SPT 943.1 heatcalculator

The SPT943 heatcalculator - the two - channel device intended for automation of the accounting of heatconsumption. It is calculated on work as a part of heat meters for the opened and closed systems of water heat supply.
Compliance to standards

The heatcalculator meets requirements of GOST P 51649 - 2000, GOST P 51522 - 99, GOST P 51350 - 99. At the heart of algorithms of calculation of thermal energy and mass of the heat carrier recommendations of MI 2412 - 97 and "Rules of the accounting of thermal energy and the heat carrier" lie.
Functionality
Service of two independent thermal loadings, for each of which can be chosen any of twelve schemes of the account with three converters of an expense, two converters of pressure and two or three converters of temperature.
The connected sensors:
- six thermoconverters of resistance 100 P;
- four converters of pressure with an output signal 4 - 20 ma;
- six preobrazovatelny expenses with a chisloimpulsny output signal with a frequency up to 1000 Hz.
Possibility of food of the flowmeters similar to SONO - 2500CT, directly from the heatcalculator.
Archiving of average and total values of the measured and calculated parameters with a binding to payday and hour.
Maintaining archives of changes of parameters of the adjusting database and emergency situations.
Possibility of measurement of temperature of cold water and temperature of external air.
Expanded system of diagnostics - the choice of algorithms of processing of emergency situations.
Formation of an on - off output signal by results of diagnostics.
Consecutive (RS232C - compatible) and optical (IEC1107) ports for an exchange with external devices.
Work with telephone and GSM modems.
Data read - out by means of the store ADS90 and the portable computer.
Conclusion of reports to the printer (by means of the APS45 adapter).
Speed of an exchange is 19200 bps.
Registration of external events (for example losses of supply voltage of flowmeters) by means of specially provided discrete entrance.
Capacious board - two lines on 20 symbols, the simple and convenient interface of the user, evident procedures of viewing of archives.
Metrological characteristics

Error limits at measurement:
- expense (relative) ± 0, 05% ;
- temperatures (absolute) ± 0, 15 °C;
- differences of temperatures (absolute) ± 0, 03 °C;
- pressure (brought) ± 0, 1% ;
- time (relative) ±0, 01% .

Error limits at calculation:
- quantities of thermal energy and weight (relative) ± 0, 02% ;
- volume (relative) ± 0, 01% .
Operational indicators

Air temperature - from minus 10 to 50 °C.
Relative humidity - 95% at 35 °C.
Degree of protection against dust and water - IP54.
Overall dimensions of 208x206x87 mm.
Food - from the lithium battery (a possibility of replacement without dismantle) or from an external source of 12 Century.