My 52-0060-2 Mastercraft Digital Multimeter will not record Resistance. I accidentally but the two leads across 120 vac while it was set to the Resistance scale. When set to 2000k ohm it shows all zeros, 200k it shows 00.7 and strike the two leads together it will show 00.0, 20k it shows 0.71 and strike the two leads will show 0.00, 2000 scale shows 722 and goes to 000 when the two leads touch. 200 scale reads 78.3 and drops to 00.3 when the two leads touch. The diode scale reads 297 and drops to 000 when the two leads touch.

All other scales seem to be working OK. Anyone care to diagnose the possible problem this accident may have caused? And why I would be getting these readings on the Resistance scale?

Related Manuals for Mastercraft 052-0060-2. Multimeter MasterCraft 52-0052-2 Instruction Manual. Auto-ranging digital multimeter (15 pages).

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1) If you want the exact same one, it usually goes on sale for $10 in this kit at Canadian Tire. 2) I have used an earlier version of this Canadian Tire multimeter and it seemed okay. Install wifidog on windows 8.

It goes on sale for as low as $19.99 or $14.99 if you are patient. I borrowed the above from a friend so I was obviously not going to see if the ohms range would survive on mains. 3) Better multimeters are designed to survive 'oops' moments and as tom66 mentioned Dave Jones at eevblog regularly does the ohms/mains test in all his reviews. 4) Martin Lorton over at killed his Uni-T 90C trying to measure frequency and turn the rotary dial past ohms while the probes were plugged into 220V AC. Details in this video 5) If you want to spend a bit more, there are a number of other options.

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--- end sig file. Voprosi dlya attestacii vospitatelej dou s otvetami. From the picture retiredcaps posted, the meter looks like a re-packaged '830' style meter. In which case, yes, it's hardly worth the time.

Anyway, the schematics that I have seen for those type meters show a PTC (thermistor) and a transistor wired as an zener diode (collector/base shorted) is switched in to protect the ohms, continuity and diode-test ranges from over-voltage. Since your meter reads near zero, I would hazard a guess that the transistor has become a near-short. If that's right, simply removing it might restore functionality, although leaving the meter with no protection at all.

From the picture retiredcaps posted, the meter looks like a re-packaged '830' style meter. In which case, yes, it's hardly worth the time. Anyway, the schematics that I have seen for those type meters show a PTC (thermistor) and a transistor wired as an zener diode (collector/base shorted) is switched in to protect the ohms, continuity and diode-test ranges from over-voltage. Since your meter reads near zero, I would hazard a guess that the transistor has become a near-short. If that's right, simply removing it might restore functionality, although leaving the meter with no protection at all.

Thanks modemhead can you identify that PTC arrangement on the pictures I have attached? And if I can remove this why would I not be able to replace it? I assume it consist of a number of small components? It is not the cost that motivates me its the need to keep these things out of the landfill??? Disclaimer here: All these type meters have a similar heritage and similar circuitry, but I'm looking at a schematic for one that doesn't match yours exactly.