Lightning Audio 7532 manual Technical data at a glance

7532 Technical data

10 Technical data

10.1Technical data at a glance

Application

Application

The 7500 RTG is used for highly accurate level measurement in storage tanks and can be applied in custody transfer applications. It meets the relevant requirements according to OIML R85 and API 3.1B.

•The 7532 RTG with planar antenna is specifically and only suited for stilling well applications with ranges up to 38 m (124 ft).

	Function and system design
Measuring principle	The 7500 RTG is a "downward-looking" measuring system, operating
	based on the time-of-flight method. It measures the distance from
	the reference point (process connection) to the product surface. Radar
	impulses are emitted by an antenna, reflected off the product surface
	and received again by the radar system.
Equipment architecture	The 7500 RTG can be used for measurement in a stilling well as well
	as in free space. The different instrument versions are applied as
	follows:
	• The 7532 RTG with planar antenna is the preferred device in stilling
	wells ≥ 150 mm.
	• The instruments are equipped with a passive 4…20 mA output with
	HART protocol.

	Input
Measured variable	The measured variable is the distance between a reference point
	(mounting flange) and a reflective surface (e.g. medium surface). The
	measured value and all parameters are displayed using either metrical
	SI-units or US/UK-units (inch, ft, …).
	The level is calculated based on the tank height entered.
	The level can be converted into other units (volume, mass) by means
	of a linearization.
	In order to compensate for non-linear effects like movement of the
	tank roof, an additional correction table (diptable) can be entered.
Measuring range	See page 15

	Output
Output signal	4…20 mA with HART protocol:
	this version can be operated via the PC operating software ToF Tool
	and Commuwin II. The instrument supports both point-to-point and
	multidrop operation.
Signal on alarm	Error information can be accessed via the following interfaces:
	• Local display:
	– Error symbol (see page 35)
	– Plain text display
	– LED’s: red LED continuously on = alarm, red LED flashes = warn-
	ing
	• Current output
	• Digital interface
Galvanic isolation	500 V towards ground.
	500 V between power supply and signal

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