MULTICAL® 803
126
Kamstrup A/S · Technical description · 5512-2360_A1_
GB
_02.2019
7.13
Preset and Scheduler functions for temperature inputs
With MULTICAL® 803, it is possible to program (preset) values for the calculator’s temperature inputs. The primary
demand for programmed values will be in the measurement of hot water energy where the low temperature is
programmed because it cannot be measured in practice. Read more about application examples in paragraph 7.1. In
addition to program a fixed value (preset), it is also possible to program a variable value that varies over the year
(Scheduler). The table below shows which temperature inputs can be programmed in which meter types.
Note: The temperature inputs t1 and t2 are the legal inputs, which means that they cannot be programmed on an
approved heat meter, cooling meter or bifunctional heat/cooling meter.
By active offset adjustment of the temperature sensor input, the offset adjustment does not influence the preset
value of temperature. Read more about offset adjustment in paragraph 7.3.
Temperature inputs
Meter type
Approvals
t1
t2
t3
t4
1 Heat meter
MID module B
-
-
2 Heat meter
MID module B+D
-
-
3 Heat/cooling meter MID module B+D & TS 27.02
ϴ
HC
= OFF
-
-
4 Heat meter
National approval
-
5 Cooling meter
TS 27.02+BEK1178
-
-
6 Heat/cooling meter MID module B+D & TS 27.02
ϴ
HC
= ON
-
-
7 Volume meter
-
-
9 Energy meter
-
-
7.14
Differential energy and volume calculation
MULTICAL® 803 has integrated differential calculation of energy and volume The results of these calculations are
stored in the following four registers:
-
dE: difference Energy (E4 - E5 > 0)
-
cE: control Energy
(E4 - E5 < 0)
-
dV: difference Volume (V1 - V2 > 0)
-
cV: control Volume
(V1 - V2 < 0)
All four registers are cumulative registers in which dE and dV count up by a positive difference and cE and cV count
up by a negative difference. A reading of both differential and control registers reveal how much is counted with a
positive and a negative difference over a given period and it is thus possible to see if the system has been in balance
over the selected period.
The calculations follow the integration speed in MULTICAL® 803 and the calculations are thus made with an
integration interval of 2 s. All four registers can be displayed in the calculator's USER loop and saved in the
calculator’s loggers. See paragraph 3.4.4 on display setup (DDD codes) and paragraph 3.4.12 on possible logger
profiles (RR codes).
Below is a calculation example of the dE and cE registers as well as examples of the display readings.