Teledyne T3DMM6-5, Руководство пользователя

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3. Set the range
Press
【
Range
】
to select a range for the measurement. You can also use
the , , and keys on the front panel to select the range. Auto
(autorange) automatically selects the range for the measurement based on
the input. Autoranging is convenient, but it results in slower measurements
than using a manual range. Autoranging goes up a range of 110% of the
present range, and changes down a range when the measurement is
below 10% of the present range.
4. Set the Integration
Press
【
Aperture
】
and choose the number of power-line cycles (PLCs) to
use for the measurement. Selecting 100PLC provides the best noise
rejection and resolution, but the slowest measurements.
5. Autozero setting
Press
【
Auto Zero
】
to enable or disable this function. Autozero provides
the most accurate measurements, but requires additional time to perform
the zero measurement. With autozero enabled (On), the DMM internally
measures the offset following each measurement. It then subtracts that
measurement from the preceding reading. This prevents offset voltages
present on the DMM’s input circuitry from affecting the measurement
accuracy.
6. Specify the DC input impedance (Only for Manual 200mV, 2V and
20V ranges)
Press
【
Input Z
】
to set the DC resistance as “10M” (default value)
or 10G”. Users can execute the DC voltage measurement directly without
modifying this parameter if they wish.