Calibration And Verification; Product Versions - INTEGRA Metering CALEC ST III User Manual

Product view
Temperature measurement
The CALEC® ST III is fitted with two highly accurate temperature measurement inputs. They are each con-
nected to type-approved, paired temperature sensors in two- or four-wire configuration. The planning of
systems should conform to heat meter standard EN 1434, parts 2 and 6. EN 1434-4 stipulates that only sen-
sors of the same design and length should be paired together.
The counter mechanism is available in either Pt 100, Pt 500 or Pt 1000 configuration.
Thermal energy is measured from a temperature difference from dT above (respectively below) 0 K. The
CALEC® ST III is the ideal solution for air-conditioning or cooling installations when used with appropriate
temperature sensors and flow meters for cooling.
3.3

Calibration and verification

In most countries energy metering systems used for commercial purposes are subject to compulsory verifi-
cation. The devices comprising the metering system must all possess official pattern approval. CALEC® ST III
has been approved according to both the European Measuring Instruments Directive 2014/32/EU and the
German PTB K 7.2 directive for cooling meters.
Officially verified heat and cooling meters must be reverified before the verification period has expired. The
operator is responsible for compliance with this requirement. (Re-)Verification includes all parts (tempera-
ture and flow sensors, calculator) forming the complete heat meter. The plug-in calculator minimizes the
cost of recalibration as the wiring does not have to be disconnected and device-specific data remain stored
in the configuration memory in the base of the housing.
The "IMP EBS" option makes it even easier to set up devices which require calibration, as the pulse value
and installation side can be set on-site.
AMBUS® WIN II can be used for parameterization, adjustment to new conditions and to read data from the
device. AMBUS® WIN II is available as a free download.
3.4

Product versions

The CALEC® ST III exists in two versions: CALEC® ST III Standard and CALEC® ST III Smart.
CALEC® ST III Standard
The main features of CALEC® ST III Standard are:
Standard applications
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Ultra-wide range power supply: 24 VAC – 240 VAC
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Sensor power supply: 2×3.6 V
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Common communication interfaces (up to 3)
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– 1× wireless communication on board (WM-Bus)
– 1× wired communication on board (M-Bus)
– 1× extension slot for adding options: KNX, LON, Wireless LoRa, 2AOU
2× inputs for temperature 2 / 4-wires (PT100 / 500 / 1000)
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2× master inputs (volume / status)
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– On the second input, pulse, volume, mass, energy, status and alarm can be selected as input.
– More inputs over slots possible
1× digital output
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– Pulses, limit 1, limit 2, alarm, M-Bus and test can be selected as output.
NFC and Bluetooth communication on-board for commissioning
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CALEC® ST III Smart
The main features of CALEC® ST III Smart are:
High end and extended applications
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Wide range power supply: 115 V / 240 V
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Sensor power supply 2×3.6 V and 24 V DC
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Various communication interfaces (up to 6)
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– 1× wireless communication on board (WM-Bus)
– 1× wired communication on board (M-Bus)
– 2× RS485 on board module configurable: M-Bus, Modbus, BACnet, N2Open
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