The EF-x2000-U is a cost effective measurement solution for smaller rooftop packaged units, fan coils and classroom ventilators. Available with adjustable standoff or insertion mount universal probes. Dual airflow output capability makes it ideal for outdoor air and exhaust airflow measurement in RTUs with powered exhaust and in energy/heat recovery ventilators.
EB-Flow
Series 2000
EF-x2000-UAirflow Measurement with Temperature and Alarm Capability
EF-x2000-U System
EB-Flow
Series 2000
EF-x2000-UAirflow Measurement with Temperature and Alarm Capability
- Thermal Dispersion Technology
- Single or Dual Airflow Output
- NIST‐traceable Calibration
- %‐of‐reading Accuracy
- Airflow and Status Alarm
- Temperature Output Capability
- Analog and RS‐485 Output Models
- Two Universal Mounting Styles
- Remote Transmitter with LCD Display
- 3‐year Warranty
Typical Applications
- Smaller RTU (≤12.5 tons) Outdoor Air Delivery Monitoring & Powered Exhaust Tracking
- ERV/HRV Outdoor Air & Exhaust Air Monitoring
- Classroom Unit Ventilator Outdoor Air Delivery Monitoring
Benefits
- Demonstrate Proper Outdoor Air Delivery
- Maintain Pressurization
- Satisfy LEED Prerequisites and Credits
- Provide Acceptable IAQ
- Save Energy
- Reduce Liability
- Improve Performance
Product Highlights
- Universal Mounting
- Adjustable Brackets
- Low Airflow Capability
- Long-term Stability
- Unsurpassed Quality
- “Plug-and-Play” Operation
- Intuitive User Interface
- Waterproof Sensor Assembly
- FEP Plenum Rated Cables
General
Probe and Sensor Node Configurations
1 probe x 1 sensor node
2 probes x 1 sensor node/probe
Installed Airflow Accuracy¹
Typically better than ±10% of reading
Sensor Node Averaging Method
Airflow: Independent (arithmetic average on 2 sensor configurations installed at a single measurement location)
Temperature: Independent (velocity weighted or arithmetic average on 2 sensor configurations installed at a single measurement location)
Listings
UL: 60730-1; UL 60730-2-9 (HVAC Controls)
Environmental Limits
Temperature:
Probes: 0 to 2,000 fpm [0 to 10.16 m/s]: -20 to 160 ⁰F [-28.9 to 71.1 ⁰F]
Probes: 0 to 3,000 fpm [0 to 15.24 m/s]: 0 to 160 ⁰F [-17.8 to 71.1 ⁰C]
Transmitter: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]
Humidity: (non-condensing)
Probes: 0 to 100%
Transmitter: 5 to 95%
Individual Sensing Nodes
Sensing Node Sensors
Self-heated sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Temperature sensor: High-performance encapsulated chip thermistor with parylene coating
Sensing Node Housing
Material: Glass-filled Polypropylene
Sensor Potting Materials: Waterproof marine epoxy
Sensing Node Internal Wiring
Type: Kynar® coated copper
Airflow Measurement
Accuracy: ±3% of reading (typical), 4% max. to NIST-traceable airflow standards (includes transmitter uncertainty)
Calibrated Range: 0 to 3,000 fpm [0 to 15.24 m/s]
Calibration Points: 7
Temperature Measurement
Accuracy: ±0.36⁰F [0.2 ⁰C]
Sensor Probe Assembly
Tube
Material: Mill finish 6063 aluminum
Mounting Brackets
Material: 304 stainless steel
Mounting Options & Overall Probe Length
Insertion: 6, 8 or 16 in. [152.4, 203.2 or 406.4 mm] (adjustable)
Stand-off: 6, 8 or 16 in. [152.4, 203.2 or 406.4 mm] (adjustable)
Probe to Transmitter Cables
Type: FEP jacket, plenum rated CMP/CL2P, UL/cUL listed, -67 to 392 ⁰F [-55 to 200 ⁰C], UV tolerant
Standard Lengths: 10, 25 and 50 ft. [3.1, 7.6 and 15.2 m]
Connecting Plug: 0.60” [15.24 mm] nominal diameter
Transmitter
Power Requirement: 24 VAC (22.8 to 26.4 under load) @8V-A
User Interface: 16-character LCD display and 4 button interface
B.A.S. Connectivity Options
EF-A2000 Transmitter: Two field selectable (0-5/1-5/0-10/2-10 VDC), scalable and protected analog output signals (AO1=airflow or airflow 1, AO2=airflow 2, temperature or alarm)
* The VDC output circuit of the EF-A2000 transmitter can drive the input circuit of devices designed to measure 4-wire current loops with a resistive load ≥250 ohms.
EF-N2000 Transmitter: One field selectable (BACnet MS/TP or Modbus RTU) and non-isolated RS-485 network connection – Individual sensor node airflow rates and temperatures are available via the network (provide individual 24 VAC transformers for each EF-N2000 transmitter for applications requiring isolated RS-485)
Relay
Type: Dry Contact w/ onboard jumper to drive a remote LED (R1=alarm)
Status: N.O. or N.C. via user setup configuration
Rating: 30 VDC or 24 VAC @ 3 amp. max.
Airflow Alarm
Type: Low and/or high user defined setpoint alarm
Tolerance: User defined % of setpoint
Delay: User defined
Zero Disable: Alarm can be disabled when the airflow rate falls below the low limit cutoff value (unoccupied periods)
Reset Method: Manual or automatic
Visual Indication: Yes, LCD display
Network Indication: Yes (EF-N2000 only)
Analog Signal Indication: Yes, on AO2 assignment (EF-A2000 only)
Contact Closure Relay: Yes, on R1 assignment
System Status Alarm
Type: Sensor diagnostic system trouble indication
Visual Indication: Yes, LCD display
Network Indication: Yes (EF-N2000 only)
Analog Signal Indication: Yes, on AO2 assignment (EF-A2000 only)
Contact Closure Relay: Yes, on R1 assignment
¹Installed airflow accuracy is the actual system accuracy expected and includes sampling uncertainty of the sensor probes when installation meets or exceeds placement guidelines.
