Wood’s Powr-Grip P2110445DC - Manual (Page 22)

Rev 22.0/5-13 20 P2-04-DC: #35113
B
ATTERY
R
ECHARGE
Only use a battery charger supplied by or approved by Wood's Powr-Grip; other chargers may
reduce battery life. Charge the battery as soon as possible after any extended use of the lifter,
or whenever the battery gauge indicates diminished energy (see B
ATTERY
T
EST
preceding).
Temperatures above 70° Fahrenheit [21° Celsius] require the battery to be charged more
frequently.
CAUTION: Charge the battery only while the valve handle is in “RELEASE” position
(power OFF). Operating the lifter when the charger is connected to an AC power source could
result in permanent damage to the charger.
Identify the input voltage marked on the battery charger, and plug it in to an appropriate power
source. 10 The power source must be equipped with a ground fault circuit interrupter, in order to
reduce the risk of electrical shocks.
WARNING: Power source must be equipped with ground fault circuit
interrupter.
Usually a battery takes no more than 16 hours to charge completely, after which the charger
shuts off automatically. The blue light on the battery gauge also turns on, to indicate that the
battery is fully charged. Following long-term use, a battery gradually loses capacity. Replace it
whenever the operating time between recharging is no longer satisfactory.
B
ATTERY
C
HARGER
T
EST
Perform this test only when the battery is not fully charged (see B
ATTERY
T
EST
preceding). While
the valve handle is in the “RELEASE” position (power off ) and the battery charger is disconnected
from any AC power source, use the battery test button to take an energy reading on the battery
gauge. Then plug the charger in to an appropriate AC power source and allow a few moments
for the battery gauge to show an accurate energy reading. If the charger is functioning
correctly, the energy reading should be higher when the charger is plugged in.
V
ACUUM
P
AD
M
AINTENANCE
Friction Coefficient
The friction coefficient represents the lifter's ability to resist load slippage when the load is
oriented in any position except horizontal. If the contact surfaces of either the load or the
vacuum pads are not clean, dry and in good condition, slippage is more likely to occur.
The Load Capacity of most Powr-Grip lifters is based on a friction coefficient of 1 (only Flat Lifters
are exempt from this requirement). However, a vacuum pad's ability to maintain this friction
coefficient is reduced by factors such as contamination, wear, age and exposure to sunlight, as
well as the condition of the load's contact surface (see INTENDED USE: L
OAD
C
HARACTERISTICS
).
Pads that have surface contamination must be thoroughly cleaned (see Cleaning discussion to
follow). Over time, the rubber in a pad may experience hardening or leaching of chemicals,
10
Any external power supply must conform to all applicable local codes.