ACI Transmitter Duct

Features

  • Two-wire, 4 to 20 mA loop-powered output signal with an optional 3-Wire voltage output signal available.
  • All transmitters include Zero and Span adjustments for field calibration and are calibrated using NIST Certified Calibration equipment.
  • The duct sensors include a foam pad to properly seal the duct and limit vibration once installed.
  • Optional NEMA/IP-rated weatherproof enclosures are available as specified on the back of the product datasheet.
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Automation Components, Inc. (ACI) creates, manufactures, and distributes building automation sensors for the heating, ventilation, and air conditioning (HVAC) Industry. Dpstar is ACI Authorised Distributor in Malaysia. Our product lines include Temperature Sensors, Relative Humidity Sensors, Current Sensors, Pressure Sensors, Gas Sensors, and Wireless Sensors.

The ACI Transmitter Duct Series features a two-wire, 4 to 20 mA loop-powered output signal with an optional 3-Wire voltage output signal available. All transmitters include Zero and Span adjustments for field calibration and are calibrated using NIST Certified Calibration equipment. ACI recommends the use of an 18 to 22 AWG shielded cable for all temperature transmitter installations to help eliminate the possibility of noise being introduced onto the signal lines. The sensor assemblies are manufactured using colored Etched Teflon lead wires and ACI’s proven double encapsulation process to eliminate the effects of moisture on the sensors as well as increase response times using our high-quality, thermally conductive epoxy. The duct sensors include a foam pad to properly seal the duct and limit vibration once installed. Optional NEMA/IP-rated weatherproof enclosures are available as specified on the back of the product datasheet. For best accuracy, ACI recommends the use of the A/TTM Series Matched transmitters with 3 or 5 Point NIST Calibration certificates since they include a second calibration step in which the RTD and transmitter are calibrated together as a system.

Applications

  • Roof Top Units
  • Air Handlers
  • Supply/Discharge/Return/Mixed Air Temperatures

The ACI Transmitters Duct Series is covered by ACI’s Five (5) Year Limited Warranty.

Specification

Transmitter Supply Voltage | Supply Current: +8.5 to 32 VDC (Reverse Polarity Protected) | 25 mA minimum
250 Ohm Load: +13.5 to 32 VDC | 500 Ohm Load: +18.5 to 32 VDC
Maximum Load Resistance (Terminal Voltage – 8.5 V) | 0.020 A
Output Signals Current: 4-20 mA (2-Wire Loop Powered) | Voltage: 1-5 VDC or 2-10 VDC (3-Wires)
Calibrated Accuracy | Linearity1 Temp. Spans < 500ºF (260ºC): +/- 0.2% | Temp. Spans > 500ºF (260ºC): +/- 0.5%
Temperature Drift2 Temp. Spans < 100ºF (38ºC): +/- 0.04%/ºF | Temp. Spans > 100ºF (38ºC): +/- 0.02%
TTM100/TTM1K Certification Points 3 Point NIST: 20%, 50% & 80% of span | 5 Point NIST: 20%, 35%, 50%, 65%, 80% of span
Warm Up Time | Warm Up Drift 10 Minutes | +/- 0.1%
Transmitter Operating Temperature Range -40ºF (-40ºC) to 185ºF (85ºC)
Operating Humidity Range 0 to 90%, non-condensing
Calibrated Temperature Spans1 Minimum Temp. Span: 50ºF (28ºC) | Maximum Temp. Span: 500ºF (260ºC)
Matched Calibrated Temperature Spans (A/TTM models) Range  -45 to 155ºC (-49 to 311ºF)
Connections | Wire Size Screw Terminal Blocks (Polarity Sensitive) | 16 AWG (1.31 mm2) to 26 AWG (0.129 mm2)
Terminal Block Torque Rating 0.37 ft-lb (0.5 Nm ) nominal
Sensor Type | Sensor Curve | Sensing Points Platinum RTD | PTC (Positive Temperature Coefficient) | One
Number Wires | Wire Colors Two | A/TT100/TTM100 Series: Brown/Brown | A/TT1K/TTM1K Series: Black/Black
Sensor Output @ 0°C (32°F) A/TT100/TTM100 Series: 100 Ohms nominal | A/TT1K/TTM1K Series: 1000 Ohms nominal
RTD Tolerance Class | Accuracy +/- 0.06% Class A | (Tolerance Formula: +/- ºC = (0.15ºC + (0.002 * |t|))
where |t| is the absolute value of Temperature above or below 0ºC in ºC)
Din Standard | Temperature Coefficient: DIN EN 60751 (IEC 751) | 3850 ppm / ºC
Sensor Stability +/- 0.03% after 1000 Hours @ 300ºC (572ºF)
Response Time (63% Step Change) 8 Seconds nominal
Sensor Operating Temperature Range -40 to 200ºC (-40 to 392ºF)
Enclosure Specifications (Operating Temperature, Material, Flammability, NEMA/IP Ratings) “-GD” Enclosure: Galvanized Steel, -40 to 121ºC (-40 to 250ºF), NEMA 1 (IP10)
“-PB” Enclosure: ABS Plastic, -30 to 90ºC (-22 to 194ºF), UL94-HB
“-BB” Enclosure: Aluminum, -40 to 121ºC (-40 to 250ºF), Plenum Rated, NEMA 3R
“-4X” Enclosure: Polystyrene Plastic, -40 to 70ºC (-40 to 158ºF), UL94-V2, NEMA 4X (IP 66)
Storage Temperature Range -40 to 85ºC (-40 to 185ºF)
Operating Humidity Range 10 to 90% RH, non-condensing
Probe Diameter | Probe Material 0.250” (6.35mm) | 304 Stainless Steel
Fitting Material | Flammability Rating Polyamide 66 (High Performance Nylon 66) | UL94-HB
Foam Pad Material | Flammability Rating Neoprene/EPDM/SBR Polymer | UL94-HBF; FMVSS-302; MIL-R-6130C
Lead Length | Conductor Size 14” (35.6 cm) | 22 AWG (0.65mm)
Lead Wire Insulation | Wire Rating Etched Teflon (PTFE) Colored Leads | Mil Spec 16878/4 Type E
Conductor Material Silver Plated Copper
Product Dimensions | Product Weight See table on back of Product Data sheet
Agency Approvals RoHS2, WEEE

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