Control
Temperature and dampness test chambers incorporate consistent test chamber and exchanging test chamber.The normal high and low temperature test chamber for the most part alludes to the steady high and low temperature test chamber. Its control mode is: set an objective temperature
The examination chamber can consequently settle the temperature to the objective temperature point. The control method of the consistent temperature and dampness test chamber is additionally comparable. Set an objective temperature and mugginess point. The test chamber can naturally balance out the temperature to the objective temperature and moistness point. The high and low temperature rotating test chamber has a program for setting at least one high and low temperature changes and cycles.
The test chamber can finish the test cycle as indicated by the preset bend, and can precisely control the temperature increase and drop rate inside the scope of the most extreme temperature climb and drop rate, or at least, the temperature increase and drop rate can be controlled by the incline of the set bend. Additionally, the high and low temperature rotating sodden intensity test chamber likewise can preset the temperature and mugginess bends and control them as per the presets.
Obviously, the exchanging test chamber has the capability of a consistent test chamber, yet the assembling cost of the substituting test chamber is moderately high. Since the substituting test chamber should be furnished with a programmed bend keep gadget and a program regulator in the west, and the issue of beginning the fridge when the temperature in the chamber is high should be settled. In this manner, the cost of the exchanging test chamber is by and large over 20% higher than that of the steady test chamber. Subsequently, we ought to be reasonable and step through the necessities of examination techniques as the beginning stage, and pick a consistent test chamber or an exchanging test chamber.
Temperature Change Rate
Conventional high and low temperature test chambers have no record of cooling rate, and the time from encompassing temperature to ostensible least temperature is for the most part
90~120 min. The high and low temperature exchanging test chamber and the high and low temperature rotating clammy intensity test chamber all have the prerequisites for temperature change speed, which by and large requires 1 ℃/min, and the speed can be changed inside this speed range. The temperature change pace of the quick temperature change test chamber is quick. The pace of temperature climb and drop can arrive at 3 ℃/min~15 ℃/min, and the pace of temperature endlessly climb could arrive at more than 30 ℃/min in some temperature segments
The temperature scope of quick temperature change test offices of different details and paces is by and large the very, or at least, – 60~+130 ℃, however the temperature range for evaluating the cooling speed is unique. As indicated by various test prerequisites, a portion of the temperature scopes of quick temperature change test chambers are – 55~ +80 ℃, while others are 40~+80 ℃.
There are two methods for portraying the temperature change pace of the quick temperature change test chamber, one is the typical temperature climb and fall speed in the entire cycle, and the other is the direct temperature increase and fall speed (really the normal speed each 5 min). The general typical speed alludes to the proportion of the distinction between the most noteworthy temperature and the least temperature and the time inside the temperature scope of the test chamber.
As of now, the specialized boundaries of temperature change rate given by unfamiliar ecological test hardware producers allude to the typical pace of the entire cycle. Straight temperature climb and fall speed alludes to the temperature change speed that can be ensured at regular intervals. As a matter of fact, for the quick temperature change test chamber, the most troublesome and basic part to guarantee the direct temperature climb and fall speed is the cooling rate that the test chamber can arrive at inside the last 5 min of the cooling segment.
According to a specific perspective, the direct temperature increase and fall speed (normal speed each 5 min) is more logical. Thusly, it is better for the test hardware to have two boundaries: the typical temperature climb and fall speed in the entire cycle and the straight temperature increase and fall speed (normal speed each 5min). The direct temperature, as a rule, rise and fall speed (normal speed each 5 min) is 1/2 of the general typical temperature increase and fall speed.
Wind Speed
As per applicable norms, the breeze speed in the temperature and dampness chamber will be under 1.7m/s during the natural test. For the actual test, the more modest the breeze speed, the better. Assuming the breeze speed is excessively high, it will speed up the intensity trade between the outer layer of the test piece and the stream in the chamber, which is unfavorable to the credibility of the test. In any case, to guarantee the consistency in the office of the test chamber, it is important to have flowing air in the test chamber. In any case, for the fast temperature change test chamber and the temperature, dampness, vibration and other multifaceted exhaustive natural test chamber, to seek after the temperature change rate, the stream pace of the coursing air in the chamber should be sped up, and the breeze speed is generally 2~3 m/s. Subsequently, the breeze speed limit is different for various purposes.
Temperature variance
Temperature variance is a somewhat simple boundary to understand. Most test chambers created by all ecological test gear producers are actuallyThe temperature change can be controlled inside ± 0.3 ℃.
Consistency of temperature field
To all the more precisely recreate the genuine ecological states of items in the nature, it is important to guarantee that the
The environmental elements are in a similar temperature climate.
In this way, setting the test temperature angle and temperature variance that fulfill the guideline is vital.
Stickiness control
The stickiness in the ecological test chamber is generally estimated by the wet and dry bulb technique. The assembling standard of natural test gear expects that the mugginess deviation will be ± 23% RH. To meet the prerequisites of mugginess control exactness, the temperature control precision of stickiness test chamber is high, and the temperature change is by and large not exactly ± 0.2 ℃. In any case, it is hard to meet the necessities of dampness control precision.
Cooling
In the event that the test chamber is furnished with a refrigeration framework, the refrigeration framework should be cooled. The test chamber has two sorts of air cooling and water cooling.
