"Brand shop No. 1" Xin Bao instrument tech MD7820 wood moisture measurement digital meter high | Инструменты

"Brand shop No. 1" Xin Bao instrument tech MD7820 wood moisture measurement digital meter high | Инструменты

Introduced:

MD7820Wood moisture tester Wood moisture meterDigital large screen liquid crystal display, which has the function of automatic compensation of environmental temperature, and the correction methods of the four tree species
Moisture test range:2%~40%,2%~50%
2%~60%,2%~70%
Resolving power0.5%
Temperature measurement range:-10~60 degree C (14~140 degrees F)
Accuracy:+ 2 degree C (+ 4 degrees F)
Resolving power1 degrees C (2 degrees F)
Automatic reading lock function
Automatic display low voltage sign
Power SupplyAA 4x1.5VBattery
Size: host:174x73x38mm
Probe:180x43x25mm

Moisture meter knowledge:

What is the moisture content of wood?

In our country, the weight of water content in wood and the percentage of dry weight of wood are defined as the moisture content of wood. Different species, different parts of large changes, such as water pine green rate of heartwood70%,The sapwood is200%. There are also differences in different kinds of producing area.

Wood moisture content should be reduced to the number of deep processing?

Wood in a certain environment, in a long enough time, the moisture content will tend to a balance value, known as the environment of the equilibrium moisture content. When the moisture content of the wood is higher than that of the environment, the wood will shrink, and the moisture will be expanded. When the wood moisture content is high, it will cause the plastic connection is not firm, after the processing deformation and so on. Different regions, different uses, the wood moisture content of the requirements are not the same. Natural moisture content of wood is generally in the7%~18%Therefore, this range can be regarded as the measurement and control standard for the production process of most wood products. In addition, the general can be empirically with wood measuring moisture meter if you think that meet the technical requirements of the moisture content of the wood to measure the moisture content, to check wood were measured to be can make a comparison and its moisture content is in accordance with the process requirement.

What is the moisture content of wood balance?

Wood in a certain state of air, the last to achieve the moisture absorption or desorption stable moisture content, called the balance of moisture content of wood (wood moisture stable state).

Water content measurement methods have several?

Method for measuring the moisture content of wood drying method, electrometric method, distillation method, titration method and humidity. Drying method and electrometric method commonly used in the production experiment. Drying method is the measurement of wood drying before and after drying (dry) moisture content difference to measure the moisture content of the method, this method is high precision, but time-consuming and cumbersome, generally applicable to the laboratory. Electrometric method is according to the rate of wood of some of the electrical characteristics and water, fast and convenient, accuracy than drying method, but can meet the requirements of the production process, suitable for large quantities of bamboo and wood products production etc. aspects

What are the differences in the results of different manufacturers, different types of water meter? Due to the different species, different temperature, different regions of wood has great influence on electric parameters of wood, and most pocket measuring instrument and can not be divided into different species and humidity correction file, so it can only to a certain tree species, humidity. Different instrument standards will inevitably lead to differences in measurement results.

When battery power is insufficient, have no effect on the test results?

When the battery voltage is less than the rated voltage70% ~ 80%When measured, the measured value will become smaller. As measured at rated voltage14%When the voltage is less than the rated voltage70%When detecting the same object, the reading may be11%Or smaller, and other low voltage symbols appear when the battery is not enough, at this time although the instrument can work, but the display is not accurate, the need to replace the new battery to ensure the accuracy of the measurement.