Fluke 725Ex FE 725ex Users Manual - Page 41

Using Source Mode, Sourcing 4 to 20 mA, Simulating a 4- to 20-mA Transmitter

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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). M 2. If necessary, press for SOURCE mode. 3. Press V for current and enter the desired current by pressing X and W keys. Press Y and Z to select a different digit to change. 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 12-V-loop-power source as shown in Figure 14. M 2. If necessary, press for SOURCE mode. 3. Press V until both mA and SIM display. Using Source Mode 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. M 2. If necessary, press for 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. 31

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Using Source Mode
31
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
by pressing
X
and
W
keys. Press
Y
and
Z
to select
a different digit to change.
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 12-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
M
for 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.