BS EN ISO 20320-2020 Protective clothing for use in Snowboarding一Wrist Protectors一Requirements and test methods.
For each range to be tested, two pairs of wrist protectors shall be provided (Sample No. I and No. 2). For standalone wrist protectors, manufacturers shall provide all type of gloves specified in the information supplied by the manufacturer and for all ranges to be tested
If the wrist protector according to the information supplied by the manufacturer (see CJausel) protects the palm against impact (41). a third pair of wrist protectors (No. 3) shall be provided.
The test samples shall be supplied with the information supplied by the manufacturer according to Clause 7.
All samples shall be conditioned before testing impact strength (5k), impact performance (1) and limitation of extension (5), where samples shall be mounted to the prosthesis before conditioning. For standalone wrist protectors, gloves shall be conditioned too.
5.3.2 Room temperature conditioning
The mounted samples shall be exposed to a temperature of (20 ± 2) °C for not less than 4 h. Testing shall
be completed in the conditioning environment or within 2 mm of removal from the environment.
5.3.3 Cold temperature conditioning
The samples shall be exposed to a temperature of (—10 ± 2) °C for not less than 4 h. Testing shall be completed in the conditioning environment or within 2 mm of removal from the environment.
An assessor of suitable hand size shall put on, tighten and take off both wrist protectors (left and right) by themselves (without external support) as specified in the information supplied by the manufacturer, including gloves for wrist protectors, provided to be worn with gloves.
An assessor shall fix and then unfix themselves to a snowboard by closing and then opening the binding of the snowboard (left and right) while wearing wrist protectors and gloves on both hands (right and left).
The wrist protector shall be put on by an assessor with the appropriate hand sizing (see Table 1) in the way specified in the information supplied by the manufacturer.
Standalone protection concept to be worn over the glove shall be tested with the type of gloves specified in the information supplied by the manufacturer.
Fasten the wrist protector as specified in the information supplied by the manufacturer. A reference line square to the long axis of the fingers, which best represents the mean approach to the positions of the marks showing the joint position [Line 2 of Figure 2 a)] shall be drawn onto the upper surface of the wrist protector. A mark shall be drawn onto the skin of the forearm within 1 cm from the end of the wrist protector [Line 1 of Figure 2 a)j.
The assessor shall flex the wrist in palmar and dorsal directions 10 times to the full range of motion.
The assessor shall sit or stand with the trunk in a vertical position, the rear side of the upper arm pressed against a vertical support or wall and the forearm with the protector or protector and glove to be tested oriented approximately horizontal. The hand and linger joints shall be maintained in a stretched position during the test.
The distance between the reference line and the mark on the forearm shall be measured [Distance I of Figure 2 a)J.
The force shall be applied at a rate of <200 mm/s in a direction parallel to the (longitudinal) axis of the forearm, by using a spring balance or similar device with a measuring range of at least 30 N. Forces shall be attached to the inner and to the outer side of the protector [mediolateral direction, see Figure 2 b)j. Apply the force of (15 ± 1,5) N and maintain for (10 ± 1) s in a direction parallel to the forearm axis. Then release the forces. Measure the distance between the reference line (line 1) and line 2 with an accuracy of± 2 mm within 5 seconds after release of the applied force [Distance 12 see Figure 2 c)J.
Three tests shall be made using the same sample. Reposition and adjust the wrist protector as necessary between the tests.BS EN ISO 20320 pdf download.