Fluke 1010-A, no voltage to Ohms ranges to test. Random numbers displayed?

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.

a. Connect test leads to the + and COMMON terminals.

b. Turn the function selection switch to the DC OHMS position.

c. Turn the range selector switch to the 200mV position.

d. Short the test leads together.

e. Allow the instrument to warm up for 15 minutes.

f. Using an insulated screwdriver, adjust the potentiometer through the hole located directly below the analog display for a numerical display of 00.0. http://www.simpson260.com/downloads/simpson_360-2_user_manual-1975.pdf

try looking for Invoice (it should have model) on it or ask place where you purchased unit from

check input protection (thermistor (black components - first in line at Voltage terminals should be around 1kOhm, next is 2W resistor = 1kOhm and then 3 varistors (blue) open or very high ohms).

there is a fuse inside of the unit or maybe clamp is faulty

check and clean switch connections

Switch is the problem here, see if you can clean contacts or check if switch contacts are broken.

http://www.fluke.com/fluke/auen/Electrical-Test-Tools/Electrical-Testers/Fluke--T5.htm?PID=55986

download manual and read it.

Error 1 is an indication that the self test has failed. This will require repair at an authorized Fluke service center. There is an internal problem with the meter. The only thing that you can try is to replace the internal battery. Should the battery be defective, the internal testing can be effected. I have only seen this occur once, but it is worth the attempt. Should a new battery not fix the problem, return the meter to Fluke for repair.

Dan

I use a fluke everyday. If it has been dropped, it will need to be recalibrated by fluke. Mine has a range button, try to use a lesser or greater range depending on what range it fluctuates