Eppendorf MixMate - Manuel (Page 34)

Declaration of Conformity
The device was tested in accordance with EN ISO 5349-1 : 2001 “Mechanical vibration – measurement
and assessment of human exposure to hand-transmitted vibration – Part 1”
Product name:
MixMate 5353
Product type:
Mixer for microtest tubes and plates with integrated touch vortex function
Hand-arm-vibration assessment of MixMate 5353 in accordance with DIN ISO 5349-1:2001
Tests were performed on the MixMate operated in the “touch vortex” operation mode (3500 rpm) with 15
ml and 50 ml Falcon tubes. The total vibration value was measured, the daily vibration exposure and the
exposure points calculated from it.
The exposure action value EAV of 2.5 m/s
2
A(8) is equivalent to 100 exposure points and is the level at
and above which hand-arm-vibration management procedures must be initiated where employees are
regularly exposed to this level of vibration exposure.
The exposure limit value ELV of 5 m/s
2
A(8) is equivalent to 400 exposure points and must not be
exceeded on any work day. If it is, immediate measures must be taken to control vibration levels or reduce
exposure times to limit daily vibration exposure to below the ELV.
Tube Total
vibration
value
Daily
exposure
value
1 HOUR
exposure points
Time – single tool
use:
For not exceeding
EAV ELV
m/s
2
m/s
2
2.5 m/s
2
minutes
5 m/s
2
minutes
Usage pattern: Each
test consisted of a
reprensentative usage
pattern equivalent to 5
successive touch vortex
operations of 30 seconds
with 5 second intervals in
a total of 2 minutes 30
seconds “on” and 20
seconds “off”. Tubes
were filled with 2/3 of
water.
15 ml
50 ml 5.2
9.4 1.8
3.3 54
177
111
34
444
136
Exposure Action Value (EAV)
The table indicates that the operator using 15 ml Falcon tubes in touch vortex mode (3500 rpm) with
reported usage would reach the EAV in 111 minutes and using 50 ml Falcon tubes in
34 minutes. Based on a usage pattern of 30 seconds vortex / 5 seconds gap for changing
the tube, this means that approximately 190 of the 15 ml or 58 of the 50 ml Falcon tubes could produce
exposures that reach the EAV. With a usage pattern of 15 seconds vortex / 5 seconds gap, 333 x 15 ml
tubes or 102 x 50 ml tubes may be vortexed without exceeding the EAV.
With a usage pattern of 45 seconds vortex / 5 seconds gap 133 x 15 ml tubes or 40 x 50 ml tubes may be
vortexed.