it a versatile option for various car models.

In conclusion, the Lightning Audio 7532 amplifier combines power, flexibility, and durability, making it an excellent choice for car audio enthusiasts. With its impressive specifications and user-centric features, it promises to elevate any audio system and deliver an immersive experience on the road. Whether for everyday driving or long journeys, the Lightning Audio 7532 amplifies sound enjoyment and brings music to life in a way that resonates with every listener.
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