Shake meter to detect electric tubular heating element leakage
Today,Suwaie company's tubular heating element manufacturers will tell you how to correctly use the shake meter to detect the leakage of the electric tubular heating element, so as to solve the problem in a targeted manner:
Megohm-level resistance meters used for testing various electrical equipment include digital multimeters and pointer multimeters. Here we introduce the use of another resistance meter, namely the shaking meter, to detect the electric tubular heating element. When using a shaker to detect an electric tubular heating element, we are used to connecting the shaker to the heating tube terminal and the heating tube shell, so that the result can be detected.
Before using the shaker, the shaker should be kept in a horizontal position, and the wiring must be correct (the shaker has three terminals L, E, and G. The L end is connected to the bare conductor of the loop, when measuring the resistance of the loop to ground; the E end is connected to ground When the insulation resistance of the circuit is measured by measuring the insulation resistance of the circuit with the wire or metal shell, the first end and the end of the circuit are connected to L and E. To prevent the appearance of the cable from affecting the measurement accuracy, the shielding layer of the cable should be measured. (Connect to terminal G) Hold the watch body with your left hand and shake the watch handle with your right hand. The speed should be about 120r / min. The pointer should point to infinity (∞) as normal, otherwise it indicates that the electric heating tube is malfunctioning.
Therefore, it is important to remember that the electric tubular heating element must not be connected at random during leakage detection. When testing, do not touch the binding post and measured circuit of the shaker by hand, and finally. To prevent electric shock; short-circuit between the terminals after shaking the meter to avoid damage, the time should not be too long.
Electric tubular heating elements are generally divided into civil tubular heating element and industrial tubular heating elements, and industrial tubular heating elements are often non-standard products, and the structure is also various. The design of the structure is often convenient for the installation or aesthetics of the heating equipment, so the design There are also many things that we should pay attention to when it comes to electric heating tube structure.
1. The design of the tubular heating element should take into account the effects of thermal expansion and contraction, ablation, oxidation, creep, etc., to avoid failure due to deformation during normal operation.
2. The design of the internal structure of the tubular heating element should ensure that the highest temperature of the material used for manufacturing the tubular heating element or the highest temperature that may be encountered in its processing will not be damaged, and it can still work reliably.
3. The design of the welding structure of the electric tubular heating element should meet the relevant standards. The welding seam of the piezoelectric heating tube, especially the part inside the container, should be as few as possible. The setting of the welding seam should be easy to check.
4. The design of the pressure-bearing tubular heating element shell and its accessories must meet the relevant standards. The electric tubular heating element (including the end) must be sealed.
