I have a multi-tester. And its model name is J0411A. And it looks like thisYou might see that this multi-tester includes a resistor tester. When I set the tester to x1 of Ohm section and connect + to - directly, I get about 2.6 Ohm. When I set the tester to x10(other things are same), it points 1.8 which it means 18 Ohm. Why two numbers are different?