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Saturday, March 16, 2013

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Track the damage capacitors elco with ESR meter

All technicians must have the same experience that the old models of
aircraft generally have several common Elco its dry or down in value,
mainly found in many brands of china plane. Eco is dry can cause a
variety of disorders that are sometimes difficult to trace or even be
able to make certain parts do not work at all, especially if used on a
circuit that works at such high frequency SMPS (Switch Mode Power
Supply) and the horizontal. Elco dry technicians sometimes make
headaches and time consuming when you track the damage.

Many
technicians get around this problem by directly replacing all existing
Elko, the Elko-regardless of whether Elko is corrupt or not. It is
generally quite successful. But sometimes the quality is not good
substitutes Elko, so the damaged aircraft back after use for some time.
Replace all of Elko is also a problem for yourself if the circuit is
improved a lot using Elko. The use of ESR-meter proved to be the most
appropriate choice to solve the above problems. We suggest that
ESR-meter is a must-have tool for every technician after avo-meter.

Using ESR-meter we've made themselves at a cost of less than 50,000 rupiah we recorded a lot of advantages such as:

Elko track damaged by the time more quickly because they do not need to remove the Elko (in-circuit tester) one by one.
Elko only replaced damaged
Can be used to check the quality of new
and used Elko. It is certainly advantageous to utilize part of the
former ex-change machine pcb. Sometimes the plane is damaged due to
repeated just posted a new Elko was poor quality.
Elko that if the check using the
ohm-meter sometimes the results are deceptive. Because if you checked
with ESR ESR-meter turns his already large.
Can be used to check the flyback is
short in the primary coil (between the B with a pin-pin-collectors),
def a short yoke, the power tranfo a short primer.
To find out if re-chargeable batteries
are still good. Re-chargeable battery that is damaged ESR was generally
higher when compared to a still good.
To keep track of printed lines leaking / short
By comparing the capacitors are still good, ESR-meter can be used to check the value of thousands pf capacitor.

Note:

ESR meter can not be to find Elko leak or short. Fortunately rare short Elko damage.
ESR meter to check the fit only Elko with values ranging 0.47uF and above.

Does ESR it actually?
Parameters are generally owned by a Elko understood by engineers is the
"maximum working voltage" and "capacitance value". In the real case
there are several other parameters such as the "maximum working
temperature" (85 or 105 degrees C) and "ESR" (Equivalent Series
Resistance).
Unless the practice is capacitive in Elko also has the characteristics
of "resistive" caused by a combination of resistance to the legs,
internal connections, plates and electrolyte. Thus form a resistive
characteristic ESR, because if it is portrayed as if such be installed
in series with the capacitance of Elko.
Ideally, an Elko ESR is zero, but in practice this is impossible.
Elko High voltage tends to have larger ESR than the low voltage Elko
Elko with small values tend to have higher ESR values greater than
Elko.
Elko 105 degrees (C) tend to have higher ESR than Elko 85 degrees (C).

What Is the ESR-meter?

ESR meter is a kind of ohm-meter that can be used to measure the amount
of "resistance" of Elko. Difference if the ohm-meter using a dc current
(direct current) to drive the meter, then use the ESR meter ac
(alternating current) with a standard frequency 150Khz. As had been
explained that ideally Elko its ESR is zero. But this is not possible in
practice. Elko good quality 10uF value is close to zero or more
generally.

What is the cause of ESR Elko subject to change.

The first is caused because of the connection quality is poor constituents. It can be found in Elko Elko New and old.
Both are caused due to dry the liquid electrolyte due to evaporate
or leak, which can be found at the old Elko. Are the consequences of
large ESR Elko turned into?

Consequences of changing the value of ESR Elko

Elko is a working principle can be "in-fill and waste of" electric
charge repeatedly. Thus ESR Elko-charging current will be passed this
exile repeatedly in accordance with the working frequency of the
circuit. And we certainly have understood that if bypassed resistor will
generate heat flows in accordance with the magnitude of the current
strength through resistance value and the corresponding magnitude.
Similarly, the Elko with ESR, the greater the greater the ESR value of
the heat arising in Elko, and the higher the frequency the greater the
heat generated. This heat can eventually cause the electrolyte
evaporates into a gas and seeped out, so the value of Elko will turn
down. In the specific cases heat can even make Elko explode.
On a circuit that works at high frequencies Elko should have zero
resistance to the high frequency signal. If the ESR of the resistance
turned into Elko is no longer zero, and if the resistance value change
is large enough to make the workings of the chaotic circuit.

Our experience with the use of ESR meter in the aircraft repair older model (the old plane), the first one we always do is:

Check out all the Elko with ESR-meter at the SMPS, Horizontal and Vertical and immediately replace it if the ESR problem.
Check visually (with a magnifying glass if necessary) solder-solder
on the SMPS, the output Horizontal, Vertical output, and the CRT socket
pcb and soldering again if there appears a problem or suspicious solder
it.
Both of these were able to eliminate the difficulties that may arise
and difficult to trace, so the use of ESR meter can shorten repair
time.

How to use homemade ESR meter (calibration)

Once the tool is finished
Collect some old Elko is still good. Find Elko pcb traces of the
plane, made in Japan or Europe the original (former aircraft engine
change) because of generally good quality for use as a reference.
Grouped on the basis of a value less dar 2.2uF, 4.7uF is less than, less than and greater than 10uF 10uF.
Try using the ESR-meter to measure each group, and mark the position of the needle meter on each group
These markers can be used as a reference to the appointment of Elko ESR is still good.
If the meter needle to deviate less from the reference mark, the mean ESR Elko is not good.