Theory Of Operation; Accuracy; Warranty - MTS Systems Level Plus Operation And Installation Manual

Model MR Operation and Installation Manual
Theory of Operation, Accuracy, and Warranty

Theory of operation

Magnetostrictive M-Series transmitters precisely sense the posi-
tion of an external float by applying an interrogation pulse to a
waveguide medium. This current pulse causes a magnetic field
to instantly surround the waveguide. The magnet installed within
the float also creates a magnetic field. Where the magnetic fields
from the waveguide and float intersect, a rotational force is created
(waveguide twist). This, in turn, creates a torsional-sonic pulse that
travels along the waveguide as shown in Figure 4.
The head of the transmitter houses the sensing circuit, which de-
tects the torsional-sonic pulse and converts it to an electrical pulse.
The distance from a reference point to the float is determined by
measuring the time interval between the initiating current pulse and
the return pulse and precisely knowing the speed of these pulses.
The time interval is converted into a level measurement.

Accuracy

For magnetostrictive transmitters inherent accuracy is measured in terms of non-linearity. Non-linearity is a measurement of any imperfec-
tions in the waveguide that are reflected in the linearity of the transmitter's output. MTS tolerances reflect a maximum non-linearity of 0.02%
of full scale. MTS is able to achieve such strict tolerances by manufacturing all of its own waveguide from a proprietary alloy and testing 100%
of all transmitters before shipping.

Warranty

Important:
Contact Technical Support or Customer Service for assistance if you
suspect that the transmitter is not working correctly. Technical support
can assist you with troubleshooting, part replacement, and
Material Authorization
(RMA) information if required.
Level Plus ® Liquid-Level Transmitters - M-Series Model MR Analog Transmitter
Operation and Installation Manual, Part No.: 550720 Revision K (EN) 02/2016
All M-Series transmitters come with a two year limited warranty from
the factory shipment date. A Return Materials Authorization (RMA)
number is required and must accompany any transmitter returns.
Any unit that was used in a process must be properly cleaned in
accordance with OSHA standards, before it is returned to the factory.
Returned
A Material Safety Data Sheet (MSDS) must also accompany the
transmitter that was used in any process.
6
Figure 4. Theory of operation
MTS Sensors