1.
Check the following values for this inspection interval:
• J = Number of working days during the inspection interval [days]
• H = Average lifting height [m]
• N = Average number of work cycles per hour [cycles/h]
• T = Average daily operating time [h]
• V = Maximum hoisting speed [m/min] (as shown on the data plate)
2.
Use the following formula to calculate T
i
, the motor operating hours (total lifting time) for
each inspection interval:
For example, if you use:
J = 180 [days], H = 5 [m], N = 20 [cycles/h], T = 12 [h], V = 5 [m/min]
Step 2: Calculate the actual load spectrum factor for each inspection interval, K
mi
1.
Divide the total lifting time in proportion to the actual load spectrum during the inspection
interval.
For example, if the product has lifted full loads (100%) for half of the time and no load (0%)
for half of the time, then record 50 for each of these two in the column Lifting time % of the
following table.
Load %
Lifting time %
Factor k
3
Load spectrum factor
100%
*
1
=
80%
*
0.51
=
60%
*
0.22
=
40%
*
0.06
=
20%
*
0.01
=
0%
*
0
=
Total:
100%
Sum:
Divide by 100: Sum/100 =
Load spectrum factor, K
mi
:
2.
Check that the sum of the figures in the column Lifting time % is 100%.
3.
Multiply each entry in the column Lifting time % by the multiplier in the “Factor k
3
” column.
Write the results in the column Load spectrum factor column.
4.
Add up the numbers in the column Load spectrum factor column and record the result of
this sum.
5.
Divide the sum of the column Load spectrum factor column by 100 to get the K
mi
.
For example, if you use:
100% load for 10% of the time, 40% load for 30% of the time, and 20% load for 60% of the time:
7 MAINTENANCE
This document and the information contained herein, is the exclusive property of Verlinde S.A.S and represents a non-
public, confidential and proprietary trade secret that may not be reproduced, disclosed to third parties, altered or
otherwise employed in any manner whatsoever without the express written consent of Verlinde S.A.S. Copyright 2020
© Verlinde S.A.S. All rights reserved.
6/2020