7.11. Device of heating from rear glass

       PREVENTION
     Fig. 7.76. Check of an entirety of engineers of an element of heating from rear glass: 1 – tries of voltômetro; 2 – pressing direction in a finger; 3 – metal leaf; 4 – way of an element of heating
Not to damage a way of an element of heating checking, roll a metal leaf up in hints of probes of the voltômetro. For começam working the existence of the interval they hold tight a metal leaf a finger and execute it in all the ways of an element of heating (fig. 7.76).

Check of technical condition

Fig. 7.77. Scheme of check of resistance of ways of an element of heating from rear glass

The switch includes the heating from rear glass and check the tension in each way in the point located in the middle of the glass (fig. 7.77). If the tension in the voltômetro does approximately 6 V, the way of an element of heating can be considered a usefulness.
 Fig. 7.78. The determination of the position of a point of the interval of a way of an element of heating from rear glass in the indication of the voltômetro of 12 V (the point of the interval is observed by a cross)

If the way is pulled out between the central point and a conclusion "+" (fig. 7.78) in the environment, the voltômetro will show the tension of the 12th century.
Fig. 7.79. The determination of the position of a point of the interval of a way of an element of heating from rear glass in the indication of the equal voltômetro to the zero (the point of the interval is observed by a cross)

If the interval of a way happened between the central point and a conclusion in the environment "-" (fig. 7.79), the voltômetro will show the equal tension to the zero.
Since the inquiry of the right place of the interval slowly moves the probe of voltômetro for a way for the pretense place of the interval. Find a point where the tension appears or reduces to the zero. The point in which the tension is modified is a point of the interval of a chain.
Check a resistance ohmmeter of each way of an element of heating between one of conclusions and a middle point of a way and between the same conclusion and a middle point of the next way. The resistance of section in which there was an interval will be twice more than the resistance of another section. Move the prover's probe for the section with a slit to a point in which the resistance agudamente is modified.

 Elimination of engineers' interval of an element of heating
With this finality you will have to: driving painting, more fine than painting, an insulating tape, a remover of silicon.
Through a fine brush they rub the surface from glass around the considered places of the interval of a way, compensate for this surface a remover of the silicon and glue two parts of an insulating tape along the damaged engineer of two sides of the place of the interval so that the parts of a strip were not imposed to the thread of an engineer.
Strongly lift the container with the painting driving and a brush put it at the place of the interval in three layers with a nearby interval
15 minutes (the glued parts of an insulating tape serve of a standard that supplies the drawing of a coat of painting of the width, comparable with a width of a way of an element of heating).
Withdraw an insulating tape.
Before including the glass heating, we are going to paint the dry sufficient time (the time of the drying is specified in the packing with the painting).
For the improvement of the appearance of a way of current transport after the drying full of painting (in 24 h) exactly they withdraw with an excess of knife of painting.