Fluke 1586A/2DS Product Manual - Page 49

Wire and 4-Wire Sense Input Configuration

Get Fluke 1586A/2DS PDF manuals and user guides View all Fluke 1586A/2DS manuals
Add to My Manuals
Save this manual to your list of manuals

Page 49 highlights

1586A Users Manual 3-Wire and 4-Wire Sense Input Configuration For improved resistance measurement accuracy, the Product can connect to 3-wire (PRT only) and 4-wire instruments with sense connections. Sense connections cancel out the resistance of the test lead or wire and significantly improves the accuracy of the measurement. As shown in Table 3-1, many thermistors, platinum-resistance thermometers (PRTs) and resistors use a 3-wire or 4-wire sense connection to eliminate lead wire resistance errors. For 2-wire measurements, the wires can be connected to either the source or sense channels ChX01 through ChX20. For 3-wire or 4-wire resistance measurements, the source wires must be connected to channels ChX01 through ChX10 and the sense wires to the set of terminals directly across from where the source is connected (channels ChX11 through ChX20). Note The Product will not show or let the user select a 3-wire or 4-wire input on channels ChX11 through ChX20. Figure 3-3 shows an example of a 4-wire input (PRT) with sense wires connected to the Input Module, then how it would look in the Channel Setup menu once it is properly configured. To use the sense connections, the channel connected to the source wires must be configured as a 3-wire or 4-wire input as described in "Channel Configuration Procedures" on page 3-10. When a channel is configured as a 3-wire or 4-wire input, the Product automatically reserves the sense channel across from the source that prevents the channel from being independently configured, as shown in Figure 3-3. 3-6 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664

  • 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
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
1586A
Users Manual
3-6
3-Wire and 4-Wire Sense Input Configuration
For improved resistance measurement accuracy, the Product can connect to 3-wire (PRT
only) and 4-wire instruments with sense connections.
Sense connections cancel out the resistance of the test lead or wire and significantly
improves the accuracy of the measurement. As shown in Table 3-1, many thermistors,
platinum-resistance thermometers (PRTs) and resistors use a 3-wire or 4-wire sense
connection to eliminate lead wire resistance errors.
For 2-wire measurements, the wires can be connected to either the source or sense
channels ChX01 through ChX20. For 3-wire or 4-wire resistance measurements, the
source wires must be connected to channels ChX01 through ChX10 and the sense wires
to the set of terminals directly across from where the source is connected (channels
ChX11 through ChX20).
Note
The Product will not
show or let the user select a 3-wire or 4-wire input on
channels ChX11 through ChX20.
Figure 3-3 shows an example of a 4-wire input (PRT) with sense wires connected to the
Input Module, then how it would look in the Channel Setup menu once it is properly
configured.
To use the sense connections, the channel connected to the source wires must be
configured as a 3-wire or 4-wire input as described in “Channel Configuration
Procedures” on page 3-10. When a channel is configured as a 3-wire or 4-wire input, the
Product automatically reserves the sense channel across from the source that prevents the
channel from being independently configured, as shown in Figure 3-3.
Shop for Fluke products online at:
1.888.610.7664
www.
MyFlukeStore
.com