Advantage III

Gold Series
GTx108-F / An
Fan Array Airflow Measurement with Temperature & Alarm Capability
GTx108-F_Alt
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Advantage III

Gold Series
GTx108-F / An
Fan Array Airflow Measurement with Temperature & Alarm Capability

The GTx108-F/An is EBTRON’s solution for accurate and repeatable airflow measurement in fan arrays. One to eight fans are supported. Airflow, temperature and/or airflow alarming are available on all models. Individual fan airflow rates and fan alarming are available with combination analog output/network models. Does not affect fan performance of sensitive plenum fans.

  • Thermal Dispersion Technology
  • Supports up to 8 Fans
  • NIST‐traceable Calibration
  • %‐of‐reading Accuracy
  • Individual Fan Airflow Alarms
  • Temperature Output Capability
  • Combination Analog/Network Models
  • Face, Forward and Flare Mounting
  • Remote Transmitter with LCD Display
  • 3-year Warranty

Typical Applications

  • Fan Airflow Tracking
  • Air Change Verification & Monitoring
  • Individual Fan Performance Monitoring & Fault Detection

Benefits

  • Monitor up to 8 Fans with a Single Transmitter
  • Demonstrate Fan Performance and Operation
  • Improve Fan Tracking of VAV Systems
  • Comply with ASHRAE Standards
  • Save Energy
  • Reduce Fan Horsepower

Product Highlights

  • Accurate and Repeatable
  • Long-term Stability
  • Streamline Design
  • Individual Fan Airflow Monitoring & Alarming
  • Adjustable Mounting Brackets
  • “Plug and Play” Operation
  • FEP Plenum Rated Cables

General

Probe and Sensor Node Configurations

Fan Arrays (less than or equal to 4 fans): 2 probes x 1 sensor node per probe or 1 probe x 1 sensor node per probe in each fan
Fan Arrays (greater than 4 fans): 1 probe x 1 sensor node per probe in each fan (8 probe maximum)

Sensor Node Averaging Method

Airflow: Independent, arithmetic average per fan
Temperature: Independent, velocity weighted or arithmetic average

Listings

UL: UL 873 Listed
BACnet International: BTL Listed (GTC108 and GTM108 transmitters)

Environmental Limits

Temperature:
Probes: -20 to 160 ⁰F [-28.9 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
Temperature sensor: Precision, hermetically sealed, bead-in-glass thermistor

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: 0 to 10,000 fpm [0. to 50.8 m/s]
Calibration Points: 16

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

Sensor Probe Assembly

Mounting Rods

Material: Zinc plated steel

Mounting Brackets

Material: 304 stainless steel

Mounting Options & Size Limits

Forward: 6 to 64 inches [152.4 to 1676.4 mm] (diameter at inlet entrance)
Face: 11 to 77 inches [152.4 to 1625.6 mm] (diameter at inlet entrance)
Flare: 6 to 57 inches [279.4 to 1955.8 mm] (opening size at backdraft damper inlet)

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: 9/16” [14.29 mm] nominal diameter with gold-plated connector pins

Transmitter

Power Requirement:

24 VAC (22.8 to 26.4 under load) @16V-A

Connector Receptacle Pins and PCB Connections:

Gold-plated receptacle pins, PCB interconnects, PCB edge fingers, and test points

User Interface:

16-character LCD display and 4 button interface

B.A.S. Connectivity Options

GTC108 Transmitter: Two field selectable (0-5/0-10 VDC or 4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm) plus one field selectable (BACnet MS/TP or Modbus RTU) and isolated RS-485 network connection- Individual sensor node airflow rates and temperatures are available via the network – Individual fan airflow rates are available via the network
GTM108 Transmitter: Two field selectable (0-5/0-10 VDC or 4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm) plus one isolated Ethernet (simultaneously supported BACnet Ethernet or BACnet IP, Modbus TCP and TCP/IP) network connection – Individual sensor node airflow rates and temperatures are available via the network – Individual fan airflow rates are available via the network
GTL108 Transmitter: One isolated Lonworks Free Topology network connection – Individual fan airflow rates and temperatures are NOT available via the network on multiple fan systems
GTD108 Transmitter: One USB connection for thumb drive datalogging of sensor airflow and temperature over specified time intervals

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 (GTM108 and GTC108 only)
Analog Signal Indication: Yes, on AO2 assignment

Fan Alarm

Type: Minimum airflow, % deviation from median airflow, or % deviation from maximum airflow stored in memory
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 (GTM108 and GTC108 only)
Analog Signal Indication: Yes, on AO2 assignment

System Status Alarm

Type: Sensor diagnostic system trouble indication
Visual Indication: Yes, LCD display
Network Indication: Yes
Analog Signal Indication: Yes, on AO2 assignment

EB-Link Infra-red Interface (with /EL option): Provides individual airflow and temperature data to an EB-Link Reader

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