Fluke 725 Manual do Utilizador descarregar pdf (Página 33)

Using Measure Mode

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

. The most common R

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, proceed as

follows:

1. If necessary, press

M for MEASURE mode.

2. Press

R for the RTD display. If desired, 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.

5. If necessary, you can toggle between °C or °F

temperature units by pressing

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 71 72

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Fluke 725 Manual do Utilizador Página 33