Kamstrup MULTICAL 403 Technical Description

MULTICAL® 403
Kamstrup A/S · Technical description · FILE100000166_B_EN-55121689_M1_07.2023
81
7.1.2 Energy registers E8 and E9
E8 and E9 are used as a basis for calculating the volume-based average temperatures of inlet and outlet respectively.
With every volume count (every 0,01 m
3
for qp 1,5 m
3
/h with CCC=419) the registers are accumulated by the
product of m
3
x °C, which makes E8 and E9 a suitable basis for calculation of volume-based average temperatures.
E8 and E9 can be used for average calculation during any period of time as long as the volume register is read at the
same time as E8 and E9.
Resolution of E8 and E9
E8 and E9 depend on the resolution of the volume V1 (m
3
)
which is fixed by the CCC code. This dependency means that
a factor is used in connection with the calculation of E8 and
E9. This also means that the same factor must be used in
connection with the calculation of the average temperature.
Volume resolution
Resolution of E8 and E9
0000,001 m
3
m
3
x °C x 10
00000,01 m
3
m
3
x °C
000000,1 m
3
m
3
x °C x 0,1
0000001 m
3
m
3
x °C x 0,01
E8 and E9 can be used for calculating the average temperature in inlet and outlet in any periods of time if only:
1) The volume register is read at the same time as E8 and E9,
2) the relevant resolution factor is included in the calculation,
3) the requirement for a minimum flow (volume) is complied with.
E8 = m
3
x t1, E8 is increased by the product of m
3
x t1
E9 = m
3
x t2, E9 is increased by the product of m
3
x t2
Example 1: E8 and E9 for a heating installation that within a year has used 250,00 m
3
district heating water with
average temperatures of 95 °C in inlet and 45 °C in outlet. The meter has a volume resolution of 00000,01 m³,
and thus the formula m³ x °C is used with the following result: E8 = 23750 and E9 = 11250.
Example 2: The average temperatures are to be measured together with the yearly reading. Therefore, E8 and E9 are
included in the yearly reading. The meter used in this calculation example is a qp 3,5 m³/h with CCC code 451
(volume resolution with 1 decimal/000000,1 m³).
Date of
reading
Volume
E8
Temp. average
for inlet
E9
Temp. average
for outlet
2018.01.01
5342,6 m
3
45346
18554
2017.01.01
2368,7 m
3
20123
7651
Yearly
consumption
2973,9 m³
(5342,6 – 2368,7 m³)
25223
(45346 - 20123)
25223 / 2973,9 / 0.1
= 84,81 °C
10903
(18554 – 7651)
10903 / 2973,9 / 0.1
= 36,66 °C
Table 4

Kamstrup MULTICAL 403 Specifications

General

Type	Ultrasonic Heat Meter
Flow Sensor	Ultrasonic
Pressure Rating	PN16
Battery Life	Up to 16 years
Approval	MID Class 2
Display	LCD
Communication	M-Bus, Wireless M-Bus, Modbus, BACnet
Power Supply	Battery
Accuracy	Class 2
Protection Class	IP54
Housing Material	Composite
Flow Rate Range	0.6 m3/h to 15 m3/h