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Electronics Operating Temperature:
2.2 Theory of Operation
The MTII4200 transmitters precisely sense the position 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.
The head of the transmitter houses the sensing circuit, which detects 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 knowing the precise speed of these pulses. The time interval is converted
into a 4 - 20 mA loop signal.
3. INSTALLATION/MOUNTING
Mounting
The MTII4200 is designed to mount directly to the outside of the Magnicator II chamber.
1. Secure the transmitter to the chamber using the supplied hose clamps.
2. Align the low and high level range markings on the sensor housing with the actual measurement range .
3. Ensure that the clamps are tight.
4. To test if the gauge is properly tightened, pull up on the electronics housing. The gauge should not move.
16633 Foltz Industrial Parkway | Strongsville, OH 44149 | Telephone +1 (440) 572-1500 Facsimile: +1 (440)-238-8828
ENVIRONMENTAL
Humidity:
Vessel Pressure:
FIELD INSTALLATION
Mounting:
DISPLAY
Measured Variables:
Update Rate:
HART COMMUNICATIONS
Method of Communication:
Baud Rate:
Digital "0" Frequency:
Digital "1" Frequency:
Data Byte Structure:
Digital Process Variable Rate:
AGENCY APPROVALS
Factory Mutual (FM)
The Clark Reliance Corporation
Email:
sales@clark-reliance.com
0 to 100% R.H., non-condensing
-30 to 160°F (-34 to 71°C) ambient
Dependent on float pressure rating,
3/4 in. NPT fitting or flange mounting
Wiring:
2-wire connection, shielded cable or twisted pair to screw
terminals through a 3/4 in. NPT conduit opening
Level
3 seconds
Frequency Shift Keying (FSK) conforms with Bell 202
Modem Standard with respect to baud rate and digital "1"
and "0" frequencies.
1200 BPS
2200 Hz
1200 Hz
1 Start Bit, 8 Data Bits, 1 Odd Parity Bit, 1 Stop Bit
Poll/Response Model 2.0 per second
Explosion-proof:
Class I, Div 1, Groups B, C, D
Class II, Div 1, Groups E, F, G
Class III
| Web Site:
www.clark-reliance.com
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