Eppendorf MixMate - Manual (Page 33)

Exposure Limit Value (ELV)
The table indicates that the operator using 15 ml Falcon tubes in touch vortex mode (3500 rpm) with reported
usage would reach the ELV in 444 minutes and using 50 ml Falcon tubes in 136 minutes. Based on a usage
pattern of 30 seconds vortex / 5 seconds gap, this means that approximately 761 of the 15 ml or 233 of the 50
ml Falcon tubes could produce exposures that reach the ELV. Immediate action must thus be taken to limit
exposures to below the ELV. With a usage pattern of 15 seconds vortex / 5 seconds gap, 1332 x 15 ml tubes
or 408 x 50 ml tubes must be vortexed until the ELV is reached. With a usage pattern of 45 seconds vortex / 5
seconds gap 532 x 15 ml tubes or 163 x 50 ml tubes must be vortexed.
Number of tubes to reach Vortex time
(5 sec gap)
EAV ELV
15 ml
EAV ELV
50 ml
15 sec 333 1332 102 408
30 sec 190 761 58 233
45 sec 133 532 40 163
Number of tubes for not exceeding Vortex
time
(5 sec gap)
EAV ELV
15 ml
EAV ELV
50 ml
15 sec 333 1332 102 408
30 sec 190 761 58 233
45 sec 133 532 40 163