Wood’s Powr-Grip MRPT89DC - Manual (Page 20)

Rev 24.0/12-13 18 MRPT89DC: #35062
B
ATTERY
T
EST
The lifter is equipped with a battery gauge to help the operator evaluate
whether the battery has adequate energy for lifting. Factors such as the
condition of the battery, the time required to execute a lift, and the
porosity of the load combine to determine how much battery energy is
needed. It is the operator’s responsibility to evaluate these
conditions and to make sure the battery has sufficient energy to
complete a lift safely. Check the battery energy before every lift and
also at the end of each day's use, to decide whether a charge is needed
(see B
ATTERY
R
ECHARGE
to follow). 10 Never use the lifter when battery
energy registers lower than 50% (that is, when only red lights are illuminated), regardless of the
estimated energy requirement.
WARNING: Never use lifter if battery energy is lower than 50% of capacity.
When the power switch is in the ON ( ) position and the apply/release switch is in the neutral
(center) position, the operator must press the battery test button for a few moments to make the
energy level register on the battery gauge. This enables the operator to check the battery
energy while the lifter is powered up but
not attached to a load.
When the power switch is in the ON ( ) position and the apply/release switch is in the
“APPLY” (right) position, the battery gauge automatically monitors the energy level of the
battery. This enables the operator to check the battery energy while the lifter is powered up and
attached to a load. However, the battery gauge shuts off temporarily while the vacuum pump is
running, to prevent an inaccurate reading. When the pumping cycle is completed, the battery
gauge requires a few moments to stabilize before it displays an accurate energy reading again.
Note: If the lifter has not been used since the battery was charged, the battery gauge may
falsely indicate an energy level that is higher than actual, due to a “surface charge” on the
battery. After the pump runs for approximately one minute, the surface charge dissipates,
allowing the operator to take an accurate energy reading.
10
The battery charger must be disconnected from its AC power source in order to test the battery energy; otherwise, the energy
reading on the battery gauge would not be accurate.