chinese transistor/component tester callibration - Page 1
Forum section: electronics / projects

author: p.larner
author_rank: Frequent Contributor
timestamp: October 11, 2023, 01:00:00 pm
content: This lm 328 based lcd transistor tester kit came todayhttps://www.aliexpress.com/item/1005005239475810.html?spm=a2g0o.productlist.main.11.4a52jeYmjeYm3V&algo_pvid=4dd79c56-cbcc-4616-a30d-4557745160e8&algo_exp_id=4dd79c56-cbcc-4616-a30d-4557745160e8-5&pdp_npi=4%40dis%21GBP%2110.91%218.19%21%21%2194.99%21%21%40211b613116970289758716042ec0eb%2112000034846936855%21sea%21UK%212308464272%21&curPageLogUid=DuxadSeAW7PFI have built it but get a message NOT CALIBRATED!,any idea how i can calibrate it,as no mention of calibration mentioned on its paperwork.

author: Dan123456
author_rank: Regular Contributor
timestamp: October 11, 2023, 01:04:45 pm
content: If it works similar to mine, you short pins 1,2 and 3 (first 3 slots of the top row) and hit testMine came with a little 3 prong metal thing to do that but even just some wire should workP.s. if it works the screen will say “calibrating” and then ask you to remove the short at some point

author: p.larner
author_rank: Frequent Contributor
timestamp: October 11, 2023, 05:37:01 pm
content: mine is ver 1.12k,i tried shorting leads together but it says going into selftest mode then comes up showing 2x zero ohm resistors,

author: macboy
author_rank: Super Contributor
timestamp: October 11, 2023, 05:49:51 pm
content: The type with rotary encoder and graphical LCD is much more practical, but this kind works too.I think to enter the menu, hold the button down until the menu is shown. Tap the button to select different functions. Hopefully calibration is in there. Press and hold to activate.There are two main types of firmware, but many variations and different versions of those, so it's impossible to give 100% accurate instructions. You'll need to try for yourself. You might also check out this very long thread:https://www.eevblog.com/forum/testgear/$20-lcr-esr-transistor-checker-project/

author: p.larner
author_rank: Frequent Contributor
timestamp: October 11, 2023, 10:45:19 pm
content: got there its just its hit and miss what it does on powerup with leads/ziff shorted.will test it later and see if its ok,i nuked my last one forgetng to discharge a cap that had 200+v on it.

author: Dan123456
author_rank: Regular Contributor
timestamp: October 12, 2023, 12:25:30 am
content: Quote from: p.larner on October 11, 2023, 05:37:01 pmOh yeah! Sorry mine says “selftest mode” too rather than “calibrating”Sounds like they work the same way and that how the manual tells me to calibrate mine so fingers crossed yours is all good now

author: p.larner
author_rank: Frequent Contributor
timestamp: October 13, 2023, 03:42:25 am
content: this is the transcript from the seller lol :11/10 13:53this came today,ive built it but it gives a message not calibrated,the paperwork says nothing about calibration,how do i calibrate it to romove the message?.ReadDear friend,Welcome to my store, wish you have a nice day and happy shopping.Our working time is 8:00am-18:00pm(Beijing Time), we will reply you ASAP when we receive your message. Products are on sale, you can make a order normally. Then we will ship the goods to you ASAP. If you have question about order, you can contact us at any time. We will help you to solve it, we are always with you.Best regardsYesterday 01:17你好，亲爱的朋友，这个产品不用校准，装好就可以使用，我们已经对它校准过了。Hello, dear friend, this product does not need to be calibrated, it can be used after being installed. We have already calibrated it. Alibaba Translation或者你可以拍个产品不能工作的图片或者视频吗？我让技术人员看一下你具体遇到了什么问题。Or can you take a picture or video of the product not working? I'll let the technicians see what problems you have encountered. Alibaba Translatio