Tweet
I have tested this bridge and I do get reading where it should be reading and I have open circuit where it should be open. The question I have is: I have seen on YouTube and read around that readings should be between 400 and 600. My readings are all much higher like 1871.. I bought a new Bridge and got the same readings!!!!??? SO are high readings OK? Or my DMM is bad, but I don't think it is, it works OK with single diodes, resistors and other functions..
-
-
What are the units? mV?
What's the part/model number of the bridge?
Can you put new batteries in your meter to see if the readings change?
- any/all of these will help determine the right answers to your questions.
If it still won't get loud enough, it's probably broken. - Steve Conner
If the thing works, stop fixing it. - Enzo
We need more chaos in music, in art... I'm here to make it. - Justin Thomas
MANY things in human experience can be easily differentiated, yet *impossible* to express as a measurement. - Juan Fahey
-
Make sure your meter is in diode test mode as you won't get a sensible reading with anything else. If your meter works fine with a single diode then it should work with a bridge as you're just testing 4 individual diodes. You should get a reading of about 0.6v for each diode in the forward direction.Comment
-
The name/ model is in the thread name D25XB60, DMM is set for diode checking - continuity mode. Will try new battery..Comment
-
If you bought another new bridge and it reads the same, then the bridge is probably ok.
So just a question about your meter, or whether it is some odd type of bridge.Originally posted by Enzo
Comment
-
I tried with the fresh battery, the readings are the same... And btw if DMM is set for continuity (diode test) aren't the units Ohms? Why are people saying mV?Comment
-
Here is datasheet if anybody can figure out
Comment
-
So the fwd voltage drop from the sheet is typically 0.7vdc, what we expect from one diode drop. If you are measuring across two diodes (from + to -, for example, or ~ to ~) you'd probably read 1.3..1.6vdc, that might explain what you see?
To check each diode individually, you'll want 4 separate diode readings (eight measurements total), so from + to ~, for example, and then reverse the leads and repeat. Then from + to the other ~ terminal, and so on. 4 of the readings should be infinity, represented by OL or a very large number, and 4 should be the diode drop of .7vdc as expected.If it still won't get loud enough, it's probably broken. - Steve Conner
If the thing works, stop fixing it. - Enzo
We need more chaos in music, in art... I'm here to make it. - Justin Thomas
MANY things in human experience can be easily differentiated, yet *impossible* to express as a measurement. - Juan Fahey
Comment
-
No, in diode test the reading is not in ohms. In diode test the reading is voltage drop across the junction. The reading is in volts. For a diode, typically 0.4v to 1v.Education is what you're left with after you have forgotten what you have learned.Comment
-
Yes, I have been measuring correctly it's just that my readings are high, I am getting a new DMM tomorrow, even on a single diode it's giving readings over 1800's I never paid attention.. I suspect cheap DMM, I will know more tomorrow. Thanks :-)Originally posted by eschertron View PostComment
-
Duly noted, thank you :-) I am getting a new DMM tomorrow, this one is showing readings in 1800's even for any random diode i take of the table..Originally posted by Enzo View PostComment
-
So if it measures the same as other diodes, and a new one also measures same, it should be ok.
Meantime, what is the unit you are trying to fix and what is the fault?
Originally posted by Enzo
Comment
-
Got new DMM everything perfect, sorry for the confusion, trowing away old DMM in the garbageComment
-
I'm working on the switching power supply from Behringer PMP5000 but I have a separate thread on that here you go https://music-electronics-forum.com/...ad.php?t=49735Originally posted by g1 View PostSo if it measures the same as other diodes, and a new one also measures same, it should be ok.
Meantime, what is the unit you are trying to fix and what is the fault?Comment
Comment