Chlorophyll is actually a kind of green pigment and a very important source of life. Without chlorophyll, there would be no green world of ours. So where does chlorophyll exist? Chlorophyll exists in the leaf cells of green plants, which contain a kind of chloroplast. In the past, if you want to measure the chlorophyll content in plant leaves, you need to take samples and send them back to the laboratory for testing, which usually takes several days to get the results. Now, with the chlorophyll meter, you can measure it anytime and anywhere, and the efficiency has increased several times.
What should we pay attention to when using the instrument? The editor will briefly talk to everyone here. When the instrument is used directly under the sun, you should block the sunlight with your body so that the measurement results will not be affected. Do not try to measure absolutely thick parts, such as veins. If there are many veins in the measured leaf, the best way is to take multiple measurements and get the level value. If a series of "beeps" and "-- -" flashes appear on the current screen, it is an error in the sample editing of the measurement step, the sample is not completely sealed, the sample is not included and opened before the measurement is completed, or the sample is too thick or too thick small.
If there are some abnormal phenomena when the instrument is in use, the reason should be judged according to the actual situation. If the decimal point flickers, the decimal point or the measured value is greater than 50, the measurement accuracy cannot be guaranteed. If the transmitting or receiving window of the sample holder is dirty or there is water, it will affect the measurement result, so the measurement window should be cleaned before measurement.
Slewing Controller is a kind of Tower Crane slewing control device, combined speed and voltage regulation and eddy current speed controling. The slewing control block control the speed of eddy current torque motor, to make the tower crane slewing mechanism start, working and stop smoothly. This kind of Slewing Controller is used to regulate and control the speed of three-phase torque motor of AC 50Hz, voltage 380V.
HRCV slewing controller is a hoisting slewing controller developed by our company according to service condition of customer.
The main technical feature as follows:
(1) This product combined the controller and thyristor module,the connection of the users is simple and easy.Prevent the damage of the controller and thyristor module caused by mis-wiring of the customer.
(2) Realize the best optimization of AC voltage control curve and DC voltage control curve.
(3) With the function of inching during operation, realize the accuracy.
(4) The electronic components adopt the imported industrial grade chip, on the control panel directly with power supply and direction indicator light.
(5) Adopt the coating treatment on the printed circuit board,enhance the dust prevention and anti-condensation capacity of the circuit board.
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