GFS2102™ OPERATION AND MAINTENANCE MANUAL
© 2007 DH Instruments, a Fluke Company
Page 156
VARIABLE
DEFINITION
m
Instantaneous mass depleted from the balance (g).
m
t
Required mass to deplete to obtain a %Reading uncertainty
E
Φ
Error factor used to simplify the required mass equation.
E
Requested %Reading error value. This is either the error at which to start sampling
or the error at which to end sampling.
T
Time elapsed since the beginning of accumulation (s).
Δ
m
Mass uncertainty at any given mass value. For simplicity other sources of
uncertainty that are related to mass must be combined to determine this value.
Δ
t
Time uncertainty at any given mass value. For simplicity other sources of
uncertainty that are related to mass must be combined to determine this value.
q
Nominal flow target (g/s). This is not the instantaneous flow value.
ε
m
Fixed mass uncertainty. All fixed components of mass based uncertainty should be
combined to determine this fixed value. (Drift, buoyancy correction ect)
ν
m
Span based mass uncertainty. All span based components of mass uncertainty
should be combined to determine this span based value.
ε
t
Fixed time uncertainty. All fixed components of time based uncertainty should be
combined to determine this fixed value. (data acquisition latency, clock drift, ect).
ν
t
Span based time uncertainty. All span based components of mass uncertainty
should be combined to determine this span based value.