Functionality
- KARAT-306 is ideal for buildings. The meter is simple to install, read and verify. KARAT-306 contributes to keeping the annual operating costs at a minimum with its unique combination of high measuring accuracy and long lifetime.
- KARAT-306 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-306 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-306 can be equipped by 3.6 V lithium battery, or powered by 24 VDC external power supply.
- KARAT-306 is equipped by optical interface and can have of the following four interfaces: RS-485, RS-232, M-Bus or LoRaWAN by order. Due to these modules remote data reading is possible.
- KARAT-306 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 |
| KARAT-306-01 | 2 | 2 | 0 |
| KARAT-306-02 | 5 | 2 | 0 |
| KARAT-306-03 | 5 | 4 | 0 |
| KARAT-306-04 | 5 | 4 | 4 |
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 | 0.7 kg excluding sensors and flow meter |
| Dimensions | 178x125x70 mm |