WPG MRPTHD1211LAC, Operating Instructions Manual

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MRPTHD-AC: #35066 Rev 1.0/2-21 18
3)
3A
Make sure all vacuum pads will fit on the
load and will be loaded evenly (fig. 3A).
Consult the Per-Pad Load Capacity.
4) Place the vacuum pads in contact with the
load surface until they begin to seal.
1
Reading the Vacuum Gauge
A vacuum gauge shows the current vacuum level in positive inches of Hg and negative kPa:
•
1B 1C
Green range (>16" Hg [-54 kPa]): Vacuum level is
sufficient to lift the maximum load weight (fig.
1B).
• Red range (<16" Hg [-54 kPa]): Vacuum level is not
sufficient to lift the maximum load weight (fig.
1C).
If it takes more than 5 seconds for the vacuum level to
reach 5" Hg [-17 kPa], press on any vacuum pad that has not yet sealed.
Once the pads have sealed, the lifter should be able to maintain sufficient vacuum for lifting,
except when used above the maximum Operating Elevation.
2
If it does not, perform the
“Vacuum Test” on page 27.
Do not disconnect
control pendant.
Note: Disconnecting the movable control pendant during lifter
operation is likely to result in a load release and personal injury.
1..... Although a vacuum pad may become distorted during shipping or storage, this condition should correct itself with continued use.
2..... If the lifter is used above the maximum Operating Elevation (see “SPECIFICATIONS” on page 3), it may not be able to maintain sufficient vacuum
for lifting. Contact WPG for more information.
OPERATION