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MULTICAL®
602
Kamstrup
A/S
∙
Technical
Description
∙
5512
‐
931_N1_GB_11.2016
39
6.5
Flow measurement, V1 and V2
MULTICAL
602 calculates current water flow according to two different principles depending on the connected flow
sensor type:
6.5.1
Fast volume pulses (100 < CCC < 900)
The current water flow for fast volume pulses is calculated, without average determination, as the number of volume
pulses per 10 s multiplied by a scaling factor.
q = (pulses/10 s x flow factor)/65535
l/h
or
m
3
/h
Example:
-
ULTRAFLOW
®
qp 1.5 m
3
/h with 100 pulses/l (CCC=119), flow factor = 235926
-
Current water flow = 317 l/h corresponding to 88 pulses/10 s
q = (88 x 235926)/65535 = 316.8 which is shown in the display as 316
l/h
Current water flow in V1
6.5.2
Resolution of the actual flow rate (100 < CCC < 900)
The display resolution of the actual flow rate can be derived from the flow factor and the number of decimals.
Example 1:
-
ULTRAFLOW
®
qp 1.5 m
3
/h with 100 pulses/l (CCC=119), flow factor = 235926
Resolution = 235926/65535 = 3.6 which is shown in the display as 3
l/h
Example 2:
-
FUS380 Qs 75 m
3
/h with 1 pulses/l (CCC=201), flow factor = 235926
Resolution = 235926/65535 = 3.6 which is shown in the display as 3.6
m
3
/h
6.5.3
Slow volume pulses (CCC = 0XX, 9XX)
The current water flow for slow volume pulses (typically from flow sensors with a Reed switch) is calculated without
average determination as a scaling factor divided by the period of time between two volume pulses.
q = flow factor/(256 x period in s)
l/h
or
m
3
/h
Example:
-
Mechanical flow sensor Qn 15 qp m
3
/h with 25 l/pulse (CCC=021), flow factor = 230400
-
Current water flow = 2.5 m
3
/h corresponding to 36 s in the period of time between 2 pulses
q = 230400/(256 x 36) = 25, which is shown in the display as 2.5
m
3
/h
V1 and V2 must be the same type (either quick (CCC
100) or slow (CCC=0XX)) but can have different qp-codings
(CCC).
Using top modules 67-02 or 67-09, V1 and V2 must have identical qp-codings (CCC).
The actual flow rate on the display will be shown a ”0”, when the period between pulses exceed 15 min.