Advanced microprocessor Unique Echo Discovery echo treatment technology Energy converter built-in temperature sensor

>> Principle

The working principle of ultrasonic level meter is that: when the ultrasonic pulse sent by energy converter (detector) meets the surface of measured medium, the reflected echo will be received by the same energy converter and converted into electrical signal. The ultrasonic pulse travels at the speed of sound wave. The needed time interval from launching to receiving the ultrasonic pulse is directly proportional to the distance from converter to the surface of measured medium. The relationships among this distance value S, acoustic speed C and transmitting time T can be indicated by formula: S=C×T/2.

For adopting advanced microprocessor and unique Echo Discovery echo treatment technology, ultrasonic level meter can be used in kinds of complex working conditions.

>> Characteristics

For adopting advanced microprocessor and unique Echo Discovery echo disposing technology, ultrasonic level meter can be used in kinds of complex working conditions.

“False echo study” function makes the instrument correctly verify true echo and obtain accurate measuring results under working conditions with multiple false echo.

Energy converter built-in temperature sensor can realize the temperature compensation of measured value.

Ultrasonic energy converter adopts the best phonics matching technology, which makes its transmitting power transmit more effectively to promote the signal strength and realize accurate measurement.

Technical parameters 

>> Normal data

Process connection

-          Process connection WPUM304            Thread, flange

-          Process connection WPUM308            Thread, flange

-          Process connection WPUM315            Hanging bracket or locking flange, stainless steel 316L

Material

-          Energy converter     PTFE, PU/PC

-          Sealing of energy converter   silica gel

-          Shell    Plastic PBT-FR; aluminum

-          Sealing between shell and shell cover     Silastic

-          The window on shell used for View Point    Makrolan

-          Grounding terminal      Stainless steel

Weight

-          WPUM304 and 308     1.8~3.0kg (decided by process connection and shell)

-          WPUM315            2.7~5.0kg (decided by process connection and shell)

>> Power supply voltage

Two-wire system

-          WPUM304 and 308 two-wire system

-          Non-explosion      15~35VDC

-          Intrinsic safety      15~30VDC

-          WPUM315 two-wire system     20~36VDC

Power consumption

Permissible ripple wave

- less than 100Hz            Uss less than 1V

- less than 100Hz~100KHz    Uss less than 10mV

Four-wire system

Power supply voltage    24V DC±10%

Power consumption     max.4VA, 2.1W

Output parameter

Output signal          4~20mA/HART

Resolution            1.6μA

Fault signal           Current output unchanged; 20.5mA; 22mA; 3.8mA

-          Two-wire system load resistance   see the following figuration

-          Four-wire system load resistance   Max. 500Ω

Integral time          0~99s, adjustable

Load resistance picture for two-wire system

Ultrasonic Level Meter