Hello all I got problem with my Fluke 87V multimeter for reading ohm always read 5 ohm without connecting with any thing Ac Dc reading are wrong

If your Fluke 21 III multimeter is not reading AC or DC voltage properly and the ohms sign comes on in voltage mode, it may indicate a problem with the internal circuits of the multimeter or the leads. Here are some steps you can take to troubleshoot the issue:

1. Check the leads: Ensure that the leads are properly connected to the multimeter and the test points. Make sure there are no breaks or cuts in the leads. Try using a different set of leads to see if the issue persists.
2. Check the batteries: A weak or dead battery can affect the accuracy of your multimeter readings. Check the batteries to ensure they are properly installed and have sufficient charge.
3. Check the settings: Make sure that you have selected the appropriate range and function on the multimeter for the measurement you are trying to take.
4. Reset the multimeter: Reset the multimeter to its default settings to see if this resolves the issue.

If none of the above steps resolve the issue, it may indicate a problem with the internal circuits of the multimeter, and it may need to be repaired or replaced.

Check the internal fuse - usually there for amperage readings.

send for service to fluke (microprocessor chip faulty)

clean terminals with cotton bud and ISO and then blow with air

dirty terminals may trigger 'leads' error

something damaged in input circuit

input protection circuit is blown , see if you can find fusible resistor and check for open circuit (should be 1kOhm) - big resistor on the right straight from the Volts input

You can read the motor/generator windings with a volt ohm meater. Is it dc or ac? You should be able to read some voltage as long as it is turning? If it is a dc generator it will read dc voltage at the slightest of wind speed. If it is an ac generator it may have to be above 5 mph to get a reading. No reading could mean a broken wire.