Fluke 744 — руководство пользователя по режиму источника и параметрам [56/138]

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744

Users Manual

Using Source Mode

The operating mode (i.e., MEASURE, SOURCE) is

shown in a reverse-video bar on the display. If the

calibrator is not in SOURCE mode, press M until

SOURCE is shown. You must be in SOURCE mode

to change any of the SOURCE parameters.

Sourcing Electrical Parameters

To select an electrical sourcing function, proceed as

follows:

1. Connect the test leads as shown in Figure 16,

depending on the source function.

2. Press M for current, v for dc voltage, h

for frequency, or q for resistance.

3. Enter the desired output value, then press

e. For example, to source 5.0 V dc, press

v 5 . 0 e.

Note

If you are sourcing frequency, respond to the

display prompt to select a zero-symmetric

sine or positive square wave. The amplitude

you specify is p-p amplitude.

4. To change the output value enter a new value

and press e.

Note

If you are sourcing current, wait for the

symbol to go out before you use the output.

5. To set the output value to 0 in the present source

function, press c.

6. To turn off sourcing completely, press c twice.

Note

Use the source current function to drive a

current loop. This is different than the loop

power function in which the calibrator is

powering a process instrument. To source

loop power, use the

Loop Power

function

accessible from Setup mode.