Product Manual

Use the Product
Make Measurements 3
3-7
Make Measurements
Test Battery Internal Resistance and Voltage
The Product can simultaneously test the internal resistance and voltage of a battery.
This helps you to understand the overall state of the battery health.
To test battery internal resistance and voltage, turn the rotary switch to mΩ. See
Figure 3-1.
AB CD
hpo018.eps
Figure 3-1. Test Battery Internal Resistance and Voltage
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.