Fluke 726 FE 726 Users Manual - Page 34

Using Resistance-Temperature Detectors (RTDs), PRT Custom Curves

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726 Users Manual Using Resistance-Temperature Detectors (RTDs) The Calibrator accepts RTD types shown in Table 6. RTDs are characterized by their resistance at 0 °C (32 °F), which is called the "ice point" or R0. The most common R0 is 100 Ω. The Calibrator accepts RTD measurement inputs in two-, three-, or four-wire connections, with the three-wire connection the most common. A four-wire configuration provides the highest measurement precision, and two-wire provides the lowest measurement precision. To measure temperature using an RTD input: M 1. If necessary, press for MEASURE mode. 2. Press R for the RTD display. Continue pressing this key to select the desired RTD type. 3. Press X or W to select a 2-, 3-, or 4- wire connection. 4. Attach the RTD to input terminals as shown in Figure 11. PRT Custom Curves Up to three custom curves can be named and CVD coefficients can be entered through the serial port. Names can be up to six characters. For more information, see the Application Note on the 725/726 CD. 24

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726
Users Manual
24
Using Resistance-Temperature Detectors (RTDs)
The Calibrator accepts RTD types shown in Table 6.
RTDs are characterized by their resistance at 0 °C
(32 °F), which is called the “ice point” or R
0
. The most
common R
0
is 100
Ω
. The Calibrator accepts RTD
measurement inputs in two-, three-, or four-wire
connections, with the three-wire connection the most
common. A four-wire configuration provides the highest
measurement precision, and two-wire provides the lowest
measurement precision.
To measure temperature using an RTD input:
1.
If necessary, press
M
for MEASURE mode.
2.
Press
R
for the RTD display. Continue pressing
this key to select the desired RTD type.
3.
Press
X
or
W
to select a 2-, 3-, or 4- wire
connection.
4.
Attach the RTD to input terminals as shown in
Figure 11.
PRT Custom Curves
Up to three custom curves can be named and CVD
coefficients can be entered through the serial port. Names
can be up to six characters.
For more information, see
the Application Note on the 725/726 CD.