Multimeter DT9205A problem

[matin]

Hello friends:
I've encountered a serious problem. I have a multi-meter model with the excel DT9205A. But for some time, I was measuring the ampere that I sparked because it was connected to the power of the city and how the multimeter connection was correct, but fuel. Iran has no repair facilities due to lack of facilities. So I got into trouble. I've noticed that the R16 and R17 are burnt. Someone has an electronic map of this device? thank you

 

[73's de Edd]

Sir matin . . . . .

Why certainly . . .

R14 will be a 9 ohm . . . . 0.5% tolerance
R15 will be a 90 ohm . . 0.5% tolerance
Possibly . . . if being in 10 AMP range . . . . R13 is being 0.99 ohms.

OR if HARD to find you might use an easier to find 10 ohm and trim to tolerance by
shunting with a selected higher value resistor across it for R14.
Same way with the 90 ohm in using a 100 ohm with its proper correcting shunt across it.
for R15.
And then . . .next time . . .initially observe your specific metering situation THREE times
and measure ONCE.

Your initially given resistor numbers are found in the Capacitance section..
I find R16 . . .900K and R17 . . .90K to be related to your Capacitance ranges and those
would take a HEFTY----HEFTY voltage level applied to them, to overload and affect them.





73's de Edd

 

[matin]

Sir matin . . . . .

Why certainly . . .

R14 will be a 9 ohm . . . . 0.5% tolerance
R15 will be a 90 ohm . . 0.5% tolerance
Possibly . . . if being in 10 AMP range . . . . R13 is being 0.99 ohms.

OR if HARD to find you might use an easier to find 10 ohm and trim to tolerance by
shunting with a selected higher value resistor across it for R14.
Same way with the 90 ohm in using a 100 ohm with its proper correcting shunt across it.
for R15.
And then . . .next time . . .initially observe your specific metering situation THREE times
and measure ONCE.

Your initially given resistor numbers are found in the Capacitance section..
I find R16 . . .900K and R17 . . .90K to be related to your Capacitance ranges and those
would take a HEFTY----HEFTY voltage level applied to them, to overload and affect them.



View attachment 39350

73's de Edd

thank you very much

 

[Hoatr]

Thank you very much. It is very helpfull to me!

 

[zizu]

Hi. I have problem with DT9205A. What,s the value R7?

 

[73's de Edd]

Sir zizu . . . . .


The instruments design has a series string of voltage divider resistors . . . . which I have marked up in GREEN . . . . with your R7 being at the bottom of the string for being the 200 MV range function .
Reference to the bottom left corner of the schematic . . . . . closed in Black / Yellow box.

According to my latest schematic. that would be a 100 ohm decimal 5 % tolerance, and judge the wattage by the physical sizing of the nearby R6 connected to it.

Next time " THIMK " ! ! ! ! so that you never end up with upwards of 1,000,000 millivolts being at your meter probes tip, whilst the range selector is set for but a mere 200mv.

SCHEMATIC . . . . . . . . .REALLY all marked up . . . .

https://i.ibb.co/3rBQTWQ/Combo-DT9205-and-A.png



73's de Edd . . . . .



FLASH ! . . . .

THIS LATEST INCOMING NEWS BULLETIN . . . just in . . .

The governor's mansion in ALABAMA burned down! Yep. Pert' near took out the whole trailer park.
The library was a total loss too.
Both books went . . . poof! . . . up in flames . . . . and he hadn't even finished coloring in one of them yet.

 

[bushtech]

Hmmmmm. Chinese draughtsman

 

[Bluejets]

Another drawing in the same zip(DT9205A cleaned up dot gif) shows R7 (green) non-existent and different numbering and value.
i.e. shows it in place of R9 (220K)

 

[Krishnan p]

Digital multimeter DT9205A shematic please. Q6 value please?

 

[Krishnan p]

Digital multimeter DT9205A shematic value and Q6 value please give me sir.

 

[Bluejets]

This video, apparently no semi is installed in that location.
0:54 in the video.

Appears to be several variations on the same model number for schematics.

 

[Krishnan p]

Thank you sir..

 

[rafael barros]

[QUOTE = "73's de Edd, publicación: 1758084, miembro: 41129"] Sir matin. . . . .

¿Por qué sin duda? . .

R14 será un 9 ohm. . . . 0.5% de tolerancia
R15 será de 90 ohmios. . 0.5% de tolerancia
Posiblemente . . . si está en el rango de 10 AMP. . . . R13 está siendo 0.99 ohmios.

O, si es DIFÍCIL de encontrarlo, puede usar 10 ohmios más fáciles de encontrar y recortar según tolerancia
derivación con una resistencia seleccionada de mayor valor a través de ella para R14.
De la misma manera con los 90 ohmios en el uso de 100 ohmios con su derivación correctora adecuada a través de ellos.
para R15.
Y entonces . . .la próxima vez . . .Inicialmente observe su situación de medición específica TRES veces
y medir UNA VEZ.

Los números de resistencia dados inicialmente se encuentran en la sección Capacitancia.
Encuentro R16. . .900K y R17. . .90K estará relacionado con sus rangos de capacitancia y aquellos
tomaría un HEFTY ---- nivel de voltaje HEFTY aplicado a ellos,

Sir matin . . . . .

