Fluke 725 Manual do Utilizador descarregar pdf (Página 39)

Using Source Mode

In SOURCE mode, the calibrator generates calibrated

signals for testing and calibrating process instruments;

supplies voltages, currents, frequencies, and resistances;

simulates the electrical output of RTD and thermocouple

temperature sensors; and measures gas pressure from

an external source, creating a calibrated pressure source.

Sourcing 4 to 20 mA

To select the current sourcing mode, proceed as follows:

1. Connect the test leads in the mA terminals (left

column).

2. If necessary, press

M for SOURCE mode.

3. Press

V for current and enter the desired current

you want by pressing

X and W keys.

Simulating a 4- to 20-mA Transmitter

Simulate is a special mode of operation in which the

calibrator is connected into a loop in place of a

transmitter and supplies a known, settable test current.

Proceed as follows:

1. Connect the 24 V loop power source as shown in

Figure 14.

2. If necessary, press

M for SOURCE mode.

3. Press

V until both mA and SIM display.

4. Enter the desired current by pressing

X and W

keys.

Sourcing Other Electrical Parameters

Volts, ohms, and frequency are also sourced and shown

in the lower display.

To select an electrical sourcing function, proceed as

follows:

1. Connect the test leads as shown in Figure 15,

depending on the source function.

2. If necessary, press

Mfor SOURCE mode.

3. Press

V for dc voltage, or F for frequency or

resistance.

4. Enter the desired output value by pressing

X and

W keys. Press Y and Z to select a different digit to

change.

1 2 ... 34 35 36 37 38 39 40 41 42 43 44 ... 71 72

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Fluke 725 Manual do Utilizador Página 39

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