| Products > Test Equipment |
| Protek D620: 100,000 count forgotten multimeter. |
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| jchw4:
I got my hands on a very unusual 100,000 count multimeter with trend capture: Protek D620. The information on the web is very scarce: I was able to find only a few datasheets, User Manual in Polish (only!) and a Calibration Manual. This site has some data and photos: https://www.gotronik.pl/multimetry/protek_D620.HTML Web archive has only a single partial capture of the product page https://web.archive.org/web/20040811163957/http://www.protektest.com/ProdInfo.asp?prodId=620 . I could not find a software for this meter in any "Download Software" captures https://web.archive.org/web/20080129111348/http://www.protektest.com/ProdDnLd.asp?type=SW :( . If somebody has software or a user manual, please share! Somebody on this forum mentioned that there was a protocol description somewhere. Anyone? |
| jchw4:
The meter was dead, consuming 100mA at 3V from my power supply even when off. After disassembly, the damage was clear. U11 mark was difficult to read, but it turned out to be TPS763 5.0V LDO (SOT-23-5 marked PBGI). Replaced with recommended TPS709. R3 was nearly unreadable too, but turned out to be marked "10R0" and still measured 10 Ohm! |
| jchw4:
The meter looks very nice, has 100,000 counts in all ranges, live trend capture and glowing buttons! Not really as sci-fi looking as my phone decided to present, but still nice ;) . Meter seems to be in spec compared to my DMMCheck+ except 100k ohms range, which is significantly off. Did not investigate this yet. My main concern was about pretty long whiskers that grew out of the fuse holders. Most of them fell off before I was able to capture them but here is a photo. |
| jchw4:
Meter PCBs. |
| Gyro:
That looks like a nicely featured meter for decent resolution, display functionality and data logging. Treat the indicated CAT ratings with utmost suspicion though, there's no way that they align with the PCB photos. |
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