VAF instruments 667 - Page 41

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Total volume flow
𝑽 =
∑
∆𝑽 (F4)
V
= Total Volume
[litres]
DV
= Volume from one measurement
[litres]
Volume flow rate
𝑸 =
∆𝑽
∆𝒕
(F5)
Q
= Flow rate
[l/sec]
DV
= Volume from one measurement
[litres]
Dt
= Sample rate
[sec]
𝑸
𝒕𝒄
= 𝑸 ∙
𝜸
𝒕
𝜸
𝟏𝟓.𝟔
(F6)
Q
tc
= Temperature compensated flow rate
[l/sec]
Q
= Flow rate
[l/sec]

15.6
= Specific gravity at reference temperature
[kg/l]

t
= Specific gravity heated to a temperature
[kg/l]
or: 𝑸
𝒕𝒄
= Q
𝟏
𝟏+(∆𝑻 ∙
𝒈𝒄
𝟏𝟎𝟎
)
(F7)
DT
= Temperature difference
[°C]
gc
= Thermal expansion (Gravity change)
[%/°C]
∆𝑽
𝒕𝒄
= ∆𝑽 ∙
𝜸
𝒕
𝜸
𝟏𝟓.𝟔
(F8)
DV
tc
= Temperature compensated volume
[litre]
DV
= Volume from one measurement
[litres]

15.6
= Specific gravity at reference temperature
[kg/l]

t
= Specific gravity heated to a temperature
[kg/l]
or: ∆𝑽
𝒕𝒄
= ∆V
𝟏
𝟏+(∆𝑻 ∙
𝒈𝒄
𝟏𝟎𝟎
)
(F9)
DT
= Temperature difference
[°C]
gc
= Thermal expansion (Gravity change)
[%/°C]