QALCOMET HEAT 1, Руководство пользователя

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Heat meter calculator QALCOMET HEAT 1 PEQMH1V01
9
2.
TECHNICAL DATA
2.1. General information
Only technical description of calculator is provided in this document. Technical description of
other sub- assemblies (flow, temperature, pressure sensors
–
according to the modification, selected by
customer, as described in the paragraph 3) is provided in appropriate technical documents.
2.2. Heat energy measurement
2.2.1. Heat energy measurement error of calculator
–
not more than

(0,5+2 /
 Θ) %,
Where
 Θ –
temperature difference between measured flow and return temperatures (
o
C),
depending on energy calculation formula (from Table 1). The smallest temperature difference from
(Θ1
-
Θ2) and (Θ1
-
Θ5) is used to calculate heating energy E1 for mea
surement diagrams A1, A2, A4.
2.2.2. Heat energy calculation
Consumed heat energy is calculated according to formulas provided in Table 1.
It is possible to perform calculations in two ways, using pressure values
*
:
- programmed individually for each particular heating system
*
;
- practically measured ( 1-st pressure channel corresponds to the supply pipe, 2-nd
–
return
pipe).
Possible heat energy measurement algorithms (individually selected for each particular
measurement system)*:

standard unidirectional flow measurement, energy is calculated without any restrictions,

special unidirectional flow measurement, energy is calculated:
a) when flow rate exceeds programmed maximum allowed value -
according to programmed rated maximum value for appropriate flow
channel;
b) when flow rate is under programmed minimum allowed value -
according to programmed rated minimum value for appropriate flow
channel;
c) when temperature difference is under programmed minimum
allowed value
–
according to programmed rated minimum temperature
difference Θ1
-
Θ2 (for the 1
-
st heating system) or Θ3
-
Θ4 (for the 2
-nd
heating system).
Error code is generated when parameter values exceed given limits. Also, in
that case the device stops calculating working time, and calculates error
duration.

winter / summer flow in 2-nd channel is measured in both directions, energy is calculated
taking into account flow direction without any limitations (only for “A1”
measurement scheme
–
see Table 1).
Calculated energy is stored in main register and in corresponding tariff register (1 or 2) when tariff
condition is activated.
Tariff condition is programmed in configuration mode. One of the following conditions can be
programmed independent of 1
st
or 2
nd
tariff:
When the tariff conditions are fulfilled the consumed heat energy is counted in corresponding
tariff register (energy E2 orE3). Energy to the main register E1 and energy to the next register is
not counted.
Energy to the main register E1 is counted, when conditions of one of the activated tariffs are not
fulfilled.
When the tariff with the condition „T1<T2“ is active, energy Et is calculated by formulas in 1
Table, marked with „*“.
Alternate of thermal energy is calculated each 10 s depending on water volume and measured
temperatures by formulas, depending on selected measurement scheme (Table 1).