I REALLY DOUBT that the Simpson Meter puts out 100 mA of Current. Especially Considering it has a 50uA Meter,
The Schematic of it Does Not appear to allow that either.
With regard to your own meter:
THIS IS ALSO A 50uA METER, And it Also has 10 Divisions between 0 and 2 Ohms.
Hello there,
I didnt realize there was a law passed by Congress that says that we have to have resistance meters that put out only a certain level of current and no more than that.
Just kidding of course, but there are a couple things wrong with your statements above.
First, the meter movement has nothing to do with the output current during a resistance test. A 50ua meter movement is quite common or at least was in the past, and can be used with any current from 50ua up to ten thousand amps or more, although i think few of us have used it up that high. It is the basic movement used in lots and lots of analog meters of all kinds. The current range is adjusted via a shunt resistance, and that was a very typical thing to do before maybe around 1980.
So it really doesnt matter if your meter has a different output current even if other things about it are similar, and im sure we could find other meters that put out different currents than that too. The Simpson 160 puts out 50ma with very low resistance tests as it has 1.5v and 30 Ohms on the Rx1 scale, and it also uses a 50ua meter movement. We could certainly build one from a 50ua movement that does any current we care to measure.
Second, the schematic clearly shows a 11.5 Ohm resistor in series with the battery and the battery is 1.5 volts. Did i read this right or are my eyes too tired right now? Check for yourself on page 17 i think.
Anyway, a 11.5 Ohm resistor and a 1.5 volt battery mean that if the leads of the Ohm meter are shorted together (very low Ohms under test) the current flow will be 1.5/11.5 which comes out to around 130ma.
130ma is surely greater than 100ma which i quoted previously.
Now if different models put out a different current that's not my concern unless someone comes up with a different schematic and he measures his short circuit current and it comes out to be less, and then we would just have to update our notes. But going by the only schematic we have available right now, it puts out 130ma. If you dont agree then simply state your reason and i'd be happy to look into this further.