WPG MRPTHD1211LAC, Operating Instructions Manual

Page: 28 / 42

MRPTHD-AC: #35066 Rev 1.0/2-21 26
T
ESTING
Perform the following test to determine whether or not a load surface is too porous or rough:
Lifter/Load Compatibility Test
1
1) Make sure the vacuum generating system is functioning correctly (see “Vacuum Test” on
page 27).
2) Thoroughly clean the load surface and the vacuum pads (see “Pad Cleaning” on page 30).
3) Place the load in the upright position on a stable support.
4) Attach the vacuum pads to the load as previously directed.
5) After the vacuum level appears in the green range on the vacuum gauge, place the power
switch in the “off” position ( ).
6)
Take precautions in case
load should fall during test.
Raise the load a minimal distance, to make sure it
is supported by the lifter.
7) Watch the vacuum gauge: Starting from a
vacuum level of 16" Hg [-54 kPa], the lifter must maintain a vacuum level greater than
12" Hg [-41 kPa] for 5 minutes.
2
If not, lifting this load requires additional precautions
(eg, a load sling). Contact WPG for more information.
8) Lower the load after 5 minutes or before the vacuum level diminishes to 12" Hg [-41 kPa].
1..... The “Pad-to-Load Friction Coefficient” (see page 29) can affect the outcome of this test.
2..... Under CE requirements, the lifter must maintain a vacuum level greater than 8" [-27 kPa] .
INSPECTIONS AND TESTS