WD17

MICROWAVE SOLIDS FLOW SENSOR

Equipped with a sensitivity margin indicator and a filter for screening unnecessary incoming doppler signals

The GD一MSFS一B Microwave Solids Flow Sensor detects moving solids utilizing

microwave high penetrability and the Doppler effect.
The sensing head transmits microwaves toward the target material.
A portion of the microwaves are reflected back to the sensing head and analysed as to

whether they are from a moving or stationary object.
The highly-penetrable microwave passes through a buildup on the head and even through

pipe made of non-conducting materials such as plastics.
It is best suited for detecting such materials as powders, granules, etc, moving through a

vacuum pipeline.

Penetrability / Doppler effect of microwaves

On the other hand, when microwaves are transmitted and reflected back to the sensor from a moving object, a frequency shift is generated

between the transmitted and the reflected waves by means of the Doppler Principles, which is converted to a motion signal and actuated

an output relay.

 High penetration

Easily penetrates process buildup on antenna,firebrick,refractoryetc.,
The sensor can be installed on the exterior of a plastic or ceramic pipe and detect the flow of the material in the pipe.

 Non-intrusive installation

Mounted flush, no intrusion or damage to material flow.

 Equipped with a filter for screening

This function eliminates unnecessary incoming Doppler signals such as, signals from a vibrating pipe or conveyer and improves the S/N ratio.
This enables the sensor to be used in places where previously, non-contact flow detection was hardly possible.

 Equipped with a sensitivity margin indicator

The received power level and the sensitivity set point are indicated on the sensor allowing for easy visual adjustment and maintenance of the

sensor.
The indicator clearly displays the advantage of the filter screening effect.

 Equipped with an alarm output

Microwave circuit failure and rising temperature can be detected and output.

 Selectable detection mode
Either flow or Non-flow detection mode may be selected.

 Equipped with a test button
LED indicators indicate microwave circuit status and internal temperature when the test button is pushed.

 Equipped with a Doppler signal incoming indicator
An LED indicator turns on when the Doppler signal is received.
Flow and non-flow conditions are clearly displayed.

 Analog output (Optional)
The Doppler signal receiving power is output as an analog current.

2. Turn the delay time rheostat⑧counter-clockwise to set it at the minimumpoint.

3. Turn the coarse sensitivity rheostat⑥fully clockwise to set it at-maximum.

Next, turn the fine sensitivity rheostat⑦fully counter-clockwise to set it aminimum

4. Confirm the output indicator④OUT(orange) is off while operating the pipeline with an empty condition. If the output indicator ④ OUT

(orange) is
on, turn the coarse sensitivity rheostat ⑥ counter clockwise slowly and find the point where the output indicator ④ OUT(orange) turns off.

This is the actuating point for the non-flow condition.

5. While operating the pipeline with a continuous flow to be detected, you can see the output indicator ④ OUT(orange) turn on.Turn the

coarse sensitivity   rheostat ⑥ further counter clock wise slowly and find the point where the output indicator ④ OUT (orange) turns off.

This is the actuating point for the flow condition.

Specifications

Pay attention to the following points during installation:

 For liquid applications, try to ensure that the mounting flange is parallel to the liquid surface sothat the transmitted electromagnetic wave

is

incident perpendicular to the liquid surface.

 For solid applications, you can suitably relax the installation angle. If the material accumulationangle is relatively large and the blind spot

that is required to measure is relatively small, it isrecommended to use a universal structure to adjust the transmitting direction to be

nearlyvertical to the inclined material surface.

During installing, try to avoid interfering objects within the radar beam range, such as mixing blades, protrusions and other objects.

Interfering objects can easily generate interference signals and affectthe normal operation of the radar.

See below for typical working conditions:

 Keep the antenna beam range free of any interference, such as ladders and steps:

 Avoid the contact between antenna beam and feeding inlet:

 At least 20cm away from the vessel wall when mounting to avoid incorrect readings:

 Conical vessels that wish to monitor the complete loading and unloading process require the useof a gimbaled flange to ensure that the

beam is directed to the bottom of the vessel as far aspossible, otherwise measurements at the bottom of the vessel may be inaccurate, as

shown inFigure 4-4. If the bottom material level is negligible, there is no need to use a gimbaledstructure.