- Accurate Multimeter 17205 Manual Instructions
- Accurate Multimeter 17205 Manual Pdf
- Accurate Multimeter 17205 Manual Diagram
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Accurate Multimeter 17205 Manual Instructions
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Resistance measurement basics
When measuring resistance, all musltimeters use exactly the same principle whether they are analogue multimeters or digital multimeters. In fact other forms of test equipment that measure resistance also use the same basic principle.
The basic idea is that the multimeter places a voltage at the two probes and this will cause a current to flow in the item for which the resistance is being measured. By measuring the resistance it is possible to determine the resistance between the two probes of the multimeter, or other item of test equipment.
How to measure resistance with an analogue multimeter
Analogue multimeters are good at measuring resistance, although they are a few points to note about the way in which it is done.
Another aspect of using an analogue multimeter for measuring resistance is that the meter needs to be 'zero'ed' before making a measurement. This is done by connecting the two probes together so that there is a short circuit, and then using the 'zero' control to give full scale deflection on the meter, i.e. zero ohms.
There are a few simple steps required to make a resistance measurement with an analogue multimeter:
- Select the item to be measured: This may be anything where the resistance needs to be measured and estimate what the resistance may be.
- Insert the probes into the required sockets Often a multimeter will have several sockets for the test probes. Insert these or check they are already in the correct sockets. Typically these might be labelled COM for common and the other where the ohms sign is visible. This is normally combined with the voltage measurement socket.
- Select the required range The analogue multimeter needs on and the required range selected. The range selected should be such that the best reading can be obtained. Normally the multimeter function switch will be labelled with the maximum resistance reading. Choose the one where the estimated value of resistance will be under but close to the maximum of the range. In this way the most accurate resistance measurement can be made.
- Zero the meter: The meter needs to be zero'ed. This is done by firmly placing the two probes together to give a short circuit and then adjusting the zero control to give a zero ohms (full scale deflection) reading. This process needs to be repeated if the range is changed.
- Make the measurement With the multimeter ready to make the measurement the probes can be applied to the item that needs to be measured. The range can be adjusted if necessary.
- Turn off the multimeter Once the resistance measurement has been made, it is wise to turn the function switch to a high voltage range. In this way if the multimeter is used to again for another type of reading then no damage will be caused if it is inadvertently used without selecting the correct range and function.
Accurate Multimeter 17205 Manual Diagram
Analogue multimeters are ideal pieces of test equipment for measuring resistance. They are relatively cheap and they offer a reasonably good level of accuracy and general performance. They normally provide a level of accuracy that is more than sufficient for most jobs.
How to measure resistance with an digital multimeter, DMM
Measuring resistance with a digital multimeter is easier and faster than making a resistance measurement with an analogue multimeter as there is no need to zero the meter. As the digital multimeter gives a direct reading of the resistance measurement, there is also no equivalent of the reverse reading found on the analogue multimeters.
There are a few simple steps required to make a resistance measurement with a digital multimeter:
- Select the item to be measured: This may be anything where the resistance needs to be measured and estimate what the resistance may be.
- Insert the probes into the required sockets Often a digital multimeter will have several sockets for the test probes. Insert these or check they are already in the correct sockets. Typically these might be labelled COM for common and the other where the ohms sign is visible. This is normally combined with the voltage measurement socket.
- Turn on the multimeter
- Select the required range The digital multimeter needs on and the required range selected. The range selected should be such that the best reading can be obtained. Normally the multimeter function switch will be labelled with the maximum resistance reading. Choose the one where the estimated value of resistance will be under but close to the maximum of the range. In this way the most accurate resistance measurement can be made.
- Make the measurement With the multimeter ready to make the measurement the probes can be applied to the item that needs to be measured. The range can be adjusted if necessary.
- Turn off the multimeter Once the resistance measurement has been made, the multimeter can be turned off to preserve the batteries. It is also wise to turn the function switch to a high voltage range. In this way if the multimeter is used to again for another type of reading then no damage will be caused if it is inadvertently used without selecting the correct range and function.
Digital multimeters are ideal pieces of test equipment for measuring resistance. They are relatively cheap and they offer a high level of accuracy and general performance.