Testing Continuity; Measuring Pressure - Fluke 744 User Manual

744
Users Manual
Note
When measuring frequency, you are
prompted to select a frequency range. If you
expect the frequency you are measuring to
be below 20 Hz, press
lower frequency range, then press
2. Connect the test leads as shown in Figure 10,
depending on the measurement function.

Testing Continuity

When testing continuity, the beeper sounds and the
word appears on the display when the
Short
resistance between the
common jack is less than 25 . The word
appears when the resistance is greater than 400 .
Proceed as follows to test continuity:
1. Remove power from the circuit to be tested.
2. If necessary, press
3. Press twice so that
4. Connect the calibrator to the circuit to be tested
as Figure 10 shows.
30
to select the
.
MEAS jack and its
Open
for MEASURE mode.
appears.
Open

Measuring Pressure

Many ranges and types of pressure modules are
available from Fluke. See "Accessories" near the
back of this manual. Before you use a pressure
module, read its Instruction Sheet. The modules
vary in how you use them, how you zero them, what
types of process pressure media are allowed, and
accuracy specification.
Figure 11 shows gage and differential modules.
Differential modules also work in gage mode by
leaving the low fitting open to atmosphere.
To measure pressure, attach the appropriate
pressure module for the process pressure to be
tested as described in the module's Instruction
Sheet.
Proceed as follows to measure pressure:
Warning
To avoid a violent release of pressure in
a pressurized system, shut off the valve
and slowly bleed off the pressure before
you attach the pressure module to the
pressure line.