V Maxx - Compact heat meter

1.1 heat Meters compact Integral MaXX, produced by the plant Allmess GmbH, Germany, company Itron France, France (hereinafter referred to as heat meters), designed for measurement of the consumed thermal energy and volume of fluid, and display measured values of the temperature of the coolant in forward and reverse flow, the difference between these two temperatures, heat capacity, volumetric flow, and time fault condition the flowmeter.

1.2 Heat meters can be used in accounting, including commercial, consumption of thermal energy in the closed heat supply systems in accordance with applicable accounting rules leave and use of thermal energy in apartments and homes, industrial facilities and utilities.

1.3 Heat meter consists of a single wing counter hot water, double platinum RTDs and electronic PtlOO the heat (hereinafter referred to as the computer).

1.4 in order To heat when using expansion card (option) can be connected up to four additional water meters with pulse outputs, with output display their heat meter readings.

1.5 Heat meters are available in nominal sizes (DN) 15 and 20 mm

1.6 Heat stores information about the consumed thermal energy and volume of the heat carrier for thirteen months in the past.

1.7 Heat produces automatic control of the accuracy of the temperature difference; the accumulated information is stored (EEPROM).

1.8 the readings of the heat meter can be done visually from the display of the transmitter, and remotely - via the bus M-BUS (by setting the corresponding the expansion unit).

1.9 the Use of M-BUS and hub allows you to provide a reading from 250 meters according to the following parameters: the amount of heat energy; the amount of of the carrier; the amount of water measured by two additional counters; the temperature of the coolant; the fault signals; serial number evaluator; the date and time readings.

1.10 the Metrological characteristics of the flowmeter the flowmeter meet the requirements of accuracy class With the recommendations of the PTB.

1.11 Display of the heat meter is rotated 360 °C.

1.12 When ordering heat meters must be specified:

• name - Integral MaXX;
• nominal diameter (DN) of 15 or 20 mm;
• nominal coolant flow rate, m /h
• a unit of heat energy (in MWh or GJ);
• installation location - supply or the return pipe;
• additional features (one of the following):

• connection of additional water meter (with price momentum 100 or 10 l/imp.) with access to M-Bus;
• pulse output according to the amount of thermal energy and volume of fluid (dry contact).

2 SPECIFICATIONS

2.1 operating conditions of the heat meter:

• ambient temperature from 5 to 55 °C,
• relative humidity from 30% to 93%,
• atmospheric pressure - from 86 to 106.7 kPa,
• storage temperature from -10 to 60 °C.

2.2 the Applied resistance - RTD Pt 100 according to IEC 751 Class Century

2.3 Main specifications of heat are given in table 1.

Table 1 - Main technical characteristics of the heat

Nominal diameter DN mm 15 20 Installation of heat meters Horizontal and vertical position Nominal flow rate Qnom, m /h 1,5 2,5 The maximum flow rate Qmax, m /h 2,5 3,75 Transitional flow rate Qt, dm3/h 90 150 Minimum Qmin, dm3/h 15 25 Maximum working pressure, bar 16 Coolant temperature, °C 20-90 The outside measurements of the temperature difference AT, °C 3-70 The outside measurements of the temperature T, °C 20-90(20-140) The limits of relative error in the measurement of thermal
energy flow range 0.04 Qmax Q Qmax, %:
- when the temperature difference DT 20 °C
- when the temperature difference 3 DT 20 °C

±4
±5

±4
+ 5 The limits of relative error in volume measurement
in the range of expenditures, %:
- 0.04 Qmax Q Qmax
- Q Qmax 0.04

±2
±5

±3
±5 Capacity reading proasta, discharges 9999999 (kW/h) 99999,99 (mA/h) The low-discharge transmitter:
temperature T, °C
- on temperature difference AT, °C
- volume, m
- heat energy, kWh/GJ
0,1
0,01
0,01
0,001/0,01 Food Lithium battery 3.6 V
service life - 10 years Security 1P 54 *Note: the pressure Loss of heat is shown in graph 1 (see below)

Graph 1: pressure Loss of the heat

2.4 Output characteristics of heat from the expansion cards:

a) with pulse output:

• the pulse duration 500 MS;
• switching current is not more than 20 mA;
• the maximum voltage not exceeding 30 V;
• the distance to the adder no more than 30 m;
• the contact is not polarized;
• the weight of the pulses:

• for heat energy to