ZTD Series Intelligent Displacer...0 pages

ZTD Series Intelligence Displacer Level (Interface) Transmitters

Summary
ZTD series intelligence displacer level (interface) transmitters are produced
by Dandong Top Electric Instrument Co. Ltd, cooperating with Fisher
Controls Company. We import the original FIELDVUE DLC3000 series
intelligence level controller, design and manufacture other parts ourselves.
ZTD is suitable for level, interface or density measurement with standard
output signal 4~20mA DC. Using a Model 275HART Communicator being
compatible with DLC3000 series intelligence level controllers, not only can
you check, configure, calibrate, or test the intelligent level transmitter, but
also, can receive the messages from a single controlling loop and load down
the information from field into control system.

Principle of Operation
ZTD series intelligence displacer level (interface) transmitter consists of
imported original FISHER DLC3000 series intelligence level controllers and measuring chamber (cage),
measuring mechanism, displacer and torque tube, etc. The liquid level change triggers the change of the
displacer’s position. It is transferred into the torque tube unit. This makes the torque tube and core axle rotate
synchronously.
At the same time, the magnetic steel parts that fixed at the core axle of the torch tube turns an angular shift
synchronously with the core axle. The Hall-effect sensor senses the magnet change and converts the magnet
signals into current signals. DLC3000 series intelligence level controller measures process variables with a
controller and relative electronic circuit, supplies current output, energizes LCD meter parts and supports HART
communication. Micro-controller receives the electric signals that have been temperature-compensated and
linearised. Meanwhile, compensates the liquid density change aroused by the change of the process temperature.
D/A output circuit receives the output from the micro-controller and supplies 4~20mA current output signals.
LCD can indicate analog output, process variables, process temperature (if RTD is installed), degrees of the torque
tube rotation and percent range of variable, etc.

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Add: No..10 Huanghai Street, Zhenxing District, Dandong City, Liaoning Province, P.R. China
P.C.: 118000
E-mail: davidsong@ddtop.com
Tel: +86-415-6227343
Fax: +86-415-6227341
Website: http://www.ddtop.com