Fluke 77 Series III 문제해결

My Fluke 77111 has blew a fuse and after replacing the fuse , the display was ok but will not read anything ,then i found this site and check out a few trouble shooting tips ,found out that my black lead was shorted , swapped lead and now I am good to go .

Thanks for this site .

I don’t like fluke 77 much. I like more Fluke 87 series especially Fluke 87V https://bestmultimeterreviews.org/fluke-... multimeter.

Part 1 This is more of a Safety Recall notice… In 1991 +- the Fluke 77 and the Fluke 77 AN/BN Military version had a fault… Fluke the Multimeter people tied to save pennies in the early 90's... A Engineer designed the Fluke 77 and when it went to production retired proud of his new product. The New Engineer was given a challenge to see if he could save Fluke some money... He was asked to look for any unnecessary components. He found some surface mount capacitors and he ordered them removed as he felt they were not needed... The Navy was a big user of the Fluke 77, I have had a few over the years. Even Sony had hundreds when I worked in the Calibration Lab. So sometime in the early 90's Technicians were getting shocked and killed.... Touching a energized electrical circuit... Mostly 450 volt AC. Fluke 77 Meters were involved... Finally 2 Tech's working together measured a circuit and it showed 000 on the Fluke 77. They both measured it... BOOM... DEAD TECHNICIAN.

Part 2 Based on the Surviving Tech Fluke was contacted and they were able to duplicate the 000 with the same meter.... The meter had the missing Capacitors to save money... It turns out that if the tech put the black lead on the 450 volt first then the red lead it would cause the meter to lock up at 000. Red lead first no problem.... I first heard of the recall my last 4 years in the Navy. The Electronic Tech's came to every shop and ship on base in San Diego checking Serial Numbers. They sent them in for the fix. A melted "R" in front of the serial number = a FIXED Meter... So I get to Sony in 1995 and in my 3rd and 4th year work in the Calibration Lab. First week I was sent off to LA to Fluke Calibration School. I asked about the recall and the Instructor told us the whole story I never heard in the Navy. So I go back to Sony and find over 50 meters in the Calibration Data Base that I sent out for repair.

Part 3 Then talking to a Former Coworker Mechanic about the meters, he was Retired Navy he mentioned he had a Fluke 77 in his Sony Tool Box not on the calibration list... Troubleshooting meters were not required to be calibrated only meters used in the Manufacturing process... So I put the word out and I find another pile of Fluke 77' in mechanics tool boxes... I get them fixed and add them to the Calibration Data Base... That way they get a fresh battery every year... If you call FLUKE today with a Fluke 77 Serial Number and it needs the FIX they no longer have the parts... They will send you a FREE METER..... Here is a picture off the internet showing a FLUKE 77.... The KILLER METERS..... SO in the end it cost Fluke a lot of money....