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Model 88 V
Users Manual
54
Measuring System Voltage
Bleed the surface charge from the battery by turning the
headlights on for 1 minute. Measure the voltage across
the battery terminal with the lights off. When possible,
individual cell specific gravity should be checked with a
hydrometer. A load test should be done to indicate battery
performance under load. Voltage tests only tell the state
of charge, not the battery condition. To measure system
voltage:
1. Insert test leads in the input terminals shown in
Figure 18.
2. Set the switch to
V.
3. Turn on lights for 1 minute to bleed off surface
charge.
4. Turn lights off and touch probes to circuit.
5. Read the display. A fully charged battery typically
shows about 12.6 V. See other typical values in
Table 9.
Table 9. Battery Charge Voltages
Voltage % Charge
12.60 to 12.72 V 100
12.45 V 75
12.30 V 50
12.15 V 25
Readings obtained at 80 °F (27 °C)
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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