The EF-x2000-B is a unique measurement device that can detect very small pressure differentials (as low as 0.0002” H2O) between two adjacent spaces by sensing the airflow rate induced by the pressure gradient. The EF-x2000-B can be used to determine the airflow rate across fixed openings when a reference airflow rate is provided.
Probe and Sensor Node Configurations
1 bi-directional, dual 1/2” NPT female bleed sensor housing
Installed Airflow Accuracy
Airflow through an opening or across an obstruction: Requires field measurement of a reference airflow of the specific installation.
The Field Adjust Wizard (FAW) facilitates setup.
Equivalent pressure between two adjacent spaces: Requires field measurement of a reference pressure to correct the default flow
coefficient of the specific installation. The Field Adjust Wizard (FAW) facilitates setup.
Listings and Compliance
UL: : 60730-1, 60730-2-9; CAN E60730-1, E60730-2-9 (EF-A2000-B Only)
FCC: This device complies with Part 15 of the FCC rules
RoHS: This device is RoHS2 compliant
Environmental Limits
Temperature:
Sensor: -2,000 to 2,000 fpm [-10.16 to 10.16 m/s] -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]Sensor: -3,000 to 3,000 fpm [-15.24 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 C]Humidity: (non-condensing)
Probes: 0 to 100%
Transmitter: 5 to 95%
Sensing Node Sensors
Self-heated sensor: Two precision, hermetically sealed, bead-in-glass thermistor probes
Temperature sensor: One precision, hermetically sealed, bead-in-glass thermistor probe
Sensing Node Housing
Material: Glass-filled Polypropylene
Sensor Potting Materials: Waterproof marine epoxy
Airflow Measurement
Accuracy: ±2% of reading to NIST-traceable airflow standards (includes transmitter uncertainty)
Calibrated Range: -3,000 to 3,000 fpm [-15.24 to 15.24 m/s]Calibration Points: 9
Temperature Measurement
Accuracy: ±0.15 ⁰F [0.08 ⁰C] to NIST-traceable temperature standards (includes transmitter uncertainty)
Calibrated Range: -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]Calibration Points: 3
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 equivalent ∆P, AO2=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 (or Pressure) Alarm
Type: Low and/or high user defined setpoint alarm
Tolerance: User defined setpoint value
Delay: User defined
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
