Temperature and temperature control instructions of the rapid temperature change test chamber

Many users do not know how to choose when purchasing a rapid temperature change test chamber, in fact, the rapid temperature change test chamber needs to pay attention to the temperature and temperature control instructions in operation, and better choose the rapid temperature change test chamber
.
The selection of the humidity range of the rapid temperature change test chamber needs to be noted that the corresponding temperature range should be indicated after the humidity index, or the dew point temperature
should be given.
Because relative humidity is directly related to temperature, for the same moisture content, the higher the temperature, the smaller
the relative humidity.
The rapid temperature change test chamber achieves high temperature and high humidity, and only needs to spray water vapor or atomized water droplets into the box air for humidification
.
Low temperature and low humidity is relatively difficult to control, because the moisture content at this time is very low, sometimes much lower than the moisture content in the atmosphere, and it is necessary to dehumidify the air flowing in the box to make the air dry
.
The ordinary rapid temperature change test chamber generally refers to the constant rapid temperature change test chamber, which is controlled by: setting a target temperature, and the test chamber has the ability
to automatically constant temperature to the target temperature point.
The control mode of constant temperature and humidity test chamber is also similar, setting a target temperature, humidity point, the test chamber has the ability
to automatically constant temperature to the target temperature and humidity point.
High and low temperature alternating test chamber has to set one or more high and low temperature changes, circulation procedures, the test chamber has the ability to complete the test process according to the preset curve, and can be in the range of heating and cooling rate capability, control the rate of heating and cooling, that is, according to the slope of the set curve to control the heating and cooling rate
.
Similarly, the high and low temperature alternating humidity and heat test chamber also has a preset temperature and humidity curve, and the ability to
control according to the preset.
Of course, the alternating test chamber has the function of a constant test chamber, but the manufacturing cost of the alternating test chamber is higher, because the alternating test chamber needs to be equipped with a curve automatic recording device, a program controller, and it is also necessary to solve the problems of the test chamber to open the refrigeration machine in the case of high temperature in the working room, therefore, the price of the alternating test chamber is generally more than
20% higher than the price of the constant test box.
Therefore, we should realistically take the needs of the test method as the starting point and choose a constant test chamber or an alternating test chamber
.