What is the use and precautions of the wind vane?

Wind speed and direction instrument

The working principle of the wind speed and direction indicator has been described above. The recommended FC-16025 hand-held wind speed and direction indicator is now described. It is convenient for everyone to better understand and master the use.

1, the wind direction measurement part
1) Before observing, check whether the wind direction part is vertically and firmly connected to the guard of the anemometer cup and rotate the tray nut in reverse to lower the tray supporting the table direction dial, so that the shaft tip is in contact with the prototype bearing.
2) The azimuth reading should be read when the wind direction pointer is stable during observation.

2, the wind speed measurement part

1) Confirm that the battery is installed in the instrument. This instrument uses 3 sections of 5#1.5 dry battery. Please be careful not to use rechargeable battery. Its output voltage is only 1.2V. The voltage is not enough. Open the rear cover of the instrument and it will be 3 Section 5# dry battery is installed in the battery holder. (Note that the battery electrode must be correct.) After the battery is installed, the instrument may be in a power-on state or may be in a power-off state. This is the power switch on the panel to control the power supply. On and off.
Please refer to the panel layout of the instrument. After the instrument is powered on, first perform the self-test of the display. All the strokes that may be used on the display are displayed for about 2 seconds, and then the instrument enters the measurement state.
The button functions are: A – instantaneous wind speed B – average wind speed C – instantaneous wind level D – average wind level E – corresponding waves
Instantaneous, average wind speed unit: m/s, instantaneous, average wind level unit: level, corresponding to wave height unit: m

2) When the instrument is running, measure the instantaneous wind speed, average wind speed, instantaneous wind level, average wind level, and corresponding wave height. Only one of the parameters can be displayed. The display parameters are switched by the wind speed display key and the wind level display key. Each time the wind speed key is pressed, the parameter is switched between the instantaneous wind speed and the average wind speed. Each time the wind level display key is pressed, the display parameter is at the instantaneous wind level, and the average wind level. The corresponding mark is also switched between the corresponding wave height and the sign of the unit at the same time.
Each time the wind speed button is pressed: a decimal point appears at the corresponding position when displayed. The wind speed and wave height parameters are retained after the decimal point, and the wind level displays an integer, and no decimal point is displayed.
The average wind speed, the average wind level, and the corresponding wave height require a sampling time of one minute. Therefore, within one minute after power-on, or within one minute after the latch is cancelled, the correct average value cannot be obtained. Wait until the sampling time is longer than one minute. The display will only display valid parameter values ​​in the future.

3) After the observation, in order to protect the shaft tip and the prototype bearing, the tray nut is rotated forward, the tray is raised, and the direction dial is lifted, so that the shaft tip and the jewel bearing are separated.
The latch display button toggles the instrument between the measured state and the latched state. When the measurement status is pressed, the instrument enters the latched state. After the measured value is latched, the displayed value is locked.
When the latch key is pressed in the latched state, the latch function disappears, indicating that the instrument returns to the measurement state.
Due to the small dry battery used, the stored energy is limited, so turn off the power in time after use, and remove the battery to extend the battery life.
Due to the strict mechanical structure inside the instrument, care should be taken when using it.

Wind speed and direction meter use precautions

1, the use of the environment:

1. It is forbidden to use an anemometer in a flammable gas environment.
2. It is forbidden to place the anemometer probe in a flammable gas. Failure to do so may result in fire or even explosion.
2, note:

1. Do not disassemble or modify the anemometer. Failure to do so may result in electric shock or fire.
2. In use, if the anemometer emits an unusual smell, sound or smoke, or if liquid flows into the interior of the anemometer,
Please turn off the battery immediately to remove the battery. Otherwise, there is a danger of electric shock, fire and damage to the anemometer.

