Good in circuit ESR meter not too pricey :) advice please. - Page 1
Forum section: electronics / testgear

author: cypher007
author_rank: Contributor
timestamp: April 16, 2020, 12:00:47 am
content: Need something to test caps preferably in circuit though not a deal breaker.Mainly low voltage stuff in old 8bit computers. Though would like to test some high voltage ones that are in a TV I’m trying to repair.Seen some like this:https://www.ebay.co.uk/itm/LCR-TC1-Transistor-Tester-ESR-Capacitance-Meter-Electronic-Component-NPN-PNP-UK/202903721653?_trkparms=ispr%3D1&hash=item2f3e0116b5:g:pF8AAOSwP8leQ9dn&enc=AQAEAAACYIQvEcHUrT7nmUC3yY5qbPyaBN1nJEDYW8MyypsJPgXKxIntehGqQQl8nLx%2FEZs3RsYKai2kiciNcsTOUYWNp0%2BRjBa7yf9xjj3qAR%2BfGkSZQrYHSq2ZR9PmJtXhjlylvfNhvHMwOmjIgwxYNuUZVOWnaRDs9n%2BArefHS6dsiGhuJQxkGfsG%2Btjon9sJ2eaXEKmfLOsqdNzf4%2BDvNCGUUSZs6BgKGpT%2FZ3jxlPEo6%2FXCILDPOAztbtY9DDVPqRKzh5B0FjvMbm5yQfqST%2BIEkHYuZ1ApNWfIxJgxameDanrfBViebmKF39L%2BgPZMd%2B9QoDBpLEk1A8ABPYAykL9vu%2BVaRVYfALhCI8WuNHTWRYaROKpUCXfTTaUf6v05Frf%2BYaXfdR%2BrAeYTQ%2BH5EhcO3BZE8tmGiYNfVyz9Tzyo%2B9ReQxDTh6DZ6vLEelPJxKBFIvSq%2BiqoDfphPeQhnfEH7av3olHpxmyBZi2sS74ifOXjHTGBVINF8dXBDDQzvf%2F7JCoI9peRvcQfcH92lQg5JEMWJOfSEAPz7LKNXlTE0x9TRtVz%2BQlUNhzD4gsbH5Ho4Mp%2F94jnGvTf8L9umiZxb3FaMZJaIMbOC51%2B%2FlNvkEl7%2FA3Ex0cuV5P7ipRqlFzegeJY84Sk9hI72CFfD%2B%2FD5QN8zKFP8tkHakkFFgGODMid18fFiG2of5AOLQxnL1tz5i4v71RVUHhRI9x713sM068L4hgrExhlizDcPbYe1MSY%2BSxv71MIyRzvLMf0AD%2BN9b7%2FpDBJhrRLTDlc6bltol9RRdFmSeqJk9KLEETBhMVC&checksum=2029037216534238dc4e56db44959cdffd3ad2f2d87fAnd this:https://www.ebay.co.uk/itm/MESR-100-Professional-ESR-Meter-100kHz-In-Circuit-Tester-Capacitor-Ohmmeter/162980517014?_trkparms=ispr%3D1&hash=item25f2655496:g:jlgAAOSwUeVdqr7E&enc=AQAEAAACYIQvEcHUrT7nmUC3yY5qbPyaBN1nJEDYW8MyypsJPgXKym2Jdff8P6pcVkPslsrmD%2FonBXEleKxkdhMMnaWSQ9CqmDiG%2FZvTXcR032Yn2SAkC4OlcuvZQsd6kjJY8az1XjPexmdjmbzCgd3G15w13gCt6pepvE6Oahdk29I40hdrfr4kJTgAs1VnKxdyDoolbL3kZYdyihx7Ui4A2NeN%2FbdKqFlDGrS32l74c8NtP1aC0PVQCvP5CeOlAEg8dtBall0JiHODvIMciAKfk7Ez6RqdBMj%2B5FN9tTft4oMrFqk97zAYS%2BaFXZMx4EDe7bBhrQtzuYIYFy826ScDuGWOdjtWWOTbopP8t0m1Z6jU0Pqr6%2FV9RS7ojjgP9gS488KpfR%2BXNun6LahKEzRP0uIENEAEVwQqhHRQdsfAZM0dwVYD4sjbR2PqGNBSOFacarvQ6GaozbCzqS0I5B6ELmueLNmWbGid1iZSJ677ELYZpQrYVYN%2Bb%2FNVEzFMzfFfDwnDCpvqcH1QibzIwOSGDHjVLVItMKMyp4PGNqpm1I7FAg2NqIDNCXCTJLnCGhWEbW75AlazbYJ3cfkjCznKUoGgoNhB3MJPU%2BaJ3LxoTbfiz1sC9BXlg%2BnPPVMj0FvsRAZyENerrE%2FigUeB8BFNiZKNhuuSu2slZp55kgLnx3%2BzthA0tfrE0HY%2BdS9ITS1ZdoD2aCWIt55E4OMgcyTLYlZDsKJFwP5UBVnWcsRk6Ka6yAb6MiKExbbFrNh8XUdJp3DsTenKlxgwPtRFz579Rgjl2z1tYexTSiuT1LukR4gbbILy&checksum=1629805170144238dc4e56db44959cdffd3ad2f2d87fJust need to know if a cap is bad not how bad it is.

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: April 16, 2020, 01:55:46 am
content: Hi,The first one LCR-TC1 will not read them in circuit.The MESR-100 will read them in circuit.If you want to build your own, take a look at this thread:https://www.eevblog.com/forum/projects/5-transistor-esr-meter-design/Regards,Jay_Diddy_B

author: Microcheap
author_rank: Frequent Contributor
timestamp: April 16, 2020, 02:39:30 am
content: I don't have one yet, but I also have been looking for a cheap in-circuit LCR meter and I came across this Mastech MS8911:https://www.ebay.com/itm/MASTECH-MS8911-Smart-SMD-Tester-Auto-Range-Auto-Scanning-6000-counts-SMD-Tester/223328356461http://mastech-group.com/products.php?cate=104&PNo=78#_But that is for SMD components and maximum test frequency is 10kHz. The MESR-100 looks interesting, though.

author: cypher007
author_rank: Contributor
timestamp: April 16, 2020, 03:37:48 pm
content: Bought the Mesr-100. See how it goes. One thought if there are more than one cap in parallel how does it test the one cap in the circuit?

author: kripton2035
author_rank: Super Contributor
timestamp: April 16, 2020, 03:49:54 pm
content: plenty of esr meters to choose from here :http://kripton2035.free.fr/esr-repository.html

author: Jay_Diddy_B
author_rank: Super Contributor
timestamp: April 16, 2020, 04:58:49 pm
content: Quote from: cypher007 on April 16, 2020, 03:37:48 pmIt doesn't, it tests them both in parallel. If you want to test them individually you have to remove them from the circuit.Regards,Jay_Diddy_B

author: kripton2035
author_rank: Super Contributor
timestamp: April 16, 2020, 06:35:25 pm
content: no esr meter can test caps in parallel, it sees the caps a one single cap.