80 Series III
Users Manual

70/73 English Instruction Sheet Page 1 ® 70/73 Series III Multimeter Instruction Sheet W Read First: Safety Information To ensure that the meter is used safely, follow these instructions:. Never use the meter if the meter or test leads look damaged. Be sure the test leads and rotary switch are in the correct position for the desired. Tektronix offers quality calibration services for over 140,000 instruments including the FLUKE 70 III. We offer a variety of calibration service levels including ANSI Z540.1 and ISO/IEC 17025 Accredited. Our nationwide network of labs are ISO 9001 certified and ISO 17025 accredited by A2LA.

18

Using Conductance for High Resistance or
Leakage Tests

Conductance, the inverse of resistance, is the ability of a
circuit to pass current. High values of conductance
correspond to low values of resistance.

The unit of conductance is the Siemen (S). The meter’s
40 nS range measures conductance in nanosiemens
(1 nS = 0.000000001 Siemens). Because such small
amounts of conductance correspond to extremely high
resistance, the nS range lets you determine the
resistance of components up to 100,000 M

Ω

, or

100,000,000,000

Ω

(1/1 nS = 1,000 M

Ω

).

Fluke 70 Iii Multimeter

To measure conductance, set up the meter as shown for
measuring resistance (Figure 4); then press

K

until

the nS indicator appears on the display.

The following are some tips for measuring conductance:

•

High-resistance readings are susceptible to electrical
noise. To smooth out most noisy readings, enter the
MIN MAX recording mode; then scroll to the average
(AVG) reading.

•

There is normally a residual conductance reading
with the test leads open. To ensure accurate
readings, use the relative (REL) mode to subtract the
residual value.

Measuring Capacitance

Caution

Fluke 70 Ii Multimeter User Manual

To avoid possible damage to the meter or to
the equipment under test, disconnect circuit
power and discharge all high-voltage
capacitors before measuring capacitance.
Use the dc voltage function to confirm that
the capacitor is discharged.

Capacitance is the ability of a component to store an
electrical charge. The unit of capacitance is the farad (F).
Most capacitors are in the nanofarad to microfarad range.