Comments on: Review of the DY294 Digital Transistor Tester-Part 2

By: Jestine Yong

Jestine Yong — Thu, 11 May 2017 01:13:25 +0000

In reply to Jonas.

Hi Jonas,

Thanks for pointing it out.

Jestine

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By: Jonas

Jonas — Wed, 10 May 2017 09:32:16 +0000

One correction, it is not 471V 🙂
It is 470V
As a capacitor with 104 written on it is 100000pF and not 104pF.
No big deal, I just want to point it out so that nobody thinks 470 means 470V, That would be 47V. Last digit is the number of zeroes.
Thanks for a good review.

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By: Juan

Juan — Tue, 24 Apr 2012 06:22:54 +0000

Hi! Thanks Jestine!
The batteries were new when I did the tests. Right now the batteries only show 5.9V total. I have ordered a power adaptor for it so I am waiting for the adaptor.
It is still a very good tester because it does a lot of tests that are not done by other meters. Only zener diodes below 5V don't read correct but I can test those small voltage diodes with the 9V power supply and resistor circuit. It works good.
Juan

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By: Jestine Yong

Jestine Yong — Thu, 19 Apr 2012 14:28:40 +0000

In reply to Juan.

HI Juan,

This tester consume lots of batteries power. Make sure you have new batteries before you test it. Try test few more different type of zener diode voltage and see the result. From my own testing it seems that there is some tolerance in testing zener diode but in your case it seems to be out a lot.

Jestine

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By: Juan

Juan — Sun, 15 Apr 2012 08:36:59 +0000

I received my tester yesterday, DY294. Everything seem to work good as you show in your reviews.
The only little problem I am having with it is when I test the breakdown voltage of zener diode which is 3.3V, the tester only show 1.7V. I know the zener diode is good because it is new and I test it with other meters.
The breakdown voltage of zener diode rated at 5.1V and higher are showing good readings.
I don't know if there is something I don't understand because on page 9 of the manual it says that a range can be used to test zener diode of less than 5V. I don't know which range exactly.

Juan

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By: admin

admin — Fri, 20 Jan 2012 06:50:37 +0000

Hi Rad,

I have just checked my meter according to your setting and it was the same result. This means your meter is good.

Jestine

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By: Rad

Rad — Thu, 19 Jan 2012 10:15:22 +0000

Hi Jestine, I bought the DY294 TESTER and first tried to test the voltage coming out 0n the 1000 scale, when i press test botton it read 1562v on it own display without my DMM connected. When i connect my tester to ( C & E ) the volt reads 1184. Also on the 200 scale when i press test button the dy294 screen shows the volts increasing then display "1" on my DMM it shows 247v, is it normal for the dy294 to show the volts increase then display "1" only on 200 scale?

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By: gozie

gozie — Wed, 17 Aug 2011 23:18:12 +0000

its very educative informative

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By: admin

admin — Sun, 06 Jun 2010 20:47:42 +0000

HI Siebo,

I can't 100% confirm that but it still a good meter

Jestine

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By: siebo

siebo — Sun, 06 Jun 2010 07:34:31 +0000

interesting meter. i am thinking of buying one.
i wonder if this meter also can detect, component breakdown when under full load? If so , it's very interesting meter

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