Fluke 287 Fluke 287 and 289 Multimeter Users Manual - Page 44

Using Conductance for High Resistance Tests, Conductance Measurement

Get Fluke 287 PDF manuals and user guides View all Fluke 287 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 44 highlights

287/289 Users Manual Using Conductance for High Resistance 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 Siemens (S). The meter's 50 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 is used to measure the resistance of components up to 100,000 MΩ, or 100,000,000,000 Ω (1 nS = 1,000 MΩ). To measure conductance, position the rotary switch to S and set up the Meter as shown in Figure 18. Move the menu selector to the menu item labeled Ohms,nS,j and press the softkey labeled nS. There is normally a residual conductance reading with the test leads open. To ensure accurate readings, press the softkey labeled Menu. Move the menu selector to the menu item labeled REL and press the softkey labeled REL to subtract the residual value with the test leads open. Note R is disabled when the Meter is measuring conductance. 34 8:10pm 06/13/07 26.55 nS Manual Range 0 10 20 30 40 50 nS Menu Save Setup est14.eps Figure 18. Conductance Measurement

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
287/289
Users Manual
34
Using Conductance for High Resistance 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 Siemens (S). The meter’s 50 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 is used to measure the resistance of components up to
100,000 M
Ω
, or 100,000,000,000
Ω
(1 nS = 1,000 M
Ω
).
To measure conductance, position the rotary switch to
S
and
set up the Meter as shown in Figure 18. Move the menu selector
to the menu item labeled
Ohms,nS,
j
and press the softkey
labeled
nS
.
There is normally a residual conductance reading with the test
leads open. To ensure accurate readings, press the softkey
labeled
Menu
. Move the menu selector to the menu item labeled
REL
and press the softkey labeled
REL
to subtract the residual
value with the test leads open.
Note
R
is disabled when the Meter is measuring
conductance.
Menu
26.55
nS
Save
Setup
Manual Range
50
nS
0
10
20
30
40
8:10pm
06/13/07
est14.eps
Figure 18. Conductance Measurement