Whenever you use an ohmmeter, you must first ensure that the device you want to test is disconnected from the supply. So the fact that your heater is rated at 240 V is irrelevant to this question. The heater must be disconnected from the supply BEFORE you contemplate measuring its resistance. Which 'ohms setting' to use is then simply determined by whichever setting gives you the best reading. For an analogue ohmmeter, this is whichever setting results in the pointer being towards the lower-resistance end of the scale.
The Diode Check setting on a DVOM is a special ohms setting that presents enough voltage to the tested device to conduct, if it were a diode. Old style VOM's did not have this problem, because they usually used a battery greater than 0.7 volts to run the ohm's scale. Modern DVOM's, however, can use very small voltages to measure ohms, and that would not cause a diode to conduct. The Diode Check setting fixes this limitation.
A contactor is tested by using a device called a Multimeter. By setting the multimeter to ohms and rx1 you can clip both prongs to the coil. If the multinmeter moves the contactor is good. If it doesnt move its bad.
ohms
A multimeter, often referred to as a "colomb meter" in some contexts, can measure voltage (volts) and resistance (ohms) among other electrical parameters. To measure voltage, you set the multimeter to the voltage setting and connect the probes across the component or circuit. For measuring resistance, you switch to the ohms setting and connect the probes to the resistor or circuit section. Always ensure the circuit is powered off when measuring resistance to avoid damage to the multimeter.
Whenever you use an ohmmeter, you must first ensure that the device you want to test is disconnected from the supply. So the fact that your heater is rated at 240 V is irrelevant to this question. The heater must be disconnected from the supply BEFORE you contemplate measuring its resistance. Which 'ohms setting' to use is then simply determined by whichever setting gives you the best reading. For an analogue ohmmeter, this is whichever setting results in the pointer being towards the lower-resistance end of the scale.
To test a dryer thermostat, you can use a multimeter to check for continuity. Disconnect the thermostat from the dryer and set the multimeter to the ohms setting. Place the multimeter probes on the thermostat terminals and check for a reading of zero ohms, indicating continuity. If there is no reading, the thermostat may be faulty and needs to be replaced.
To test a dryer thermostat, you can use a multimeter to check for continuity. Disconnect the thermostat from the dryer and set the multimeter to the ohms setting. Place the multimeter probes on the thermostat terminals and check for a reading of zero ohms, indicating continuity. If there is no reading, the thermostat may be faulty and in need of replacement.
To test a dryer thermistor, you can use a multimeter set to the ohms setting. Disconnect the thermistor from the dryer and measure the resistance across its terminals. Compare the reading to the manufacturer's specifications to determine if it is functioning properly.
To test a wire in a circuit, use a multimeter set to the resistance (ohms) setting. Disconnect the wire and touch one probe to each end of the wire. If the multimeter reads zero ohms, the wire is continuous (no breaks). If the multimeter reads infinity or a very high resistance, there is a break in the wire.
To ohm out a wire and test its electrical resistance, you need a multimeter. Set the multimeter to the resistance (ohms) setting. Connect the multimeter's probes to each end of the wire. The multimeter will display the resistance value in ohms, indicating the wire's electrical resistance.
To test a dryer timer, you can use a multimeter to check for continuity in the timer contacts. Set the multimeter to the ohms setting and touch the probes to the timer contacts. If there is continuity, the timer is functioning properly. If not, the timer may need to be replaced.
Find out the ohms range it must be within and do an ohms test.
To check the resistance in a wire, you can use a multimeter. Set the multimeter to the resistance (ohms) setting, then touch the probes to each end of the wire. The multimeter will display the resistance measurement in ohms.
20k is equal to 20,000 ohms (20 kilo ohms) and 200k is equal to 200,000 ohms (200 kilo ohms) of electrical resistance
To test the coil on your 1997 RM 125, you can use a multimeter to measure the resistance. Disconnect the coil from the bike and set the multimeter to the ohms setting; measure the primary and secondary windings according to the specifications in your service manual. For the primary side, you should see around 0.4 to 2 ohms, while the secondary side should read between 5,000 to 8,000 ohms. If the readings are outside these ranges, the coil may need to be replaced.
Find a digital multimeter (fairly inexpensive) and stick the test leads into different ends of a piece of fruit. Use the "ohms" setting on the meter. The fruit that has the lowest reading will have the best conductivity.