MELAG DAC Premium Plus - Technical Specifications and Tables; Feed Water Quality Requirements; Sensor and Measuring Chain Performance

6 Technical tables
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6 Technical tables
Feed water quality
Minimum requirements to the feed water following EN 13060, Appendix C
Substance/property Feed water
Evaporation residue ≤10mg/l
Silicon oxide, SiO
2
≤1mg/l
Iron ≤0.2mg/l
Cadmium ≤0.005mg/l
Lead ≤0.05mg/l
Traces of heavy metal apart from
iron, cadmium, lead
≤0.1mg/l
Chloride ≤2mg/l
Phosphate ≤0.5mg/l
pH value 5 - 7.5
Appearance ≤ colourless, clear, without sediments
Hardness ≤0.02mmol/l
Precision and drift behaviour
Sensors
Temperature sensors
Sensor type PT 1000 Class A according to DINEN60751
Precision (at 135°C) ±0.42K
Drift per year ±0.05K
Drift in 5 years ±0.25K
Pressure sensor
Sensor type Piezoresistant absolute pressure sensor 0 to 4000mbar
Precision ±0.3% corresponds to ±12mbar corresponds to approx. ±0.13K steam
Drift per year ±0.2% corresponds to ±8mbar corresponds to approx. ±0.09K steam
Drift in 5 years ±1.0% corresponds to ±40mbar corresponds to approx. ±0.44K steam
Measuring chains
Measuring chain for the temperature measurement on the electronics (without sensor)
Precision (at 135°C) ±0.2K
Drift per year ±0.005K
Drift in 5 years ±0.025K
Measuring chain for the pressure measurement on the electronics (without sensor)
Precision ±0.2% corresponds to ±8.0mbar corresponds to approx. ±0.09K steam
Drift per year ±0.004% corresponds to ±0.16mbar corresponds to approx. ±0.017K steam
Drift in 5 years ±0.02% corresponds to ±0.8mbar corresponds to approx. ±0.09K steam