Megger BITE 3 User Manual

Interpreting Test Results
AVTMBITE 3 Rev 8 April 2014
25
Short-term Mode of Analysis
In some cases, previous data were taken but doesn’t start at battery
commissioning. In this scenario, a comparison between each cell and its previous
measurement, called percent change, aids in determining its condition.
Additionally, use the deviation as an additional piece of information to get a
better determination of the condition of the string. See the Relative Limits chart
for guidelines for allowable percent change.
Long-term Trending
When data have been taken since commissioning, trending is the best mode of
analysis. This mode combines the trend over time, the percent change and
percent deviation provides the most information about a battery’s state-of-health.
See the Relative Limits chart for guidelines.
Relative Limits Chart
Percent
Variation
from
String
Average
Percent
Variation
from
String
Average
Percent
Deviation
from
Baseline
Percent
Deviation
from
Baseline
Warning Alarm Warning Alarm
Lead-acid, Flooded
15 30 30 50
Lead-acid, VRLA, AGM
10 30 20 50
Lead-acid, VRLA, Gel
20 30 30 50
NiCD, Flooded
10 20 15 30
NiCD, Sealed
10 20 15 30
Inter-cell Connections (Straps)
15 20
NOTE: The BITE2 is recommended for NiCD battery testing.

Megger BITE 3 Specifications

General

Brand	Megger
Model	BITE 3
Category	Test Equipment
Language	English