SICK FLOWSIC600 Technical Information

Product Description
FLOWSIC600 · Technical Information · 8010125 V 4.0 · © SICK AG 27
Subject to change without notice
Calculation of total volume
The total volume counters +Vo and -Vo represent the sum of the respective volume
counter plus the error volume counter:
|+Vo| = |+Vf| + |+Ef|
|-Vo| = |-Vf| + |-Ef|
The total volume counter Vo counts forward for volume flow in the positive direction and
backwards for volume flow in the reverse direction:
Vo = |+Vf| + |+Ef| - |-Vf| - |-Ef|
Low flow cut off
If the current flow rate falls below a preset limit (register #7036 "LowFlowCutOff"), the
calculated volumetric flow is set to zero. The current calculated flow velocity is not affected
by this. The limit is set to 0.25 Q
min
at the factory.
2.3.4 Determining the speed of sound
The actual speed of sound c in the gas under operating conditions is calculated from the
sum of the two measured propagation times t
AB i
and t
BA i
of a path.
A theoretical speed of sound can be derived from the gas composition, pressure and tem-
perature values. This theoretical speed of sound and the measured speed of sound should
be identical. The speed of sound thus provides an excellent diagnostic measure for system
operation
 pg. 169, 6.2.1.
Reg. Volume counter Abbreviation
#5016 (low bit)
#5017 (high bit)
Total volume at flowing conditions (forward)
1
1
The 18 digit total volume counter values are stored in two long word registers of 9 digits each. The first 9 digits are
stored in the "low"digit register, and the last 9 digits in the "high" digit register. The LCD displays only the"low" bits
of the total volume counters.
+ Vo
#5018 (low bit)
#5019 (high bit)
Total volume at flowing conditions (reverse)
1
- Vo
#5085 (low bit)
#5086 (high bit)
Total volume at base conditions (forward)
1
+ VB
#5047 (low bit)
#5048 (high bit)
Total volume at base conditions (reverse)
1
- VB
#5045 (low bit)
#5046 (high bit)
Total volume at flowing conditions (plus forward,
minus reverse)
1
Vo

L
i
1 1
2 t
AB i
t
BA i
1
4
i = 1
4
c = c
i
c
i
= • ( +  )

SICK FLOWSIC600 Specifications

General

Brand	SICK
Model	FLOWSIC600
Category	Measuring Instruments
Language	English