9.8.3.3 * Dynamic forces due to loading from persons
Where dynamic forces (due to sitting down, standing up, PATIENT handling PROCESS or the like) can be exerted on ME equipment parts intended to support or suspend a PATIENT or OPERATOR in NORMAL USE, the ME EQUIPMENT shall maintain BASIC SAFETY and ESSENTIAL
PERFORMANCE.
Compliance is checked by the following test:
Prior to performing this test, the PATIENT support/suspension system is positioned horizontally in its most disadvantageous position in NORMAL USE.
For the area of support/suspension where a PATIENT or OPERATOR can sit, the top reservoir of the body upper-carriage module described in Figure 33 is loaded with the appropriate mass to obtain the SAFE WORKING LOAD representing the PATIENT or OPERATOR as defined in the ACCOMPANYING DOCUMENTS. The body upper-carriage module with appropriate mass is dropped from a distance of 150 mm from the lowest edge of the foam to the area where a PATIENT or OPERATOR can sit. BASIC SAFETY and ESSENTIAL PERFORMANCE shall be maintained.

NOTE Examples of damage that can affect BASIC SAFETY include the reduction of CREEPAGE DISTANCES and AIR CLEARANCES below those specified in 8.9, access to parts that exceed limits in 8.4, or access to moving parts which could cause HARM.
Assessment criteria that can be useful in determining if this test has resulted in a loss of BASIC SAFETY include:
– those in Clause 8 and 11.6;
– the dielectric strength test as specified in 8.8.3 to evaluate the integrity of solid providing a MEANS OF PROTECTION; and
– measurement of CREEPAGE DISTANCES or AIR CLEARANCES to compare the values with the minimum distances
specified in 8.9. Small chips that do not adversely affect the protection against electric shock or moisture can
normally be ignored.

Parameters: