Richard, Haven’t seen much response on this.
A couple of points from me tho.
IEC 60950 has had stability requirements for racks for years
which is intended to include moving the rack. They include a 10 deg tip test
requirement which dictates how the rack is loaded – heavier equipment in the
botton; is your ramp long enough to stay below 10 deg?
So when you push the rack up the incline why don’t you turn it
around so that the steerable wheels are in the back to steer the unit to keep
it on the ramp?
:>) br, Pete
Peter E Perkins, PE
Principal Product Safety & Regulatory Affairs Consultant
PO Box 1067
Albany, ORe 97321-0413
503/452-1201
IEEE Life Fellow
IEEE PSES 2020 Distinguished Lecturer
<mailto:p.perk...@ieee.org> p.perk...@ieee.org
Entropy ain’t what it used to be
From: Richard Jones <ve3...@gmail.com>
Sent: Thursday, March 12, 2020 2:41 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Procedure to move heavy 19" rack test equipment into EMI
Chambers
Hi
For those running EMI Labs was wondering what procedures you use to move Test
Racks in and out of EMI Chambers,
We use custom made ramps, which we put over the door threshold, aligning the
front wheels on the ramp, then pushing the unit up and over into the chamber.
Items which seem important:
1. Wheel Size and base dimension
2. Swivel wheels not aligned with ramp ( Most Test racks have swivel
wheels fitted at the front)
3. Communication between team members to move the rack
4. Custom Alloy ramp made from 1/4" checker plate causing a lip where it
touch's the floor
5. Equipment with handles in rack placed near the top, (operator may try
to use to move test rack)
6. Poor center of gravity (equipment position for ergonomics)
Some of our 19" test racks are quite heavy, lightning generators at 400lbs and
other test racks such as amplifiers up to 650lbs
These are commercial units and I believe met safety requirements when purchased.
My questions are:
What procedures/solutions do you have to move equipment and avoid a tipping
situation?
>From a standard point of view Is there any direction on Wheel Size, Wheel
>base, height weight and Ramp Inclination and run off which I could use to
>support possible improvements?
Thanks
Rich
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