Clark Sonic Ultrasonic Products
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Clark Sonic Ultrasonic Products - 1

www.clarksol.com m Model DIM-EM BTU/Energy Monitor clark Energy Monitoring of Heating or Cooling Systems, 114", 318", 112" & 314" Pipe DESCRIPTION The DN-EM is an economical energy flow monitor intended for applications in energy transfer and heat-ing/cooling systems where energy use requires measurement. In heat exchange loops the DN-EM internally calculates the energy gained or lost by the heat exchanger. The energy is cakulated based on the the mass volume rate and the difference in temperature between the supply and return lines. The volume of liquid is measured by means of a pulse generating vortex flow transmitter. A RTD sensor built into the flowmeter (T^ measures temperature at the meter and the remote temperature (T2) is measured by means of a precision RTD sensor mounted in a pipe tee. A scaled pulse output is provided and can be configured to report volume flow rate, mass flow rate or energy total. Modbus 485 communications provides an interface with a building automation or monitoring system. The unit contains non-volatile memory that records flow, mass flow and energy, and is updated every ten minutes. However, when flow, mass or energy totals are read, the reported values are true current values; the last stored value is added to the current accumulated value when the applicable register is read. The default medium for the DN-EM is water. Other media consisting of water and a certain percentage of glycol up to 60% can be field configured. FEATURES -COMPENSATED TEMPERATURE MEASUREMENT -ACCURATE FLOW MEASUREMENT -COMPENSATED FOR SPECIFIC HEAT OF A RANGE OF GLYCOLS Table 2- Models SPECIFICATIONS Medium: Suitable for water & water glycol based heat exchange systems and other liquids compatible with the materials of construction (consult factory). For media with viscosity greater than 2 millipascal sec onds (2 centipoise), higher flow rates are required to form vortices raising the minimum measurable flow rate value. Flow ranges: From 0.25 to 22.5 GPM, See Table 2 Temperature measurement: 3-wire,1000 Ohm RTD 1 RTD imbedded in flow sensor 1 RTD packaged in a 1/4" x 2.5" stainless steel sheath with 1/2" NPT brass adjustable compression fitting for mounting in a 1/2" or 3/4" pipe Tee; supplied connected to energy monitor with 10 ft of 3-wire RTD cable Model Pipe Size Full Scale Range (Gal/min) Full Scale Range (l/min) Flow Pulse Output Configuration (Pulses/Gallon Flow Formula (Q=Flow in GPM) Max. Pressure Drop (PSI) DNEM8 1/4" 0.25 to 4.00 0.9-15.0 7200 Q=.00833xFreq. 2.9 DNEM10 3/8" 0.50 to 8.00 1.8-32.0 3600 Q=.01667xFreq. DNEM15 1/2" 0.90 to 13.20 3.5 to 50.0 2000 Q= 0.06 x Freq. DNEM20 3/4" 1.30 to 22.50 5.0 to 85.0 1200 Q= 0.1 x Freq. Max. test pressure: 261 psi/18 bar at 104oF/40 °C Loss of pressure / cavitation: A minimum inlet pressure of 10.2 psi (0.7 bars) is required to avoid cavitation issues at maximum flow. Wetted materials: Flow sensor and bluff: ASTM- PPA, Polyphthalamide ISO-PA6T/6I, Grivory 40%GF Sensor vane: ETFE Sealing material: EPDM Flow Accuracy: Up to 50% fs: <1% fs From 50% fs: < 2% of measured value Temperature measurement accuracy: Reported supply & return temperatures are per PT1000, DIN EN 60751 Class B. Temperature differͭence used in energy calculation is product of matched pair RTD s calibrated at factory to report temperature difference to ±(0.1 + 0.002*T) Degs C. Operating Differential Temperature Range: 3oC to 91oC (5.4 to 164oF), consult factory for other. Pipe Tee is an ordering option, see Table 11 Temperature: Ambient: 5° to185oF (-15° to +85°C) In storage: -22oto 185oF (-30oto +85°C) Max. pressures and liquid temperature: See Table 1 Table 1- Maximum Operating Pressure & Temperature psi bar oF oC Duration 174 12 104 40 Lifetime 100 6.89 200 93.3 Lifetime 87 6 212 100 Lifetime 58 4 257 125 600 hours 58 4 284 140 2 hours Clark Solutions 10 Brent Drive Օ Hudson, MA 01749 Tel. 978 / 568 3400 Օ Fax 978 / 568 0060

