Wood’s Powr-Grip MRT49DC2 - Manual (Page 32)

Rev 0.5/4-14 30 MRT4-DC2: #35071
3) After the vacuum pump stops running, place the lifter's power switch in the OFF ( )
position.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Hold the load for 5 minutes. The load must not slip or fall during this time period. If it does,
conduct a V
ACUUM
T
EST
and inspect each vacuum pad as indicated under V
ACUUM
P
AD
M
AINTENANCE
: Pad Inspection (see sections to follow). Correct any deficiency that is found and
retest the lifter.
B
ATTERY
T
EST
A battery gauge enables you to evaluate whether the battery has
adequate energy for lifting. 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). 21
Never use lifter if battery energy is lower than 50% of
capacity (only red lights illuminated).
While the lifter's power switch is in the ON ( ) position, the battery
gauge automatically monitors battery energy (provided that the lifter is not in stand-by mode).
22
While the lifter's power switch is in the OFF ( ) position (or the lifter is in stand-by mode), the
battery energy can be checked manually using the battery test switch. 23
Note: If the battery loses power, the power loss warning buzzer will sound an alarm (see P
OWER
L
OSS
W
ARNING
B
UZZER
T
EST
to follow).
21
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.
22
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.
23
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.