Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
bd139:
If it still says uncalibrated then they didn't store zero or calibrate one of the ranges. You will have to turn the cal switch and step through each range and find out which one it is. The CAL annunicator will flash on that range when you hit it. Run through them in the order of the manual, just don't hit SGL/TRIG when you're doing it :)
Worth shorting the input and checking zero is ok as well.
Specmaster:
--- Quote from: bd139 on May 23, 2018, 02:06:22 pm ---If it still says uncalibrated then they didn't store zero or calibrate one of the ranges. You will have to turn the cal switch and step through each range and find out which one it is. The CAL annunicator will flash on that range when you hit it. Run through them in the order of the manual, just don't hit SGL/TRIG when you're doing it :)
Worth shorting the input and checking zero is ok as well.
--- End quote ---
I was just checking the ACV and I noticed that the CAL annunicator was flashing and sure enough the mains was reading approx 5V lower than other meters were reading and the CAL flashes also on the ACA and the 2W resistor setting as well.
So how did you calibrate the AC ranges? I don't have anything I think that is stable enough unless the 240V mains is good enough?
bd139:
I used a function generator and another meter as a reference. You only need to cal on the 3v range. I think you’re just calibrating the AC converter and the rest is based on the DC cal.
Specmaster:
--- Quote from: bd139 on May 23, 2018, 02:30:07 pm ---I used a function generator and another meter as a reference. You only need to cal on the 3v range. I think you’re just calibrating the AC converter and the rest is based on the DC cal.
--- End quote ---
Excellent, so that should be OK, and the ACA?
bd139:
I don’t think that needs cal once the AC converter is done.
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