Temperature
This section describes how to configure 2-wire and 4-wire temperature measurements from the front panel.
Step 1: Configure the test leads as shown.
2-wire Temperature:
4-wire Temperature:
Step 2: Press [Temp] on the front panel. The following menu appears. Note that the Auto Zero softkey only applies
to 2-wire measurements.
Step 3: Press Probe and choose the probe type. If you choose to use an RTD, the menu will have a softkey to specify
the RTD's resistance at 0 degrees Celsius (R
0
).
Step 4: Specify whether you want to use Auto Zero. Autozero provides the most accurate measurements, but
requires additional time to perform the zero measurement.
With autozero enabled, 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 measurement accuracy. With autozero disabled, the DMM measures the offset once and subtracts the offset
from all subsequent measurements. The DMM takes a new offset measurement each time you change the function,
range, or integration time.
Step 5: Press Aperture and choose the number of power-line cycles (PLCs) to use for the measurement. Only 1, 10,
and 100 PLC provide normal mode (line frequency noise) rejection. Selecting 100 PLC provides the best noise rejection
and resolution, but the slowest measurements.
Step 6: Use the Units softkey to display temperature in degrees Celsius, degrees Fahrenheit, or Kelvin.
Agilent Truevolt Series DMM Operating and Service Guide 45
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