Description
The System-40 provides highly accurate thermal energy measurement in chilled water, hot water or condenser water systems. It is provided as a complete meter and includes a matched pair of platinum RTD temperature sensors and an integral inline ultrasonic flow sensor. It is available for use in ½” through 2½” piping systems with flow rates ranging from 0.03 to 250 GPM.
Application
Monitoring chilled water, hot water and condenser water in AHU and CRAC units for:
- Commercial office tenant billing
- Residential apartment and condominium tenant billing
Monitoring renewable energy resources for:
- Solar thermal applications
- Ground source heat pumps
- Geothermal heating systems
Features
- Reliable No-Moving-Parts Design –
- Wetted transducers measure the ultrasonic signal transit time differential, which correlates directly to the flow rate. The direct beam path orientation significantly enhances signal strength and long term reliability.
- Highly Accurate Over a Wide Flow Range –
- The flow sensor is accurate to within ±1% of reading over the normal (25:1 turndown)
- operating range and within ±2% of reading over an extended (100:1 turndown) range.
- User-Friendly Backlit Display –
- The bright, easy-to-read, backlit display uses “smart button technology” to simplify page navigation and programming. This eliminates the need for special configuration tools.
- Matched Platinum 1000Ω RTD Temperature Sensors
- Sensors are paired in a matching process that ensures a differential measurement uncertainty of better than ±0.18°F.
- Suitable for Water and Water/Glycol Solutions
- System-40 is field programmable for both water and water/glycol solutions to ensure accurate flow and energy measurement.
- Detachable Display
- The display for the system-40 is easily detached from the flow sensor. This allows for remote mount installation up to 5ft from the sensor body.
- Built-in Interval Data Logger
- Energy and volume totals are date/time stamped and logged within the meter along with other analytical data. This data is available via BACnet®.
- ACCURACY
- ±1% of reading over 25:1 turndown
- ±2% of reading over 100: 1 turndown
- Overall turndown exceeds 500: 1
- Repeatability: ≤±0.2%
- Meets EN1434 Class 1 accuracy requirements
- TEMPERATURE SENSORS
- Field serviceable MID certified matched pair of 2-wire 1000Ω platinum RTDs
- Calibrated to a differential measurement uncertainty of ±0.18°F
- Meets EN1434/C900.1 accuracy requirements for 3K sensors
- CALCULATOR
- Computation error: ≤ 0.09% at 30°F Δt
- Meets EN1434 Class 1 requirements with 3K minimum Δt
- PIPE SIZE RANGE
- ½ – 2½” nominal diameter
- PIPING SYSTEM CONNECTIONS
- Male NPT threads
- 2½” meter provided with ANSI Class 150 raised face flanges
- FLUID TEMPERATURE RANGE
- 32 to 250°F
- MAXIMUM OPERATING PRESSURE
- 400 psi
- PRESSURE DROP
- Less than 1 psi at 4 ft/s, decreasing at lower velocities
- MATERIALS
- Wetted components: Lead-free brass, PEEK
- Enclosure: Polycarbonate
- ENVIRONMENTAL
- Meets EN1434/C900.1 Class A requirements
- Operating Temperature Range: -13 to 131°F
- Storage Temperature Range: -14 to 158°F
- Enclosure Rating: IP65
- POWER SUPPLY REQUIREMENTS
- 20-28V AC/DC, 50/60 Hz, 5 VA maximum
- ISOLATED ANALOG OUTPUT
- Maybe programmable for energy rate, flow rate, supply temperature, return temperature or Δt
- Configurable as: 4-20mA, 0-5 V or 0-10 V output
- ISOLATED TOTALIZING SOLID STATE CONTACT CLOSURE PULSE OUTPUTS
- Maybe programmed for energy, volume, alarm indication, mode indication or MODBUS coil indication
- Contact ratings: 50 mA, 30 V
- Contact pulse duration: 50, 100, 500 or 1000 ms
- ISOLATED TOTALIZING PULSE INPUTS
- For use with sinking open collector or dry contact outputs
- Input rating: 30 VDC, 10 mA maximum
- Pulse duration: 50 ms minimum
- NETWORK CONNECTIONS
- Isolated RS485 serial interface
- COMMUNICATION PROTOCOLS
- BACnet® MS/TP per ASHRAE Standard 135.1: 2009
- MODBUS® RTU
- NETWORK CONFIGURATION & ADDRESSING
- Baud Rates: 4800, 9600, 19200, 38400, 76800, or 115200
- Device Address Range: 1 – 255 (1 – 247 MODBUS® RTU)
- Device Instance Range: 1 – 4,194,303 (BACnet® only)
- Parity: None, Even, Odd (MODBUS® RTU only)
Reference : https://www.onicon.com/products/system-40-btu-meter/
More info and price please contact marketing@wmablog.com
