Resistance
Guard Terminal
When measuring resistance of devices,it is important to know
that there are two types or ways of measurement.One type is DC
resistance measurement. Another type is AC resistance
measurement.The LCR meter provide both of types for
measurement.When measuring a resistive component that is
designed to be measured with DC, readings will be incorrect or
inaccurate.Before using the meter to measure resistance,please
verify whether the DUT (device under test) requires DC or AC
resistance measurement method. Depending on the method,results
will vary greatly.
One of the input sockets and terminals is labeled as "GUARD".
This terminal does not have to be used in all instances for the
meter to make measurements.But in some instances,it is very
useful.Guard terminal generally serves two purposes.
If user is using test leads, the guard terminal can be used to
connect to the shielding of the test leads.Doing so can be useful
when making large resistive component measurements.For example,
when measuring a 10 M
7-4
Ω resistor with test leads,at the high
range the reading may seem to be unstable as a few digits may
continuously be changing.Having the shield of the test leads
connected to the guard terminal will help stabilize the reading in
some instances.
Guard terminal is also used to minimize noise and to help
minimize parasitic effects coming from the component to be
measured, thus allowing high precision results.
23
Dual Display LCR Meter Instruction Manual
To Next Page
Loading...
Need help?
General
