RIGOL DM3068 - Manual (Page 77)

Chapter 2 Front Panel Operations RIGOL
User’s Guide for DM3068 2-35
RTD
RTD is a temperature detector commonly used in medium-low temperature range.
It features in high measurement accuracy and stable performance. It measures
the temperature depending on the changing resistance of the measured substance
with the temperature. The multimeter will display the temperature corresponding
to the resistance when the resistance changes. This kind of sensor has good
linearity.
The multimeter adopts the approximate arithmetic of IEC751 standards and
converts the resistance signal from the temperature sensor into the related
temperature for displaying. For the reference table about each RTD, please refer to
the related standards.
To use the RTD sensor, set the measurement parameters according to the
following steps.
1. Set the R0 Value
Press RTD  R0 and enter a desired value within 49 Ω and 2100 Ω using the
direction keys, the default is 100 Ω.
2. Set the Temperature Coefficient
Press RTD  ALPHA and select a desired value from 385 (0.00385), 389
(0.00389), 391 (0.00391) and 392 (0.00392).
3. Set the Connection Type
The RTD lead usually uses 2-wire or 4-wire connection. Press RTD and then
press 2WR or 4WR to select the desired option; then, press
to return to
the upper-level menu.