SHARKY 774 compact
COMPACT ENERGY METER | ULTRASONIC
The ultrasonic compact energy meter can be used for measuring the energy consumption in heating or cooling application for billing purposes. The measurement principle is static and based on the measurement of the transit time. Ultrasonic technology offers many benefits: no moving parts (avoids wear and tear of the metering components), low pressure loss, large metering dynamics and low start flowrate, insensitiveness to suspended particles.
- AMR Smart Meter
- M-Bus or wM-Bus Radio. Combined with Diehl Metering AMR System technology highest transmission performance is achievable
- Constantly high measuring rates (flow: 2 s; temp.: 16 s) with up to 12 years battery lifetime. Current power is calculated and updated every 2 s.
- AA-cells contain less lithium (0.7 g per piece) than A-cells.
- Springless battery contact (hard-solder) is corrosion-protected
- MID class 2 and PTB K7.2
- MID electromagnetic class E2 and mechanical class M2 – less sensitive to neg. influence, e.g. culprit PWM pump
- 8-digit LCD offers 3 fractional digits without risk of display overflow.
- Only 54 mm design hight from pipe center, hence easy to install in compact heat stations
Application Heating - cooling - heating/with cooling tariff Approval MID (DE-13-MI004-PTB008) and PTB K7.2 for cooling (DE-16-M-PTB-0041) Environmental class Class C Ambient class Class E2 + M2 Ambient operating temperature °C +5 ... +55 (<35 °C have a positive effect on battery lifetime) Ambient storage temperature °C -25 ... +60 (>35 °C max. 4 weeks) Communication M-Bus or radio Frequency band 868 or 434 MHz Type of radio telegram Open Metering Standard (OMS) Transmission data updating Online - no time delay between value measurement and data transmission Data transmission Unidirectional Sending interval Rapid mode (drive-by): 14 s + synchron telegram: 900 s | standard mode (walk-by): 64 s + synchron telegram: 900 s Test possibilities Via display, optical test pulses
Basic features - Calculator
Protection class IP 65 Battery supply 3.6 VDC (2xAA-cell), up to 12 years lifetime (at standard conditions of use and temperature) Battery1 lifetime - radio Rapid mode: up to 7 years; standard mode: up to 11 years (depends on sending interval) Battery1 lifetime - M-Bus Up to 12 years Temperature sensor type Pt 500, 2-wire; Ø 5.2 mm Cable length of temperature sensor m 1.45 / 1.95 Absolute temperature range (heating) Θ °C 1 ... 105 / 1 ... 130 Absolute temperature range (cooling) Θ °C 1 ... 50 Measuring cycle - flow T s 2 Measuring cycle - temperature sensor T s 16 Starting temperature difference ΔΘ K 0.125 Min. temperature difference ΔΘmin K 3 Max. temperature difference ΔΘmax K 90 / 120 (heating) | 50 (cooling) Interfaces standard Optical ZVEI interface Interfaces optional M-Bus or radio Extensive readable data memory Periodical log2; 3 history logs; event memory1 Battery exchangeable at lab
2 Programmable storage interval (daily, weekly, monthly, ...)
Basic features - Flow sensor
Mounting position flow sensor Any position, horizontal, riser or downpipe and overhead Protection class flow sensor Heating IP 54 | Heating with cooling tariff / cooling IP 68 (at normal ambient air pressure) Material of the flow sensor body Brass Temperature range heating °C 5 ... 105 / 5 ... 130 Temperature range cooling °C 2 ... 50 Temperature range heating with cooling tariff °C 5 ... 105 Dynamic range (qp/qi) 1:100 Useful range (qs/qp) 2:1
Display indication LCD, 8-digit Units MWh - kWh - GJ - °C - m³ Total values 99,999,999 - 9,999,999.9 - 999,999.99 - 99,999.999 Values displayed Energy - Power - Volume - Flow rate - Temperature and more
Optical ZVEI interface, for communication and testing, M-Bus protocol M-Bus Configurable telegram, according to EN13757-3, data reading via two wires with non polarity (1.5 m), auto baud detect (300 and 2400 baud), galvanically isolated, one M-Bus load Wireless M-Bus Open Metering Standard (OMS), Generation 3 Profile A or Generation 4 Profile B; frequency band 868 or 434 MHz
Technical data flow sensor
Nominal flow rate qp m³/h 0.6 1.5 1.5 2.5 Nominal diameter DN mm 15 15 20 20 Overall length L mm 110 110 130 130 Starting flow rate l/h 1 2.5 2.5 4 Minimum flow rate qi l/h 6 15 15 25 Maximum flow rate qs m³/h 1.2 3 3 5 Overload flow rate m³/h 2.5 4.6 4.6 6.7 Operating pressure PN bar 16 16 16 16 kv value (qp² (m³/h) = kv² x Δp (bar)) 1.95 4.33 5.48 7.91 Pressure loss at qp Δp mbar 95 120 75 100
Dimensions thread version
Nominal flow rate qp m³/h 0.6 1.5 1.5 2.5 Nominal diameter DN mm 15 15 20 20 Overall length L mm 110 110 130 130 Overall length with coupling L2 mm 190 190 230 230 Length of calculator L1 mm 90 90 90 90 Height H mm 14.5 14.5 18 18 Height H1 mm 55 55 58 58 Height of calculator H2 mm 27 27 27 27 Height of calculator H3 mm 40 40 40 40 Width of calculator B mm 135 135 135 135 Connection thread on meter Inch G¾B G¾B G1B G1B Connection thread of coupling Inch R½ R½ R¾ R¾ Weight kg 0.70 0.70 0.77 0.77
- Pressure loss graph / Typical error graph