212 Heat Calculator | Contrec Heat Meter

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

Display

Power

Physical

Inputs

OutputsDisplay

Dimensions

Downloads

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

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

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

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

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

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

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