Very nice video. The PC software could be very useful for the testing I perform. A little surprised that Peak appear to have left flux residue around the input connections and the display connector. I purchased a cheap Component tester from China. The first one that arrived did not work, but the seller immediately sent another. It works(ish) but doesn't give much confidence with the test results. Some tests give strange results with known good devices. I will be purchasing the Peak DCA.
Bob Fuller I did notice the flux residue, but it's likely to be a no clean flux so shouldn't cause any issues. This device seems to work great though, so I wouldn't hesitate to recommend it.
If I understand correctly, this DCA75 DOESN'T tell you if a semiconductor is Good or Bad. It gives you the operating parameters and identifies the DUT then you have to compare against the manufacturer's specifications to see if the semiconductor is operating correctly. I suppose another way to find out is to look at the curve traces and look for any distortion. Is there a book of semiconductor specifications? In the "old days", there used to be booklets by RCA and GE with all the vacuum tube (valve) specifications. Is there a similar type book for semiconductors?
+Mystery47 No there's not really any databooks (there used to be before the internet) due to the huge number of devices available. If you want to know exactly the parameters then the datasheet is about your only choice, however, you quickly get to know the types of numbers to expect for a given family of components. It's quite rare for a semiconductor to 'fail a bit', so the numbers will be way out or it'll detect the wrong type of device if something is wrong.
It WILL tell you if you have a gross fault however. If any two leads go open or short, you get a failure notice. Other indicators of failure are "way out there" parameters, leakage (should read 0 for Si devices) or the wrong device being detected, though in the case of the latter, be sure to check the connections before discarding the DUT. Note that it cannot test beyond 10V or so and a few mA so you sometimes can still miss a bad device if it fails under higher load.
error shows NO Component when connected to L7912CV If I try to connect 2 wires only on any pins it detects it as zener diode. No response from manufacturer either.
Quality parts, high quality SMD assembly but the joints for the hand soldered parts, namely the wires and LCD header, have not been cleaned. I find that surprising on a product with a fairly high price tag and on parts of the unit that the customer is going to see when the battery is replaced.
It looks like it does not use the power from the usb to power the unit? Just guessing from the lack of components around the usb connector. This would save the battery for those who would be using it a lot for component characterization.
Have you ever looked at an old ESI VideoBridge? It is still considered one of the most advanced LCR meters ever made, and it has numerous functions for characterising individual components and performing binning and pass/fail measurements.
have you tried the TC1 component tester? it apparently can test up to 37V for zener diodes. can also read IR signals to get codes from remotes but cant test voltage regulators.
Bought one (DCA 75) in 2017. Lasted 2 + years and crapped out. Will not turn on. Battery checks good 1.61 v dc. Battery polarization + - is correct. Battery is snug and secure. Never did any in circuit measurements, only tested components in my parts draw. Probably will not be buying another one any time soon.
Here is another quirky experiment. This time I 'punked' the DCA75 by first running a test on a diode, then going to the PN Junction tab and clipping in five different resistors and running a curve for each. I got the following: zmabz.smugmug.com/photos/i-QrsGJ28/0/O/i-QrsGJ28.jpg Cheers, Mark ******************************* PS This has generated an idea: Could your construct an interface that would be commanded by the DCA75 (thru the test leads) to run tests outside the nominal V - I limits of the DCA75 and return values back within its limits? The interface would provide a buffer between the DCA and the DUT and an adjustable scaling factor. For example instead of run a test from 0 to 12 volt you could run 0 to +120 volts or -120 to +120 volts. The output from the DCA would be scaled thru the interface and the return current measurements scaled within the limits of the DCA . The graph and data output from the DCA75 would need to be adjusted (scaled) to match those of my fanciful interface. Did I just make any sense? *********************************************************
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Great review thanks I just bought the DCA 75 Pro and its already saved me a lot of time it will pay for itself in no time.
I bought one DCA 75, is amazing.
great demo thanks for the info..
So does this show as much detail for a JFET as it does for the MOSFET? Info of the FJET testing capabilities of the DCA75 are scarce.
BTW, I found your RUclips page via MJLorton's video blog.
It seems to be unavailable from some suppliers now, I wonder if they are about to release an updated version.
Very nice video. The PC software could be very useful for the testing I perform.
A little surprised that Peak appear to have left flux residue around the input connections and the display connector.
