Using Hydrometer - Cushman HAULER 1200X E Manuel De L'utilisateur

MAINTENANCE
Read all of this manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notices, Cautions, Warnings, and Dangers.
Using A Hydrometer
1. Draw electrolyte into the hydrometer several times to permit
the thermometer to adjust to the electrolyte temperature and
note the reading. Examine the color of the electrolyte. A
brown or gray coloration indicates a problem with the battery
and is a sign that the battery is nearing the end of its life.
2. Draw the minimum quantity of electrolyte into the hydrometer
to permit the float to float freely without contacting the top or
bottom of the cylinder.
3. Hold the hydrometer in a vertical position at eye level and
note the reading where the electrolyte meets the scale on
the float.
5
4. Add or subtract four points (.004) to the reading for every 10°
F (6° C) the electrolyte temperature is above or below 80° F
(27° C). Adjust the reading to conform with the electrolyte
temperature, e.g., if the reading indicates a specific gravity of
1.250 and the electrolyte temperature is 90° F (32° C), add
four points (.004) to the 1.250 which gives a corrected read-
ing of 1.254. Similarly if the temperature was 70° F (21° C),
subtract four points (.004) from the 1.250 to give a corrected
reading of 1.246.
5. Test each cell and note the readings (corrected to 80° F or
27° C). A variation of fifty points between any two cell read-
ings (example 1.250 - 1.200) indicates a problem with the
low reading cell(s).
As a battery ages the specific gravity of the electrolyte will
decrease at full charge. This is not a reason to replace the bat-
tery providing all cells are within fifty points of each other.
Since the hydrometer test is in response to a vehicle exhibiting
a performance problem, the vehicle should be recharged and
the test repeated. If the results indicate a weak cell, the battery
or batteries should be removed and replaced with a good bat-
tery of the same brand, type and approximate age.
5 - 20
Hydrometer Temperature Correction