Burkert Flowave 8098, Operating Instructions Manual

Page: 241 / 354

241
SAW sensor – Parameter
Type 8098 FLOWave L
15.15 Getting as accurate measurements of the volume
flow rate, the mass flow rate or the liquid velocity as
possible
To get as accurate measurements of the volume flow rate, the mass flow rate or the liquid velocity as pos -
sible, you can activate the compensation of the kinematic viscosity (in mm
2
/s).
The following kinematic viscosity compensations are available:
• for water or a liquid whose viscosity
u (in mm
2
/s) varies with the temperature T (in °C) like the viscosity of
water and in the same range as water. Default setting. The related equation is:
𝑣𝑣 =
1
0, 0,020217𝑇𝑇 + 9,9. 10 −5 𝑇𝑇 2
→
To activate the viscosity compensation for water, see chapter 15.15.1 .
• for a liquid with a constant viscosity. To be chosen if the liquid temperature is constant and thus the vis-
cosity of the liquid is constant. The related equation is:
𝑣𝑣 = 𝑎𝑎
→
To activate the viscosity compensation for a liquid whose viscosity is constant, see chapter 15.15.2 .
• for a liquid with a linear compensation curve. To be chosen if the viscosity of the liquid varies in a linear
way depending on the liquid temperature. The related equation is:
𝑣𝑣 = 𝑎𝑎 + 𝑏𝑏𝑏𝑏
→
To activate the viscosity compensation for a liquid with a linear viscosity compensation curve, see
chapter 15.15.3 .
• for a liquid with a quadratic compensation curve. To be chosen if the viscosity of the liquid varies in a
quadratic way depending on the liquid temperature. The related equation is:
𝑣𝑣 = 𝑎𝑎 + 𝑏𝑏𝑏𝑏 + 𝑐𝑐𝑏𝑏
2
→
To activate the viscosity compensation for a liquid with a quadratic viscosity compensation curve, see
chapter 15.15.4.
• for a liquid with an inverse quadratic compensation curve. To be chosen if the viscosity of the liquid varies
in an inverse quadratic way depending on the liquid temperature, but the viscosity range is different from
the one of water. The related equation is:
𝑣𝑣 =
1
𝑎𝑎 + 𝑏𝑏𝑏𝑏 + 𝑐𝑐𝑏𝑏
2
→
To activate the viscosity compensation for a liquid with an inverse quadratic viscosity compensation curve,
see chapter 15.15.5 .
English