Products > Test Equipment
TH2830 vs TH2832
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luudee:

--- Quote from: KungFuJosh on July 10, 2023, 03:25:58 am ---
The ST2830 firmware also has similar issues to the ST2832. Both Sourcetronic firmwares are older than the Tonghui versions. The ST2830 firmware has less bugs compared to the 2832.

The hardware is identical between the units and likely the brands too. I'm sure all the user manual stuff is essentially the same besides the logos.
...

--- End quote ---


@Josh, yes, fundamentally the HW is identical. BUT, the contents of the Altera MAX II CPLD may be different. At this point unknown.
The CPLD is clearly between the NXP MCU and the Analog box ....

The user manual, specifically covers all three models, TH283x (TH2830, TH2831, TH2832).  Where the differences
appear to be in the Frequency Ranges and number of points ....

Cheers,
luudee


KungFuJosh:

--- Quote from: luudee on July 10, 2023, 05:54:23 am ---@Josh, yes, fundamentally the HW is identical. BUT, the contents of the Altera MAX II CPLD may be different. At this point unknown.
The CPLD is clearly between the NXP MCU and the Analog box ....

The user manual, specifically covers all three models, TH283x (TH2830, TH2831, TH2832).  Where the differences
appear to be in the Frequency Ranges and number of points ....

--- End quote ---

I've already confirmed that there are no set limitations on any of the features, it's entirely controlled by the firmware. TH2831 is different hardware, that's an older device (EOL).

Running the patched firmware, I can type in any frequency I want, and it will work and register correctly on my DMM. DC bias, etc. Everything works. The only issues I've run into are firmware bugs.

This is from my test with the patched firmware:
Martin72:
Hi,

I'm at work at the moment, all results later.
One thing:
97k Ohm at 100kHz...
KungFuJosh:

--- Quote from: Martin72 on July 10, 2023, 02:06:57 pm ---97k Ohm at 100kHz...

--- End quote ---

Don't forget it needs to be warmed up for 30 minutes before correction. 😉
mawyatt:
Had a few minutes and turned on the TH2830 and IM3536, let them warm up for ~45min and grabbed some 0603, 0805 and 1206 100K resistors. Had some standard 1%, and some 0.1% and a couple low TC (15 and 25ppm) types.

Edit: Remember to always let these instruments warm up with the measurement fixture attached  ;)

Did an open/short cal with SMD fixtures, one on each instrument. Open was ~1206 spacing, short with plungers together under normal pressure. If we were doing a serious measurement, then the short would be done with a zero ohm SMD device of the same size as the DUT, and the open would be done with the plunger spacing same as DUT.

Both instruments agree well in Impedance Magnitude, Angle, Equivalent Parallel Resistance & Capacitance measured at 100KHz. The equivalent capacitance seems reasonable for these SMD devices (~0.05pF).

Anyway, the TH2830 is certainly a capable LCR meter and glad we have one on the bench to supplement the more expensive IM3536, a number of years past wise investment indeed :-+

Edit: Will post results if interested but don't want to clutter up the thread. Should have done DCR measurements as well and compared with our KS34465A, but didn't  ???

Added per request, here's a few measurements including DCR and a KS34465A DCR measurement.

Setup 100 ohm output, 1V, 16 Avg, Slow at 100KHz.

Size                                  TH2830                                                                        IM3536

1206 1%             99.9877K -0.185 degrees, 99.9876K @ 0.05130pF      100.001K  -0.201 degrees, 100.011K @ 0.0559pF
0805 1%             100.164K -0.209             , 100.164K @ 0.05799pF      100.186K -0.247             , 100.185K @ 0.0685pF
0805 0.1% 15ppm 99,9706K -0.180           , 99.9709K @ 0.04988pF       99.9849K -0.218            , 99.9841K @ 0.0606pF
                            99.9712K DCR                                                         99.9830K DCR
        KS34465A                                       99.97951K DCR


Best,
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