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Clark Sonic Ultrasonic Products - 2

System accuracy: EN1434-1, Class 2 & 3 (see Table 3) Protection class: NEMA 4X (IP65) Mounting position: Flow direction is identified by an arrow on flowmeter body. Otherwise the flowme- ter mounting orientation is universal. Units of Measurement: Factory set or Field programmable Flow Rate: Gals/Min, Liters/Min, Liters/Sec Mass Flow: Lbs/Min, Kgs/Min Energy Rate: BTU/Min, kBTU/Min, kBTU/Hr, KW Total Flow: Gals, Liters, Cubic Meters Total Energy: kBTU, KW-HRS Temperature: oF, oC Output Update Rate: 2 seconds Power: 12 to 30 VDC Current Consumption: < 10 mA Pulse Output: Can be factory set...

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Clark Sonic Ultrasonic Products - 3

2306A_10.qxd table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:7.00pt "Arial", sans-serif; } .font2 { font:10.00pt "Arial", sans-serif; } .font3 { font:6.00pt "Arial Black", sans-serif; } Table 5- Setup Functions, Write Data Registers Variable Register Number # Registers Function Code Data Type Description SET FLOW RATE UNITS 40101 06 WORD UNITS OF FLOW RATE; 0 = G/M, 1 = L/M, 2 = L/SEC SET ENERGY RATE UNITS 40102 06 WORD UNITS OF ENERGY RATE; 3 = BTU/M, 4 = KBTU/M, 5 = KBTU/HR, 6 = KW SET MASS FLOW RATE UNITS 40103 06...

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Clark Sonic Ultrasonic Products - 4

2306A_10.qxd table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:6.00pt "Arial", sans-serif; } .font1 { font:9.00pt "Arial", sans-serif; } .font2 { font:10.00pt "Arial", sans-serif; } Table 8- Flow Constants When Pulse Output Is Programed To Report Flow Flow Constants for 1/2" Monitor Unit Pulse/Unit Flow Rate GAL/MIN 1000 P/G GAL/MIN= .06xFREQ LITER/MIN 300 P/L LITER/MIN= .2xFREQ LITER/SEC 15,000 P/L LITER/SEC= .004xFREQ LB/MIN 120 P/LB LB/MIN= .5xFREQ KG/MIN 80 P/KG KG/MIN= .75xFREQ Flow Constants for 3/4" Monitor Unit Pulse/Unit Flow Rate GAL/MIN 600 P/G...

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Clark Sonic Ultrasonic Products - 5

ELECTRICAL RS-485: 3-conductor cable Red: TXD1 Black: TXDO Green or Clear: GND Power & NPN TransistorOut: 4-conductor cable Red (+):Vln 12to30 VDC Black (-): Vln Return Green : OPTO NPN E White: OPTO NPN C NPN Ooto-lsaated Swtch Output 2Q 3Q *C. F-30VDC C Optiorwl Model 43-119. RS-485 Converterfor Corn mission Ing from a PC: PC End; DB9 Frule RS-485 End: Terminal Blod Terminal Block Connections to DN-EM: Black: TD(A)-Red:TD(BH Clear or Green: Gnd 9 ■Au Cuwt &:m* ORDERING INFORMATION Note: NPN Opto Isolated swltch output (Order code I) and Vo Powered Puise Output (order code V) are Jumper...

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