Quote:
Originally Posted by Mark M
Arthur,
I could not find anywhere in the manual where it states that the meter uses the ON pulse width. I called EXTECH (mfg for this Sears multimeter) and tech support confirmed that they have no documentation stating such. I relayed my story of checking the meter against the Indy MB mechanic's duty meter and he concluded that the meter appears to be displaying ON vs OFF as a %.
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It is pretty sad that their tech support could not answer this question...
It seems to me a simple test would be connect to +12 and it will read 100% and then connect to ground and it will read 0%. I was a bench tech and the MB system of measuring the "percentage off" duty cycle does not strike me as odd since "low side switching" is very common in control systems. You could reverse your leads as stated or just subtract the number from 100.
Mike
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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra
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