QALCOSONIC HEAT 2

  • Number of flow channels
  • Nominal Pressure
    PN16 or PN25
  • Protection class of flow sensor
    IP65 (IP67/IP68 – on request)
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Ultrasonic heat and water quantity counter is designed for thermal energy and water quantity measurements in closed-type heating and cooling systems as well as for thermal energy and water quantity measurements in open-type heating systems and measurements of various liquid quantities.

ADVANTAGES:

Cold water temperature constant may be individually programmed for every month.

Possibility of integrated control or alarm function.

Internal measurement data archive: for daily records – up to 33 months, for hourly records – up to 3.5 months.

General Specification

TEMPERATURE MEASUREMENT

Number of measurement channels  1, 2 or 3
Temperature measurement limits 0 to 180°C
Temperature difference measurement limits  2 K ... 150 K or 3…150 K
Type of temperature sensors 

Pt500 or Pt1000

Connection scheme  four-wire or two-wire
Canble length 

four-wire : 10 m; 15 m.; 20m.; 40 m.; 60 m; 80 m; 100 m

.two-wire : 3 m; 5 m.

Display resolutions for temperature and temperature difference  0.1°C

PRESSURE MEASUREMENT

Pressure measurement channels Up to 2
Input current limits (Programmable) 0 ... 5 mA, 0...20 mA, 4 ... 20 mA
Lower pressure measurement limits (programable)  0 ... 2500 kPa
Upper pressure measurement limits (programable)  100 ... 2500 kPa
Error <0.25%
FLOW MEASUREMENT 
Channels 2
Pulse inputs 2
Cable length

3 m.; 5 m.; 10 m.; 15m.; 20m.; 40m.; 60m.; 80m.; 100m.

Nominal pressure PN16 or PN25

COMMUNICATION INTERFACES

Optical Communication  according to EN 61107 (IEC 1107)
Number of plug-in (optional) interface modules 1
Available types of plug-in interface modules

M-bus

M-bus/CL/RS232 and 2 pulse outputs (230V power supply)

M-bus/CL/RS232 and 2 current outputs (230V power supply)

RS232

RS485

Wireless 868 MHz

MODBUS

MiniBus

RF868MHz

POWER SUPPLY OPTIONS

Internal Battery 3,6 V lifetime >12 Years
Optional AC source supply   230 V, AC 50 Hz

ENVIRONMENT CONDITIONS

Ambient tamperature 

Calculator: 5°C to 55°C

Flow sensor: -33°C to 55°C

 
Environment class  Class C according to LST EN1434, M1; E2
Protection class 

Calculator: IP65

Flow Sensor: IP67 /IP68

Mounting Standard DIN- rail

Energy Metering in the buildings

Power stations

District cooling plants