Fluke BT521 Product Manual - Page 34

Battery Test Probes, Connect Test Probe to Battery

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BT521 Users Manual Battery Test Probes To connect test probes to the battery pole: 1. Use the inner tip of the test probe to touch the target surface. 2. Push the test lead to set-back the inner tip, until both the inner tip and the outer tip are fully connected to the target surface. This will ensure a proper 4-wire connection to the battery terminal. Note Stable and correct readings are shown only when both the inner tip and the outer tip of the test probe are fully connected to the battery posts. To get more accurate battery internal resistance reading, do not connect the test probes to screws. See Figure 3-2. Examine for open fuse before mΩ measurement by connecting the outer tips of both probes. If the mΩ reading changes from OL to dashes and then backs to OL, the fuse is good. If mΩ reading remains as OL, the fuse is open and needs a replacement. In this function, the voltage between the positive and negative poles of a battery must be < 60 V. A voltage >60 V causes the fuse to open. Small Hole Cylinder Screw Cube Circle Cylinder Clamp Strip Figure 3-2. Connect Test Probe to Battery hsz008.eps 3-8 MyFlukeStore Shop for Fluke products online at: www. .com 1.888.610.7664

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BT521
Users Manual
3-8
Battery Test Probes
To connect test probes to the battery pole:
1.
Use the inner tip of the test probe to touch the target surface.
2.
Push the test lead to set-back the inner tip, until both the inner tip and the outer tip
are fully connected to the target surface. This will ensure a proper 4-wire connection
to the battery terminal.
Note
Stable and correct readings are shown only when both the inner tip
and the outer tip of the test probe are fully connected to the battery
posts. To get more accurate battery internal resistance reading, do
not connect the test probes to screws. See Figure 3-2.
Examine for open fuse before m
Ω
measurement by connecting the
outer tips of both probes. If the m
Ω
reading changes from OL to
dashes and then backs to OL, the fuse is good. If m
Ω
reading
remains as OL, the fuse is open and needs a replacement.
In this function, the voltage between the positive and negative poles
of a battery must be < 60 V. A voltage >60 V causes the fuse to
open.
Small Hole
Cylinder Screw
Cube
Circle
Strip
Cylinder Clamp
hsz008.eps
Figure 3-2. Connect Test Probe to Battery
Shop for Fluke products online at:
1.888.610.7664
www.
MyFlukeStore
.com