WPG MR1611LDC, Инструкция по эксплуатации

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Rev 34.7/3-20 16 MR1611LDC: #35050
Reading the Vacuum Gauge
The vacuum gauge indicates the current vacuum level in the lifter’s vacuum system. The
green
range indicates vacuum levels sufficient for lifting the maximum load weight, whereas the
red
range indicates vacuum levels that are
not sufficient for lifting the maximum load weight. The
gauge needle should show a sudden surge in vacuum as the vacuum pads seal against the load.
If it takes more than 5 seconds for the vacuum level to reach 5" Hg [-17 kPa], press on any pad
that has not yet sealed.
Vacuum Level on Optimal Surfaces
When the lifter is attached to clean, smooth, nonporous load surfaces, it should be able to
maintain a vacuum level in the green range on the vacuum gauge, except when used at high
elevations (see SPECIFICATIONS: Operating Elevation). If not, make sure the vacuum switch is
adjusted correctly (see MAINTENANCE: V
ACUUM
S
WITCH
A
DJUSTMENT
). If the vacuum switch
cannot be adjusted to maintain a vacuum of 16" Hg [-54 kPa], perform the V
ACUUM
T
EST
(see
MAINTENANCE) to determine whether there is a deficiency in the vacuum generating system.
Vacuum Level on Other Surfaces
When the lifter is attached to contaminated, rough or porous load surfaces, it may not be able to
maintain a vacuum level in the green range on the vacuum gauge, due to leakage in the seal
between the vacuum pads and the load surface. 9 In the case of contamination, thoroughly clean
the contact surfaces of the load and the vacuum pads (see MAINTENANCE: V
ACUUM
P
AD
M
AINTENANCE
: Cleaning), and reattach the lifter to the load. If the load has rough or porous
surfaces,
the operator must conduct a test to determine whether the lifter is designed
to lift the load, as follows:
1) Make sure the lifter's vacuum generating system is functioning correctly (see MAINTENANCE:
V
ACUUM
T
EST
).
2) Attach the vacuum pads to the load as previously directed.
3) After the vacuum pumps stop running, place the power switch in the “off” ( ) position.
4) Raise the load a minimal distance, to confirm that it is supported by the lifter.
5) Monitor the vacuum gauge while the load is suspended for 5 minutes:
The lifter must
maintain a minimum vacuum level of 10" Hg [-34 kPa] during this time. If not, the
load does not possess the characteristics required for use with this lifter. 10
9
Contaminated loads can also cause the vacuum pumps to run frequently or continuously. Since excessive pumping quickly
reduces battery energy, the operator should clean the load when possible, to minimize pumping.
10
Certain load materials are too rough or porous to allow the vacuum pads to form a seal that can be maintained for 5 minutes
without power. However, in geographical locations where CE Standards do not apply, it may be possible to use the lifter to lift
such loads. Contact Wood’s Powr-Grip for more information.