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.
Probe and Sensor Node Configurations
1 probe x 1 sensor node
2 probes x 1 sensor node/probe
Installed Airflow Accuracy¹
≤ 8 sq.ft. [0.74 sq.m.]:±(3% to 15%), typical (increases with increasing opening size). May be improved by field adjustment using the Field Adjust Wizard (FAW) to a reliable reference.
> 8 sq.ft. [0.74 sq.m.]: Not recommended.
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 and Compliance
UL: 60730-1, 60730-2-9; CAN E60730-1, E60730-2-9 (EF-A2000-U Only)
FCC: This device complies with Part 15 of the FCC rules
RoHS: This device id RoHS2 compliant
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%
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: ±0.15 ⁰F [0.08 ⁰C] to NIST-traceable temperature standards (includes transmitter uncertainty)
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 302 ⁰F [-55 to 150 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
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.
