HEAT ENERGY METER WR200-F for liquid heat carriers
Heat energy meter for steam
Heat transfer water or other liquids
Temperature range -50…0…+250 °C
Any flow sensor with analog signal connectable
2 x Pt100 inputs for advantages and return temperature
Exact k-value calculation for IAPWS-IF97
Backlit alphanumeric LCD display (4 x 20 characters)
Built-in clock with automatic calendar to 2099
Counter for heat and flow resettable
Counters for variable periods
4 analog 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 F is used for detecting the heat energy in closed heating or cooling systems with liquid heat transfer medium. The instantaneous heat capacity is calculated using the formula:
P = QV ΔT * k
with
P = heat output in kW
QV = flow in m3 / h
ΔT = temperature difference between flow and return temperature
k = thermal coefficient in kWh/m3 · °C
subsequently, the actual flow and the current.
Thermal power integrated over time and added up to two counters. For counting on an adjustable period of two resettable counters in conjunction with a clock with automatic calendar are available. All measuring and counts are displayed on a backlit four-line LCD display with its physical unit.
Water as a heat carrier may, however, other fluids (water-glycol mixtures, heat transfer oil) are used. The thermal coefficients of water are stored in the unit for a temperature range of 250 °C.
The heat energy meter is provided for connection of any flow sensor with analog output. 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.
Operating mode:
Measuring mode
Measured material:
Fluids e.g. Water, water-glycol mixtures, heat transfer oil
Measuring transducer:
Pt100
Temperature range:
-50 … 0 … + 250 ° C
Temperature inputs:
2 x Pt100 in four-wire circuit for supply and return temperature, No line matching required
Curve:
Linear or radically
K value:
Determination according to data from IAPWS-IF97
M-Bus (Optional):
M-Bus Logger M-Count2C
Outputs:
4 analog outputs 0/4 … 20 mA for the following instantaneous values: flow temperature, return temperature, flow, heat output
2 pulse outputs for heat quantity and flow rate
Counters:
9 digits for the summation of heat quantity and flow rate
Period Counting:
9-digit resettable counters, period adjustable via built-in clock and calendar
Clock::
Built-in clock with automatic calendar up to 2099
Buffer battery:
Lithium battery keeps the accumulated counts in the event of a power failure
Default:
Housing: Aluminum profile housing for mounting on a 35 mm standard profile rail
Dimensions: 134 x 106 x 72 mm (WxHxD)
Protection class: front IP 54 / terminal side IP 20 according to EN 60529
Wall mounting housing:
Housing: plastic polystyrene with hinged clear front cover,
Dimensions: Dimensions 218 x 166 x 112.5 mm (WxHxD)
Protection class: Front IP 54 according to EN 60529
Table setting:
Mounting kit consisting of front frame, mounting rods and fastening screws
Weight:
Approx. 600 g, wall mounting unit approx. 1.5 kg
Power supply:
230 Vac (± 15%)
Power consumption:
Approx. 4 VA
Output voltage:
Approx. 18 Vdc
Output Current:
0 / 4..20 mA, direct supply of a two-phase transmitter
EMC:
EN 61000-6-2, EN 61000-6-3, CE-mark
RoHS:
according RoHS-directive 2011/65/EU
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