Functionality
- KARAT-307 is ideal for buildings and industries using extra communication possibilities, programmable functions and a wide range of other modules.
- The meter is simple to install, read and verify.
- KARAT-307 contributes to keeping the annual operating costs at a minimum with its unique combination of high measuring accuracy and long lifetime.
- KARAT-307 has a leakage control function. This function is available in case the calculator is connected to flow meters installed in both inlet and outlet pipes.
- KARAT-307 receives volume pulses from connected flow meters and calculates energy for every predetermined water volume. The energy calculation includes temperature measurements in inlet and outlet pipes.
- KARAT-307 can be equipped by 3.6 V lithium battery, or powered by 24 VDC external power supply.
- KARAT-307 is equipped by optical interface and one of the following four interfaces: RS-485, RS-232, M-Bus or LoRaWAN. . Due to these modules remote data reading is possible.
- KARAT-307 calculates energy according to the formula described in EN 1434-1:2011.
The energy calculation in a simplified way be expressed as:
Energy = V x ∆Θ x k.
V is the supplied water volume
∆Θ is the temperature difference measured
k is the thermal coefficient of water
Models
Maximum number of sensors to be connected | |||
Model | Consumption sensors/ Electric power meter | Temperature sensors | Pressure sensors |
КАРАТ-307-4V4T0P | 4 | 4 | 0 |
КАРАТ-307-4V4T4P | 4 | 4 | 4 |
КАРАТ-307-6V6T6P | 6 | 6 | 6 |
Meter data
Temperature range, θ | −50°C… +150 °C |
Differential range, ∆Θ | 3...147 K |
Accuracy | ±(0,5 + ∆Θmin/∆Θ)% |
Temperature sensors | Pt100, Pt500 |
Types of meters with a pulse output, which can be connected to KARAT-306 |
– KARAT-520
– Electronic meters with passive pulse output – Mechanical meters with reed switch |
Data logger | 1536 hours, 1456 days, 48 months, 4 years, 1008 events |
Mechanical data
Environmental class | Meets EN 1434 Class A and C |
Ambient temperature | 1…55 °C non condensing, closed location (indoor installation) |
Protection class | IP65 |
Storage temperature | -25…50 °C |
Weight | 1.2 kg excluding sensors and flow meter |
Dimensions | 234x172x70 mm |