Measuring resistance, Figure 3-4. dc voltage measurement – Fluke 189 User Manual

Page 42

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Model 187 & 189
Users Manual

3-6

MIN MAX

HOLD

REL

%

ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

MIN MAX

HOLD

REL

%

ms

Hz

RANGE

dB

dB

ac+dc

ac+dc

ac+dc

ac+dc

F

nS

mA

mA

A

mV

V

mV

V

OFF

C

A

A

A

A

mA

COM

V

TEMPERATURE

A

AutoHOLD

LOGGING

SAVE

CANCEL

FAST MN MX

SETUP

YES

NO

1000V

400mA
FUSED

10A MAX

FUSED

CAT

CLEAR MEM

VIEW

+

ac+dc

V

ac+dc

V

LOGGING MULTIMETER

189

ach002f.eps

Figure 3-4. DC Voltage Measurement

Measuring Resistance

Caution

To avoid possible damage to the meter or to
the equipment under test, disconnect circuit
power and discharge all high-voltage
capacitors before measuring resistance.

Resistance is an opposition to current flow. The unit of
resistance is the ohm (

). The meter measures resistance

by sending a small current through the circuit.

The meter’s resistance ranges are 500.00

, 5.0000 k

,

50.000 k

, 500.00 k

, 5.0000 M

, 30.000 M

, and

500.0 M

.

To measure resistance, set up the meter as shown in
Figure 3-5.

All pushbutton functions are available with resistance
measurements. The blue key cycles to continuity and
conductance measurement, which are described later in
this chapter.

Note

In the Ohms Mode, a negative sign (-) on the
display indicates the presence of voltage. This
will cause reading errors.

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