Super User 212 Heat Calculator by Contrec The 212 Heat Calculator by Contrec has been designed to measure the energy consumed in hot water heating systems and chilled water cooling systems. The 212 is supplied complete with temperature probes and is able to interface with a wide range of flowmeters, including positive displacement and inferential water meters, magnetic flowmeters with pulse outputs, turbine and paddle wheel flowmeters. PROVIDING FLEXIBILITY TO MEET ALL APPLICATION Offering multilingual capability, datalogging and peak/off-peak operation are standard. The 212 in addition has four modes of operation covering heating and cooling ensure that it is flexible enough to meet all energy measurement applications. The high accuracy of the 212 ensures that it meets European and International approvals for heat calculators. ACCURACY TO OIML R75 CLASS 4 AND EN1434 The 212 can be supplied with two precision 4-wire Pt100 RTDs and has inbuilt correction for the non-linearity of the RTDs. For chilled water measurement where the temperature difference (Δt) is likely to be small, provision is made in the set-up program to zero out any offset between RTDs. The 212 is fully programmable and all set-up data and totals are stored in a non-volatile memory for a minimum of 10 years. Features Complies with OIML R75 and EN1434 Standards Multilingual Capability Heating, Cooling and Air Conditioning Built-in Density and Enthalpy Tables Meter-Bus Interface or RS485 Communications Metric or US Units 4-Wire PT100 RTD Temperature Inputs Fully Programmable Calculates and Displays Volume, Energy, Temperatures and Peak Energy Watertight to IP66 (Nema 4X) High Accuracy CE Compliant 4-20mA Output Option Display Type: 7 digit LCD - 7 numberic digits and 11 alpha characters Digits: 15.5mm high Characters: 6mm hihg Display Units: kWh, MWh, MJ, GJ, therm, BTU x 1000, tons x hours (refrigeration) Maximum Thermal Power: 3000MW Measurement Time: 0.5s Accuracy: OIML R75 Class 4 and EN1434 Approvals: Approved by Swiss Federal Office of Metrology to OIML Class 4 Interface: CE Compliance {2jtoolbox_content tabs id:2 title: Power} DC Power: 12 to 24Vdc @ 100mA maximum AC Power: Supplied via power adaptor Battery Version Battery Type: 2 x Lithium battery packs Battery Life: 5 years {2jtoolbox_content tabs id:2 title: Physical} Temperature Operating: 5 to 55°c Storage: -20 to +70°c Environmental Class: EN1434 Classes A & C Enclosure Protection: IP66 (Nema 4X) watertight Materials: Polycarbonate and ABS Mounting Options Wall: Wall mount bracket Panel: Mounting clips Inputs Flowmeter Type: Frequency or pulse between 0.01Hz to 20KHz. Default low frequency cutoff is 0.25Hz K-factor Range: Programmable in the range 0.0001 to 999,999.9 pulses per litre, m3, US gallon or ft3 Signal Type: Pulse, open collector, reed switch, proximity switch or coil Location: In either the return or feel lines Temperature Type: 4-wire PT100 RTS's to IEC 751. 1/10 DIN Location: 1 x Feed Line and 1 x Return Line Linearisation: Built-in RTD linerarisation Temp Range: -10 to +220°c (1 to 200°c approved) Temp Difference: 1 to 200K (1 to 199K approved) Measurement Time: 3s Cable Length: <50m Connection: G1/2B Outputs Display Pulse Type: Open collector will sink up to 100mA, 30Vdc maximum Width: 10ms Function: Volume or Energy (scaled) Frequency: 1 pulse every preset number of units of energy or volume total Alarm (Not available iwht 4-20mA output) Type: 2 solid state opto-isolated relays which will sink up to 100mA, 30Vdc maximum. Function: High and low alarms individually programmable as unsigned values for flow rate, energy flow rate, feed tempertarue, return temperature or temperature difference. 4020mA Output Option Function: Volumetric flow rate, energy flow rate, feed or return temperature, Δt Accuracy: 0.1% Span: Programmable Load: Maximum of 300 ohms at 12v Meter-Bus Type: Conforms to CEN/TC176 meter bus standard Protocol: ICE 870-5 RS485 Data Transmitted: All data calculated can be transmitted Baud Rate: 300 to 9600 baud Parity: Odd, even or more Stop Bits: One or two Bus Address: Programmable for multiple instuments on the same bus Protocol: Modbus RTU IMPORTANT: Specifications are subject to change without notice Dimensions
