Always Perform A Current Draw Test When:
- The test result from the :VAS6161 shows the following:
1 -Perform a current draw test
By checking a battery's current draw capacity during the charging procedure, it can be determined in a short time whether a partially discharged or severely discharged battery (refer to SEVERELY DISCHARGED BATTERIES ) can become operable again by further charging.
Test Prerequisites
- When charging a battery, the battery temperature must be at least ≥ +10 °C (+50 °F).
- The charger must be able to deliver at least 30 A charge current, for example as on the battery chargers :VAS5095A , :VAS5900 and :VAS5903 .
- When charging using the :VAS5095A , the battery current draw must be measured with a current probe, for example, :VAS6356/4A . The :VAS5900 and the :VAS5903 indicate the current draw on the device. The :VAS5900 automatically performs the menu- guided current draw test.
-- Connect the battery to the battery charger and start the charging process.
-- Measure the battery charge current after five minutes.
Test Result
When current draw A is greater than 10% of nominal capacity Ah (for example, > 6.1 A at 61 Ah battery), fully charge the battery and retest.
On the Eos with two 6V AGM batteries, the charge current must only be greater than 5% of the battery nominal capacity in amp. As an example for Eos: the 50 Ah battery must have a charge current greater than 2.5 A after charging for five minutes.
-- Charge the battery completely when the charge current is greater than 10% of the nominal capacity (note exception for Eos in the note above).
-- After resting the battery for two hours, perform a battery test. Refer to BATTERY TEST, PERFORMING USING Battery Tester .
If the charge current is less than 10% of the nominal capacity (two 6 V batteries in the Eos 5%) five minutes after starting the test (that is, for a 50 Ah battery < 5A), then replace the battery. Fill out the battery check sheet for warranty and goodwill cases.