Ezgo MPT 1000 48V, Руководство пользователя

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Owner’s Guide
Page 63
MAINTENANCE PROCEDURES
Read all of this manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notices, Cautions, Warnings, and Dangers.
Do not perform a hydrometer test on a battery that has just been watered. The battery must go through at least one charge
and discharge cycle in order to permit the water to adequately mix with the electrolyte.
The temperature of the electrolyte is important since the hydrometer reading must be corrected to 80° F (27° C). High
quality hydrometers are equipped with an internal thermometer that will measure the temperature of the electrolyte and will
include a conversion scale to correct the float reading. It is important to recognize that the electrolyte temperature is signifi-
cantly different from the ambient temperature if the vehicle has been operated.
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 bat-
tery 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.
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 elec-
trolyte 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 reading 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
readings (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
battery providing all cells are within fifty points of each other.
Since the hydrometer test is in response to a vehicle exhibit-
ing 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 battery of the same brand, type and approximate age.
BATTERY CHARGER MAINTENANCE
Plug charger into vehicle receptacle and wait for relay to turn
on. Check to see if charger turns off by moving plug back and
forth in receptacle. If charger does turn off, check plug for a
broken red wire in DC cord.
NOTICE
Hydrometer Temperature Correction