two methods to verify a low ohm meter i think is not working properly?

[allsortscraig]

I am looking to answer a question on a course, and cant think of 2 methods to verify readings on a low ohm meter....please help?

 

[Pete999]

1 check box

 

[ifindoubtdont]

Use a known length and size of cable (GN3 page 104 Table A1), apply temperature correction factor (GN3 page 105 Table A2), calculate expected resistance, null leads, test cable, record resistance. Is recorded resistance same as calculated resistance?, yes :- meter is probably ok. no :- test another known length and size of cable. Still not the same. Send meter away to be re-calibrated.

 

[Engineer54]

Re-check with a calibrated alternative low ohm meter!!