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IV. ESSENTIAL HEALTH AND SAFETY REQUIREMENTS
Covered by "II. GENERAL SAFETY " and "II. GENERAL SAFETY " and "III. SPECIAL CONDITIONS FOR SAFE
USE".
All national, federal, state, municipal, and local codes, laws and applicable standards must apply!
WARNING: Among others: ENERGIZED MACHINERY, PRESSURIZED VESSELS, LIVE VALVES, WIRES, FALLING
OBJECTS, SLIPPERY, SHARP SURFACES, HEIGHTS, HOT, COLD, ACIDIC, CAUSTIC, VOLATILE, TOXIC AND
EXPLOSIVE MATERIALS POSE A GREAT RISK OF SERIOUS INJURY, PERMANENT DISABILITY AND DEATH!
Only trained and authorized professional is allowed to mount, set up, alter the settings or operate the device. In fit
and able condition and in the required personal protective equipment.
The level transmitter instrument is not a plant safety device.
V. PRODUCT DESCRIPTION
FUNCTION
The TDR-3000 two-wire guided microwave level transmitter uses the TDR (Time Domain Reflectometry) principle.
The instrument sends low power nanosecond-wide pulses along an electrically conductive probe with a known
propagation speed (the speed of light). As the pulse reaches the surface of the medium or phase of two liquids
(altered dielectric constant ԑ
signal depends on the dielectric constant ԑ
electrical voltage signal and processed by the electronics. Level distance is directly proportional to the time of flight
of the pulse, this measured level distance then can be used up as is. Alternatively derived values can be calculated
from it. Such as volume and mass. The choice will be the main output of the level transmitter: The Primary Variable
(PV) which gets converted into 4-20 mA loop current in single drop mode. Transmitted loop current is also displayed
on the LCD display. Numerical data transmission is a parallel option via HART messages. The TDR technology is
unaffected by the other properties of the medium as well as that of the space above it.
APPLICATIONS
Designed for measuring the distance, level, volume of liquids, pastes, slurries and powder products; applicable in
tanks, silos, rigid pipe, reaction vessel and level reference vessel. The guided radar wave can permeate much deeper
through disturbances than free space radar or ultrasonic.
FEATURES
•
Simple to install in new tanks or retrofit existing tanks
•
Can be installed while tank is in service
•
Does not require special configuration to compensate for environmental or structural conditions
•
Factory calibrated and configured
•
Transmitter design minimizes maintenance requirements
TDR180003 Rev. I
), a part of it is reflected back to the electronic module. The efficiency of the reflected
r
difference of the mediums or layers. The reflected pulse is detected as an
r
3
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