I purchased a cheap Component tester from China. The first one that arrived did not work, but the seller immediately sent another. It works(ish) but doesn't give much confidence with the test results. Some tests give strange results with known good devices.
I will be purchasing the Peak DCA.
Bob Fuller I did notice the flux residue, but it's likely to be a no clean flux so shouldn't cause any issues. This device seems to work great though, so I wouldn't hesitate to recommend it.
Bob Fuller
I've never had a problem with mine. And the components it says are good, have always been good. Which helped me find the real culprit.
If I understand correctly, this DCA75 DOESN'T tell you if a semiconductor is Good or Bad. It gives you the operating parameters and identifies the DUT then you have to compare against the manufacturer's specifications to see if the semiconductor is operating correctly. I suppose another way to find out is to look at the curve traces and look for any distortion.
Is there a book of semiconductor specifications? In the "old days", there used to be booklets by RCA and GE with all the vacuum tube (valve) specifications. Is there a similar type book for semiconductors?
+Mystery47 No there's not really any databooks (there used to be before the internet) due to the huge number of devices available. If you want to know exactly the parameters then the datasheet is about your only choice, however, you quickly get to know the types of numbers to expect for a given family of components. It's quite rare for a semiconductor to 'fail a bit', so the numbers will be way out or it'll detect the wrong type of device if something is wrong.
It WILL tell you if you have a gross fault however. If any two leads go open or short, you get a failure notice. Other indicators of failure are "way out there" parameters, leakage (should read 0 for Si devices) or the wrong device being detected, though in the case of the latter, be sure to check the connections before discarding the DUT. Note that it cannot test beyond 10V or so and a few mA so you sometimes can still miss a bad device if it fails under higher load.
Hi there great video. Can this test resistors that are still on the board as this would be a right pain when there are 40 of them to go through
error shows NO Component when connected to
L7912CV
If I try to connect 2 wires only on any pins it detects it as zener diode. No response from manufacturer either.
How do use this information, if not an Engineer?
Quality parts, high quality SMD assembly but the joints for the hand soldered parts, namely the wires and LCD header, have not been cleaned. I find that surprising on a product with a fairly high price tag and on parts of the unit that the customer is going to see when the battery is replaced.
Do you believe is laziness?
How do you turn it off while is plugged into usb?
It looks like it does not use the power from the usb to power the unit? Just guessing from the lack of components around the usb connector. This would save the battery for those who would be using it a lot for component characterization.
Yep, it does, I think it was mentioned in the User Manual
Have you ever looked at an old ESI VideoBridge? It is still considered one of the most advanced LCR meters ever made, and it has numerous functions for characterising individual components and performing binning and pass/fail measurements.
have you tried the TC1 component tester? it apparently can test up to 37V for zener diodes. can also read IR signals to get codes from remotes but cant test voltage regulators.
between the dca75 pro and the esr meter which is better?
between an apple and orange, which is better?
good
quá hay
Bought one (DCA 75) in 2017. Lasted 2 + years and crapped out. Will not turn on. Battery checks good 1.61 v dc. Battery polarization + - is correct. Battery is snug and secure. Never did any in circuit measurements, only tested components in my parts draw. Probably will not be buying another one any time soon.
make it smaller we can still see left bottom
Here is another quirky experiment. This time I 'punked' the DCA75 by first running a test on a diode, then going to the PN Junction tab and clipping in five different resistors and running a curve for each. I got the following: zmabz.smugmug.com/photos/i-QrsGJ28/0/O/i-QrsGJ28.jpg
Cheers,
Mark
*******************************
PS
This has generated an idea: Could your construct an interface that would be commanded by the DCA75 (thru the test leads) to run tests outside the nominal V - I limits of the DCA75 and return values back within its limits? The interface would provide a buffer between the DCA and the DUT and an adjustable scaling factor. For example instead of run a test from 0 to 12 volt you could run 0 to +120 volts or -120 to +120 volts. The output from the DCA would be scaled thru the interface and the return current measurements scaled within the limits of the DCA . The graph and data output from the DCA75 would need to be adjusted (scaled) to match those of my fanciful interface.
Did I just make any sense?
*********************************************************
@Cherrybomb 452 Oh Gosh ! 7 years ago; what happened yesterday ?
Like it! A good test of the device itself.
made in china
+freak55beat This is made in the UK.
ok mate
uk made