Step-by-step constant wet test box maintenance programme
Source: sky test equipment co. Ltd., dong chong
Step-by-step constant wet test box maintenance programme
What are the maintenance options for the main walk-in hot and wet test boxes? And here's what we're going to make up for you, and we're going to make it clear to you that we're going to get to work on the constant temperature and humidity test box。
Step-by-step constant wet test box maintenance programme
Option 1: cross-reference
This can be done by allowing the appearances and the normal appearances to operate in the same condition, and then looking at the signals of some points against the two sets of signals measured, which, if different, can determine the faults. This approach requires appropriate common sense and technology on the part of the repair personnel。
The demand is for two of the same types of appearance, and one is functional. Such an approach would also require the necessary equipment, such as universal meters, oscillators, etc. By nature of comparison, electro-voltage, wave-form comparison, static resistance, output comparison, current comparison, etc。
Method ii: program for maintenance of the constant temperature and wet test box by means of the electrical sideways
When an electrical circuit has a eccentric appearance, such as a display disorder, there are some circuits that can be determined by the approximation method。
Method iii: separation
Dissociation does not require a comparison of the same type of equipment or spare parts and is safe and reliable. Flowcharts based on faults, cutting around gradually reducing the range of faults, together with signal matching, parts exchange, etc., usually lead to the location of the problem quickly。
Option four: the knock method
There are often signs of good and bad functioning of instruments, most of which are caused by touching or welding. In this case, it is possible to opt for knock and hand pressure。
The so-called “knocking” is the stinging of the plugboard or component through a little rubber head or some other knocker to see if it causes error or shutdown. The so-called “hand pressure” is the hand-pressure of the parts and plugs and seat-to-head when the problem is presented, when the power is turned off, and then try to get rid of it. If a blow is found to be normal, then a blow is not normal, then everything will be put back into the cage and then another solution will have to be found。
Option v: status adjustment step-by-step programme for the maintenance of the heating and wet test box
Usually, this is particularly true for the monetary equipment in the circuits, especially adjustable devices, etc., until the problem has been determined. However, if paperless recorders are preceded by a reference system (e. G., location marking or electro-voltage or resistance detection, etc.) they are still allowed to be carried out if necessary. Perhaps the change will sometimes eliminate the problem。
Ic power supply and ground-end; investigation of the effects on the symptoms of the problem on transistor circuits that are transected at the input end of the base pole or at the output end of the total electrodes. If the side entrance end of the colourless paperless recorder is invalid and its output end appears to be missing, then the problem is determined to be present in the circuit。
Option 6: investigation law
Use vision, smell, touch. At certain times, the damaged elements change colour, bubbles or charred cords; the burned equipment has special scents; short-circuit chips are hot; welding or welding can be investigated with the naked eye。
Option seven: shoulder riding
The shoulder riding method is also known as the convergence act. Placing a good ic chip on a chip to see, perhaps linking a good meta-mechanical device (electric resistance, diodes, triodes, etc.) with a meta-mechanical device to look at, holding on to a remarkable touch, an approach that can be removed if the problem arises from reasons such as roading or touching inside the device。
Option viii: replacement method
1) replacement of components: the requirement is for two instruments of the same type or for spare parts to be met. A good spare is replaced with the same dollar device on the bug machine to see if the problem is eliminated。
2) functional replacement method: when the functional loss of a part of the defective machine is due to the fact that the original spare parts could not be located at the moment, they could be replaced by the same or nearby components of the same or home-made electrical parameters, based on the electrical principle of the department, and could equally reach the intention of repairing the instrument。
Option nine: temperature rise
In some cases, defects occur at longer external operations or at higher temperatures in the summer operating environment, when the machine is shut down, when it is stopped for a while, and when it is turned on, it is normal. This appearance is due to the poor functioning of individual ics or metallurgical devices and the failure of high temperature characteristic parameters to meet the target demand. In order to identify the cause of the problem, the metallic processing net is optional。
The so-called cooling is that, when the problem is present, the use of cotton fibres will wipe it down in parts that may have a problem and investigate whether the problem is eliminated. The so-called warming is an artificial increase in ambient temperature, as in the case of electric branding, which places it close to suspected parts (care that the temperature cannot be raised too high to damage normal equipment)。
Option 10: cleaning
