Anemometer measurement methods are those
The wind speed probe is a sensitive part, when a constant current flows through its heating coil, its sensitive part, the temperature rises and reaches a certain value in the still air. At this time, the measuring element within the thermocouple to produce the corresponding thermal potential, and is transmitted to the measurement of the indication system, the thermal potential and the circuit generated by the reference counterpotential to cancel each other, so that the output signal is zero, the instrument pointer also points to the zero point accordingly. If the wind speed probe end of the heat-sensitive parts exposed to the air flow, due to heat exchange, this will cause the thermocouple thermal potential changes, and compared with the reference counterpotential produces a weak difference signal, this signal is measured by the instrumentation system to amplify and promote the meter, the value of the pointer can be read out the size of the measured wind speed.
Thermal anemometer
(1)Put the instrument horizontally, make the key switch in the original position (up).
(2) Adjust the mechanical zero point of the meter so that the needle points to zero.
(3) Place the probe rod vertically upwards, so that its heat-sensitive parts are all pressed into the rod tube, and the wind speed probe plug into the "probe" socket.
(4) Press the "power" key (the first from the left) to adjust the "amplifier zero", potentiometer so that the pointer points to zero.
(5) Press the "1m / s" key switch (second from the left) to adjust the "zero adjustment" potentiometer so that the pointer points to zero.
(6) Warm up ten minutes, and repeat the above steps, before measurement.
(7) low wind speed section (0.05 ~ 1m / s) by warming up, calibration, the wind speed probe rod end of the heat-sensitive parts can be pulled out, so that it is exposed to the measured airflow, pay attention to make the measurement of the rod is vertical, and so that it has a top wire side of the direction of the direction of the airflow blowing (as shown in Figure 3) shows that can be read by the meter indicator value of the wind speed.
(8) high wind speed section (1m / s ~ 30m / s) (1m / s ~ 10m / s) wind speed of more than lm / s, press the "30m / s" "10m / s", straight key switch (third from the left) can be read. (At this time, all the keys are in the state of pressing).
(9) The use of the end should be straight key switch all keys from left to right in order to reset. Wind speed probe heat-sensitive parts of the rod pull-out part of all pressed into the rod tube, and dial down the plug into the original position of the instrument box.
(10) Battery installation.
Use the battery inside the machine, the installation must pay attention to the polarity can not be put wrong.
