data sheet WR200D - 2 Pages

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data sheet WR200D

Catalog excerpts

HEAT ENERGY METER WR200-D for steam □ Heat transfer steam □ Temperature range 100... 600 °C □ 1...100 bar pressure range □ Pressure input mA 0/4...20 □ Any flow sensor with analogue signal connected □ 2 x Pt100 inputs for steam and condensate temperature □ Coefficient calculation for IAPWS-IF97 □ Backlit alphanumeric LCD display (4 x 20 characters) □ Built-in clock with automatic calendar to 2099 □ Counter for heat and steam □ Resettable counters for variable periods □ 4 analogue outputs for instantaneous values □ 2 pulse outputs for M-Bus connection (optional) □ Housing for snap-rail or wall mounting (IP55) □ Accessories for panel installation Description The heat meters WR 200-D is used for detecting the heat energy in heating or steam production systems as a heat carrier. The heat output from given in a closed system (steam condensate flowing back) is calculated using the formula: P = Qm ■ (r + ATD ■ cpd + ATK ■ cpK) / 3600 with P    = heat output in kW Qm    = steam flow in kg / h r    = heat of vaporization in kJ / kg ATD = temperature difference between steam temperature and saturation temperature CPD = specific heat capacity of vapor in kJ / kg ■ ° K ATK = temperature difference between saturation temperature and condensate temperature cpK = specific heat capacity of water in kJ / kg ■ ° K Dimensions (mm) rail housing subsequently, the actual flow and the current thermal power integrated over time and added up to two counters. For counting on an adjustable period, two other resettable counters in conjunction with a clock with automatic calendar available. All measured and counted values are displayed with their physical units on an illuminated four-line alphanumeric LCD display. The thermal coefficients of water and steam are calculated according to IAPWS-IF97 for a pressure range of 1...100 bar and a temperature range of 0...600 °C. The meter is for the connection of any flow sensor with analog signal provided. For the pressure measurement, a further analogue input is available 0/4...20 mA. For temperature measurement two Pt100 inputs are available in four-wire circuit. External records, the unit provides four analog output signals 0/4.20 mA and two pulse outputs can be connected to an M-bus module. All components are housed in a housing profile for snap track mounting with external clamps. Accessories for panel mounting parts and a plastic housing for wall construction are also available. Dimensions (mm) wall constuction Arthur Grillo GmbH • Am Sandbach 7 • 40878 Ratingen • phone 0 21 02 - 47 10 22 • fax 0 21 02 - 47 58 82 www.grillo-messgeraete.de/en • Email: info@grillo-messgeraete.de • web shop: www.sensor-store.

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HEAT ENERGY METER WR200-D for steam Operating Mode: Measured material: Measuring transducer: Temperature range: Temperature inputs: Curve: K value: M-Bus (Optional): Outputs: Counters Period Counting Clock Buffer battery TECHNICAL SPECIFICATIONS: Measuring mode Steam Pt100 -50 ... 0 ... + 250 ° C 2 x Pt100 in four-wire circuit for supply and return temperature, No line matching required Linear or radically Determination according to data from IAPWS-IF97 M-Bus Logger M-Count2C 4 analog outputs 0/4 ... 20 mA for the following instantaneous values: steam pressure, steam temperature, steam...

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