Svantek SVAN 958A - Definitions and Formulas of the Results (VLM Mode); Definitions of the Hand-Arm Vibration Results Available in the Vibration Mode

297
SVAN 958A User Manual
ELV
Exposure Limit Value – constant
value defined by local standards
expressed in
2
s
m
or in
75.1
s
m
D.2.2 Definitions and formulas of the results (VLM mode)
OVL
Percentage of the overloaded input signal, which occurred during the current time period of
the measurement (T)
PEAK
Maximum absolute value of the
signal calculated for the given T
( )
tamaxPEAK
WT
=
P–P
Peak-to-peak (P-P) result is the
difference between highest and
lowest value of the signal
calculated for the given T
( )
( )
( )
( )
ta,0minta,0maxPP
WTWT
− = −
RMS
RMS (root mean square) result for
current time period of the
measurement (T)
( )
2
1
T
0
2
W
dtta
T
1
RMS








=

VDV
Vibration Dose Value result
expressed in m/s
1.75
( )
4
1
T
0
4
W
dttaVDV








=

CRF
CRF value (Crest Factor) is obtained from the proportion PEAK/RMS
MTVV
Maximum Transient Vibration
Value, saved as the main result, is
defined (according to the
ISO 8041 standard)
( )
( )
tpmaxMTVV
WT
=
D.2.3 Definitions of the Hand-Arm vibration results available in the vibration mode
CExp
Current Exposure to vibration
measured from the measurement
start
0
T
T
AEQCExp
=
A(8)
Daily Exposure to vibration
measured based on the TE
exposure time
0
E
T
T
AEQ)8(A
=