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Page Title:
Figure 1-3. Testing Battery with Hydrometer |
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 TM 10-3930-644-14 & P
of batteries constructed in this manner are
obtained by pressing the prod points through the
sealing compound and contacting the cell
connectors. After the test is made, the pierced
sealing compound should be pressed back in
place.
Figure 1-4. Testing Battery with Voltmeter
CAUTION
It is not recommended that a
voltmeter be used to test batteries
Figure 1-3. Testing Battery with Hydrometer
with buried connectors, unless the
user is certain of the proper cell
2. Use of a Voltmeter
connectors.
If through error, the
voltmeter contacts two or more cells,
Voltmeters designed for testing storage batteries
there is a possibility it will be
have scale ranges suitable for testing individual
damaged.
cells. Some are equipped with prod contacts
which are properly spaced to bridge a battery
3. Test After Activation
cell. Readings are obtained by pressing the
prod points firmly into the post or cell connectors
The dry charge battery may be put into service
of each cell and observing the position of the
immediately after activating.
voltmeter pointer with respect to the scale. The
proper polarity must be observed, the red prod
To assure good battery performance, the
makes contact with positive post, the black prod
following activation tests are recommended.
a negative post.
a. Five minutes after adding electrolyte
NOTE
check the open circuit voltage. More than
A cell connector must be regarded as
6 volts or more than 12 volts, depending
positive when testing one cell, and
upon the rated voltage, indicates the
negative when testing the adjoining
battery is ready for service. From 5 to 6
cell. (The cell connector connects
volts or from 10 to 12 volts indicates
the positive post of one tell with the
oxidized negative charge, and the battery
negative post of an adjoining cell.)
should be recharged before use. Less
than 5 or less than 10 volts depending on
Some batteries are made with buried cell
the rated voltage, indicates a reverse cell
connectors, which are covered with sealing
or an open circuit and the battery should
compound. Voltage readings
be replaced. Refer to Paragraph 2, this
Section, pertaining to the use of voltmeter.
R-146-1
3-75
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