How to check the quality of the heating tube, how to measure the quality of the heating tube

There are two ways to measure the quality of the heating pipe:

1. Multimeter.

The x1 resistance file measures the two terminal heads, and the resistance value should generally be within hundreds of ohms, with the influence of its working voltage and power, there is a difference but not much;

2. Measure the resistance between any terminal pile head and the shell with a resistance level of x10k or above, which should be infinite; After use, due to moisture and other reasons, the heating wire and the shell are used to shake the meter.

It may be measured that there is a certain resistance value, but the resistance value should be above 40m, otherwise there is a problem with safety.

Classification: 1. According to the classification of the outgoing method, it can be divided into single-head electric heating pipe and double-head electric heating pipe.

2. According to the classification of materials, it can be divided into stainless steel electric heating pipes, quartz electric heating pipes, Teflon electric heating pipes, and titanium electric heating pipes.

3. According to the classification of appearance, it can be divided into straight electric heating pipe, U-shaped electric heating pipe, L-type electric heating pipe, W-type electric heating pipe, fin electric heating pipe, and special-shaped electric heating pipe.

4. According to the classification of use, it can be divided into dry burning electric heating pipe and water burning electric heating pipe.

5. According to the classification of heating methods, it can be divided into conventional resistance heating pipes and radiant electric heating pipes.

Cause. 1. The ground wire is not connected;

2. The insulation of the electric heating pipe is damaged (this may be the problem of insulating magnesium oxide powder, or the insulation of the joint);

3. The electric heating tube is burned out and the cup body is short-circuited;

4. Improper cleaning, water touching the binding post of the stainless steel electric heating pipe;

5. The circuit wire falls off and collides with the cup;

6. There is too much dirt in the electric socket or power plug;

7. The water quality is too poor, and the water pollution is serious;

Resolution. 1. Connect the ground wire as required and check whether it is correct;

2. If there is still such an event in the inspection and repair, it is recommended to replace it;

3. The electric heating pipe has been damaged and replaced with the electric heating pipe of the same specification;

4. Clean and dry the stainless steel heating pipe correctly;

5. Check the detached wire and re-weld it;

6. Clean and dry correctly;

Use a multimeter ohmic file or shake meter to test whether the power cord of the heating tube is open and has resistance, if it is not passed, it is bad, but there is no resistance, it is also bad (there is a short circuit inside). If there is resistance, then measure whether the power cord and the outer tube (metal shell) are connected or have resistance, and it is good to not be able (resistance infinity).

Use a multimeter to measure whether the heating element is broken, or directly power on to see if it can be heated. Also test whether the insulation between the power cord and the shell is good.

Here's how to measure the quality of a heating tube:Tools: multimeter, heating tube, pen.

1. Open the multimeter to the resistance level.

2. Use two table pens to measure the positive and negative ends of the heating tube.

3. The multimeter shows that the field argument is three Huai Spine friends zero, which is normal.

4. There is no reaction, and the heating tube is damaged.

5. Measure whether a terminal is on with the outer wall of the heating tube.

6. If the conduction is damaged, that is, it is grounded, there is no reaction, and the heating tube is normal.

Here's how to measure the quality of a heating tube:1. Stainless steel 304 for normal water heating

Weak acid and weak alkaline liquids are made of stainless steel 316L, and Teflon is used for strong acids and alkalis.

Coating material. 2. Oil heating can be made of stainless steel 304 or iron.

3. The resistance of the two outgoing wires should be 220V, 1000W about 48 ohms, 1500W about 32 ohms, and so on.

4. The (insulation) resistance of any outlet wire and the shell is more than a few trillion ohms, and it is good for anyone who can pass the above two steps to measure.

5. Air heating is special, and different materials are selected according to different temperatures.

Under normal circumstances, the resistance file can be measured with a multimeter, if it is passed, it means that it is good, the resistance will not be too large, depending on the power of the electric heating pipe, the shell should not be measured with the highest grade, if the shell is passed, then it is leakage and can not be used.

Cause. 1. The ground wire is not connected;

2. The insulation of the electric heating pipe is damaged (this may be the problem of insulating magnesium oxide powder, or the insulation of the joint);

3. The electric heating tube is burned out and the cup body is short-circuited;

4. Improper cleaning, water touching the binding post of the stainless steel electric heating pipe;

5. The circuit wire falls off and collides with the cup;

6. There is too much dirt in the electric socket or power plug;

7. The water quality is too poor, and the water pollution is serious;

Resolution. 1. Connect the ground wire as required and check whether it is correct;

2. If there is still such an event in the inspection and repair, it is recommended to replace it;

3. The electric heating pipe has been damaged and replaced with the electric heating pipe of the same specification;

4. Clean and dry the stainless steel heating pipe correctly;

5. Check the off-imitation balance and drop the wire, and re-weld it;

6. Clean and dry correctly;