Why certainly . . .

R14 will be a 9 ohm . . . . 0.5% tolerance
R15 will be a 90 ohm . . 0.5% tolerance
Possibly . . . if being in 10 AMP range . . . . R13 is being 0.99 ohms.

OR if HARD to find you might use an easier to find 10 ohm and trim to tolerance by
shunting with a selected higher value resistor across it for R14.
Same way with the 90 ohm in using a 100 ohm with its proper correcting shunt across it.
for R15.
And then . . .next time . . .initially observe your specific metering situation THREE times
and measure ONCE.

Your initially given resistor numbers are found in the Capacitance section..
I find R16 . . .900K and R17 . . .90K to be related to your Capacitance ranges and those
would take a HEFTY----HEFTY voltage level applied to them, to overload and affect them.



View attachment 39350

73's de Edd

amigo tengo una duda referente a mi multimetro que es el mismo modelo dt9205a pero marca hontek la resistencia R17 se me quemo pero no se logra ver cual es su valor me prodria indicar cual es para ver si logro repararlo estaria agradecido infinitamente por su ayuda!!

GOOGLE TRANSLATION:
Friend, I have a question regarding my multimeter, which is the same model dt9205a, but it marks hontek, the resistance R17 burned, but it is not possible to see what its value is.

Moderators note : Please keep all conversations in english.

 

[Harald Kapp]

@rafael barros : Rafael, esto es un forum en Ingles. Por favor use Ingles en tus aportes.
Most users here will have a hard time understanding a post in Spanish.

 

[73's de Edd]

FIO . . . .
The first portion was just being a Spanish translation of my earlier post #22.
The second is querying the value of a blowed-ed-ed up R17.

Ola Sr Rafael . . . . . ¿ Que P a a a a a a a a a a a a a a a a a a a a a sssa ? . . .a la Budweiser.

Para estar seguros, ¿qué tal una fotografía de R17 y las 12 partes más o menos a su alrededor.
Un esquema es que es una resistencia de escala de rango de 10 ohmios que estaría asociada
con el rango de prueba de condensador de 200 mfd. ¿Alguna posibilidad de que accidentalmente
estuviera en ese rango mientras se probaba un alto voltaje?
No hay mas. . . .
Setenta y tres de edd. . . . . . .un tejano. . . que parece que puede hablar tres o mas palabras en espanol.

GOOGLE TRANSLATION:
TRUST . . . .
The first portion was just being a Spanish translation of my earlier post # 22.
The second is querying the value of a blowed-ed-ed up R17.

Hello Mr. Rafael. . . . . What P a a a a a a a a a a a a a a a a a a a a sssa? . . .to the Budweiser.

To be sure, how about a photograph of R17 and the 12 or so parts around it.
One scheme is that it is a 10 ohm range scale resistor that would be associated
with the capacitor test range of 200 mfd. Any chance that you accidentally
was in that range while testing a high voltage?
There's no more. . . .
Seventy-three edd. . . . . . .a Texan. . . It seems that he can speak three or more words in Spanish.

Moderators note : Please keep all conversations in English

 

[rafael barros]

hola pues lo extraño es que creo que estaba midiendo voltaje alterno lo que no recuerdo es si lo tenia en escala de 200 ohmns de capacitancia pero lo mas extraño aun es que en capacitancia me mide pero en resistencia no, ni el voltaje alterno ni continuo dan valores extraños y si mido alterno de la casa de 110 me da lectura de 1, voy a tratar de enviarte unas fotos de la placa donde se daño la resistencia

GOOGLE TRANSLATION:
hello well the strange thing is that I think I was measuring alternating voltage what I do not remember is if I had it on a scale of 200 ohms of capacitance but the strangest thing is that in capacitance it measures me but not in resistance, neither the alternating nor continuous voltage give strange values and if I measure alternate from the house of 110 it gives me a reading of 1, I will try to send you some photos of the plate where the resistance was damaged

Moderators note : Please keep all conversations in English

 

[73's de Edd]

Ahora . . . . El dice . . . . ( Now . . . .he says . . .)

Howdy Horn Honkers . . .

Well the strangest thing is that I ¿ think ? that I was measuring AC voltage .But, what I do not remember, is if I then had it on its 200 ufds capacitance range..
But the strangest thing is, that in capacitance it measures for me but not when put in in resistance range, neither the alternating nor continuous voltage give strange values and if I measure AC from the 110 house voltage, it gives me a reading of 1.

I will try to send you some photos of the circuit board where the resistor was damaged.

 

[rafael barros]

como hago para enviar la imagen me da un error al intentar adjuntar

GOOGLE TRANSLATION:
How do I send the image gives me an error when trying to attach

Moderators note : Please keep all conversations in English

 

[rafael barros]

alli se muestra cual es la resistencia quemada que necesito saber su valor para ver si puedo sustituirla y reparar mi multimetro!! gracias a quien me pueda colaborar con sus conocimientos!!

GOOGLE TRANSLATION:
there it is shown what is the burned resistance that I need to know its value to see if I can replace it and repair my multimeter !! Thanks to whoever can help me with their knowledge!

Moderators note : Please keep all conversations in English

 

[Harald Kapp]

@rafael barros : Rafael, please use English or you risk being banned.