IRGA-RVS heat meter

Irga-RVS heat meter is designed for measuring the amount of heat energy and heat carrier from a supplier or consumer, as well as for monitoring the parameters of a heat carrier in closed and open heat supply systems, where water and steam serve as a heat carrier.

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Description

The Irga-RVS heat meter is designed specifically for consumers who are so accustomed to the electronic correctors manufactured by NPF Logika CJSC, that heat meters with computers from other manufacturers are not friendly to them.

The heat meter complies with the requirements of the rules for accounting for thermal energy and heat carrier. Irga-RVS can be used in commercial and technological accounting of steam (heating water) and thermal energy.

The steam meter (1 channel) includes:

SPT-963 computer - 1 pc.
Irga-RV vortex flow meter - 1 pc.
gauge or absolute pressure sensor - 1 pc.
thermal converter - 2 pcs.
condensate flow sensor - 1 pc.
flow meter power supply - 1 pc.

The Irga-RVS heat meter is designed to service two heat exchange circuits containing up to four pipelines with a coolant (water, condensate, superheated steam, dry or wet steam) and provides:

measurement of thermal energy, thermal power, volume, mass, temperature difference and average values of flow, temperature and pressure of the coolant;
archiving of hourly, daily and monthly values of the amount of thermal energy, volume, mass, average values of flow, temperature and pressure;
measuring and archiving average values of temperature and pressure of cold water at the input of a heat source and outdoor temperature;
archiving changes to settings, abnormal situations and power outages;
input of setting parameters;
Indications of current, archive and setting parameters on the built-in screen;
maintaining a calendar and time of day and accounting for working hours;
data protection from unauthorized changes.

The volume of archived data is:

1,080 hourly, 366 daily, 24 monthly values of the amount of thermal energy, volume, mass, average consumption, average temperature and average coolant pressure;
400 archiving changes to settings, abnormal situations and power outages.

Heat meters can additionally service the accounting of water consumption or water disposal through four pipelines.
Heat meters provide communication with external devices through IEC 1137, RS232S and RS485S ports of the heat meter.

Technical characteristics

The ranges of indications are:
• 0-1.6MPa (0-30MPa) - pressure in water (steam) systems;
• 0-150 °С (100-600 °С) - temperature in water (steam) systems;
• 3-145 °С - temperature difference in water systems;
• 0-1000kPa - differential pressure;
• 0-100000 - volumetric [m3/h] and mass [t/h] consumption;
• 0-999999999 - mass [t] and volume [m3];
• 0-999999999 - thermal energy [Gcal, GJ, MW], thermal power [Gcal/h, GJ/h, MW/h];
• 0-999999999 - time [h].
2. Limits of permissible error in operating conditions when measuring:
• thermal energy and thermal power of water (relative),% ± (2 + 4Δtн/Δt + 0,01 Gв/G)
• enthalpies of steam (relative),% ± 4
• temperature of water and steam (absolute), ° С ± (0.25 + 0.002t)
• differences in water temperatures (relative),% ± (0.1 + 10/Δt)
• volume, mass, volumetric and mass flow rate of water (relative),% ± 2
• mass and mass flow rate of steam (relative),% ± 3
• pressure of water and steam (reduced; normalizing value is the upper limit of the range of readings),% ± 1
• difference of water and steam pressures (reduced; normalizing value is the upper limit of the range) on indications),% ± 0.5
• time (relative),% ± 0.01
3. Terms of use:
• ambient temperature, °С from +5 to +50
• relative humidity,%, °С 80 at 35
• atmospheric pressure, kPa from 84 to 106.7
• vibration, Hz amplitude 0.35 mm,
frequency from 5 to 35
• magnetic field - intensity 40 A/m, frequency 50 Hz.
4. Dust and water protection degree - IP54.
5. Power supply - 220 V, 50 Hz or from built-in batteries.
6. Mean time between failures, 70,00
7 h. Average service life, years 12

Advantages

Nominal diameter DN, mm*	Operating consumption, m³/h
Nominal diameter DN, mm*	minimum	maximum*
20, 25**	0,100	10
20, 25**	0,160	12
32	0,250	20
40	0,300	24
50	0,625	50
80	1,250	100
100	1,875	150
150	6,250	500
200	12,500	1 000
250	15,625	1 250
300	20,000	1 400

Note

* The upper limit of measurement under operating conditions, if necessary, can be changed in agreement with the manufacturer.
** There are two versions for DN20 and DN25.

Table 3. Measured flow ranges for liquids with a viscosity of 1 cSt (water viscosity) submersible version)

Nominal diameter DN, mm	Operating consumption, m³/h
Nominal diameter DN, mm	minimum	maximum
400	40	3 000
500	65	4 800
600	90	7 000
700	120	9 000
800	160	12 500
900	200	15 000
1 000	250	18 000
1 200	360	28 000
1 400	480	35 000
1 500	550	42 000
1 600	650	50 000
1 800	800	60 000
2 000 *	1 000	75 000
3 000 *	1 500	100 000

Note

* For flow meters with a DN greater than 2,000 mm, the upper limit of the flow measurement is customized, agreed with the manufacturer of the flow meters and entered in the log of the flow meter.

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