3, maintenance:

1. Do not expose the probe and anemometer body to rain. Otherwise, there may be electric shock, fire and personal injury. Do not touch the internal sensor area of ​​the probe.
2. When the anemometer is not used for a long time, please take out the internal battery. Otherwise, the battery may leak, causing damage to the anemometer.
3. Do not place the anemometer in a place with high temperature, high humidity, dust and direct sunlight. Failure to do so may result in damage to internal components or deterioration of anemometer performance.
4. Do not wipe the anemometer with volatile liquid. Otherwise, the anemometer housing may be deformed and discolored. When the surface of the anemometer is stained, it can be wiped with a soft fabric and a neutral detergent.
5. Do not drop or press the anemometer. Failure to do so will result in malfunction or damage to the anemometer.
Instructions for use: Please use the anemometer correctly according to the requirements of the instruction manual. Improper use can result in electric shock, fire, and damage to the sensor.
6. Do not touch the sensor part of the probe while the anemometer is energized. Otherwise, it will affect the measurement results or cause damage to the internal circuit of the anemometer.

How to use the handheld wind speed meter!

Before using the hand-held anemometer, observe whether the pointer of the meter points to zero. If there is any offset, you can gently adjust the mechanical adjustment screw of the meter to return the pointer to zero point! After calibration, gently pull the screw plug to expose the probe (the length can be selected as needed), and make the red dot on the probe face the wind direction. According to the meter reading, check the calibration curve to find the measured wind speed.

How to use an anemometer

1. Before use, observe whether the pointer of the meter refers to the zero point. If there is an offset, gently adjust the mechanical adjustment screw of the meter to return the pointer to zero point;
2. Put the correction switch in the off positiona5c27d1ed21b0ef4c4f543bddac451da81cb3e30
3. Insert the measuring rod plug into the socket, the measuring rod is placed vertically upwards, the screw plug is pressed tight to seal the probe, the “correction switch” is placed at the full position, and the “full adjustment” knob is slowly adjusted to make the meter pointer full. Degree position
4. Set the “correction switch” to “zero position” and slowly adjust the “coarse adjustment” and “fine adjustment” two knobs to make the meter pointer point at the zero point.
5. After the above steps, gently pull the screw plug to expose the probe (the length can be selected according to the need), and make the red dot on the probe face the wind direction. According to the meter reading, check the calibration curve to find out. Measured wind speed
6. After measuring a few points (about 10 minutes), the above steps 3 and 4 must be repeated to standardize the current in the meter. After the test, the “correction switch” should be placed in the off position. An anemometer that converts a flow rate signal into an electrical signal that also measures fluid temperature or density. The principle is that a thin wire (heating wire) that is heated by electricity is placed in the airflow, and the heat dissipation amount of the hot wire in the airflow is related to the flow velocity, and the heat dissipation causes the temperature of the hot wire to change, causing the resistance change, and the flow rate signal is converted into electric signal.

It has two modes of operation:
1 constant flow type. The current through the hot wire remains unchanged. When the temperature changes, the resistance of the hot wire changes, and thus the voltage across the two changes, thereby measuring the flow rate;
2 thermostatic. The temperature of the hot wire remains the same, such as maintaining 150 ° C, the flow rate can be measured according to the current applied. The thermostatic type is more widely used than the constant current type. The length of the hot wire is generally in the range of 0.5 to 2 mm, and the diameter is in the range of 1 to 10 μm. The material is platinum, tungsten or platinum-rhodium alloy. If a thin metal film (thickness less than 0.1 micron) is used instead of the metal wire, it is a hot film anemometer, which functions similarly to the hot wire, but is mostly used to measure the liquid flow rate. In addition to the ordinary single line type, the hot line can also be a combined two-wire or three-wire type to measure the velocity component in all directions. The electric signal output from the hot line is amplified, compensated and digitized and input into the computer, which can improve the measurement accuracy, automatically complete the data post-processing process, and expand the speed measurement function, such as simultaneously completing the instantaneous value and the time average value, the combined speed and the sub-speed, and the turbulence. And measurement of other turbulence parameters. Compared with pitot tube, hot wire anemometer has small probe volume and small interference to flow field; fast response, can measure unsteady flow rate; can measure very low speed (such as as low as 0.3 m / s).