Author Topic: T7 Tester  (Read 13100 times)

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Offline slybundaTopic starter

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Re: T7 Tester
« Reply #25 on: January 22, 2024, 02:48:20 pm »
I just got an "AITRIP" brand T7 tester from Amazon. Mine has an APT32F172K8T6 microcontroller. You know you're getting the good stuff when they use a genuine TFXTDOL brand ZIF socket.  ::)

why does your T7 not have the crystal oscillator that my one does? this is odd.
 

Offline NF6X

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Re: T7 Tester
« Reply #26 on: January 22, 2024, 02:53:18 pm »
Good observation. I didn't notice that. I speculate that the microcontroller has an internal RC oscillator. I wonder how much that affects the measurement accuracy? I didn't get this expecting to make accurate measurements; I mostly wanted it to answer questions like "is this (still) a transistor". But if it's less accurate due to not using a crystal timebase, that might be a problem for folks who don't already have lots of other test equipment.
 

Offline SAIT_Tim

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Re: T7 Tester
« Reply #27 on: January 30, 2024, 04:11:23 pm »
When I short 1-2-3 to enter the self-test mode, it identifies itself as "FNIRSI-TC1". It does not display a version number at the end of the test.
I've recently acquired the same tester I suspect as it identifies itself the same way despite saying T7 on the front.

I thought it was going pretty well until I measured a couple of new BT136-600B Triacs (Farnell sourced). It identified them as Triacs but displayed the pinout completely wrong...

Can anyone else verify this, and whether other variants of the tester do the same?

Cheers
 

Offline slybundaTopic starter

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Re: T7 Tester
« Reply #28 on: January 30, 2024, 10:42:40 pm »
Thats interesting, iv not got any triacs at hand to check with. What version firmware has your T7 got? Do you have a pic of its insides?
 

Offline SAIT_Tim

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Re: T7 Tester
« Reply #29 on: January 31, 2024, 10:20:50 am »
Thats interesting, iv not got any triacs at hand to check with. What version firmware has your T7 got? Do you have a pic of its insides?
I purchesed it a few weeks ago from WAVGAT store on Ali but otherwise its unbranded.

It looks to be identical to yours in every way - same MCU marking, same board revision and layout, and same FNIRSI-TC1 message when you self test, without a firmware revision number when it completes.

I did some further investigation:

If you attach Triac with MT1 > Pin1, MT2 > Pin2, G > Pin3, it reports on screen with MT1 and Gate transposed.

If you attach Triac  with MT1 > Pin1, MT2 > Pin3, G > Pin2, it reports the pin out correctly.

Some other connection combinations display correctly and some don't...

Maybe FNIRSI will fix the firmware  8)

Oh, and these Triacs are BT136-600E, not B as previously mentioned.
 

Offline madires

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Re: T7 Tester
« Reply #30 on: January 31, 2024, 11:58:54 am »
I've checked a BT136-600 (standard, not E for sensitive gate) with an original TC1. The TC1 got the gate correct but confused the main terminals. This is to be expected as the TC1's firmware is based on the k-firmware. The m-firmware has an additional cross-check to figure out the main terminals. What surprises me is that your T7 even messes up the gate. Don't wait for a new firmware from any Chinese clone manufacturer. They all take the OSHW firmwares, modify them, but never publish any code.
 

Offline NF6X

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Re: T7 Tester
« Reply #31 on: January 31, 2024, 03:10:50 pm »
My T7 is just an appetizer. The main course will be my own hardware variant, running your delicious firmware.
 

Offline slybundaTopic starter

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Re: T7 Tester
« Reply #32 on: January 31, 2024, 07:47:30 pm »
Odd why does my one show the firmware version after it self calibrates and your one doesnt if both have same hardware inside?
 

Offline SAIT_Tim

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Re: T7 Tester
« Reply #33 on: February 01, 2024, 09:03:26 am »
I just got an "AITRIP" brand T7 tester from Amazon. Mine has an APT32F172K8T6 microcontroller. You know you're getting the good stuff when they use a genuine TFXTDOL brand ZIF socket.  ::)
Sorry if I confused everyone, my T7 is exactly the same as this one and doesn't show FW version.
 

Offline slybundaTopic starter

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Re: T7 Tester
« Reply #34 on: February 01, 2024, 11:17:06 am »
ahh, that one is named T7 but its different from my one internally. its odd since i believed all of these devices were identical and manufactured by one specific company and then just rebadged for different resellers.
turns out there is some hardware difference in them too so maybe they are made by different companies or maybe different revisions?
 

Offline madires

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Re: T7 Tester
« Reply #35 on: February 01, 2024, 12:56:37 pm »
There are about 10 variants of the TC1/TC2/T7/T7H.
 

Offline slybundaTopic starter

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Re: T7 Tester
« Reply #36 on: February 14, 2024, 10:49:41 am »
Modded the test leads that came with the tester, it had short ones but biggest issue was lack of flexibility. 24awg pvc wires it comes with stock, desoldered the connection at the hook clips and crimped on new dupont connectors to some silicone 22awg wires now its far easier to use thanks to wire flexibility.
 


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