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The following mathematical functions are available for the HDM3000:
Null
DB/dBm scaling
statistics
limit
Mathematics - Null function
A null reading is a value that is subtracted from all subsequent measurements. This
value is specific to the current function, even when you exit the function and return to
use it.
A common use of this function is to remove lead resistors from resistance
measurements. To do this, simply short-circuit the test lead and press [Null].For other
measurement functions, place the probe into the null value circuit before pressing
[Null].
You can also specify a null Value by pressing [Math], changing the first soft key to
Value, and using the arrow key to enter the value. To turn off null function, press [Null]
again, or press [Math], and then set the first soft key to OFF.
Mathematical operations - dB/dBm scaling
The DB and DBM scaling functions are only applicable to ACV and DCV
measurements. With this function you can make scaling measurements
relative to the reference values.
When you change the measurement function (for example, from DCV to
ACV), the scaling is set to OFF.You must re-enable scaling after changing the
measurement function.
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