Keysight Instrument Rack E7950A-1.3m E3661B-1.6m E3662B-2.0
25
Figure 11
Moment Illustration for Slide Mounted Products
Weight and balance worksheet:
1
Total the weight of operator serviceable slide-mounted products: A= lbs; B=
lbs; C=lbs; D=lbs; . . .
2
Total the weight of all fixed and trained service personnel serviceable
products:
a=lbs; b=lbs; c=lbs; d=lbs; . . .
3
Calculate the moment for both the operator serviceable slide-mounted
products (M1) and the fixed and trained service personnel serviceable
products (M2) totals from above:
M1 = (A + B + C + D + . . . ) * 1.25 ft =ft/lbs
M2 = 16.1 ft/lbs + (a + b + c + d + . . . ) * 1.00 ft =ft/lbs If M1 is less than or equal
to M2, no additional counter weight is needed.
If M1 is greater than M2, use the formulas below to determine the required
counter weight.
4
Determine required counter weight if M1 is greater than M2:
Force (in lbs) = M1 - M2 ft/lbs ( 2.05 ft = amount of force @ 2.05 ft ) Each ballast
kit weighs 30 lbs
Work Surface/Keyboard
To reduce the risk of rack instability when using a work surface as illustrated in
Figure 12, use the following worksheet to determine the need for additional
counterweight ballast. If there are no work surfaces or keyboard mounting kits in
the rack, this worksheet can be ignored.