The Megger BITE 3 battery impedance tester measures key parameters for assessing the condition of lead-acid batteries with a capacity of up to 2,000 amp-hours. The measured values include cell impedance, cell voltage, and cell junction resistance. Additionally, the BITE 3 performs an internal ohmic test.

For the first time in a device of this kind, the BITE 3 also measures trickle charge current and superimposed AC current. An integrated spectrum analyzer displays the harmonic content of the AC current. The device’s firmware is internet-capable and can be updated; it also supports multiple languages.

The BITE 3 is particularly user-friendly, making it ideal for the regular inspection of lead-acid batteries. It measures internal impedance, junction resistance, cell voltage, as well as trickle charge current and ripple current. These values, together with temperature, specific gravity, and other battery parameters, enable a comprehensive assessment of battery condition—from terminal to terminal—and, to some extent, of the charger (specifically, the superimposed AC current and its harmonic components).

Megger recommends incorporating the BITE 3 as part of a comprehensive battery maintenance program:

• For lead-acid batteries, a semi-annual inspection is advisable,
• For VRLA batteries, a quarterly check is recommended.

Overall, the BITE 3 is among the easiest and most reliable devices for monitoring batteries and chargers.

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