ACI Transmitter Immersion

Features

  • Two-wire, 4 to 20 mA loop-powered output signal with an optional three-wire voltage output signal available.
  • All transmitters include Zero and Span adjustments for field calibration and are calibrated using NIST Certified Calibration equipment.
  • The immersion sensors “-I” include a welded thermowell but can be ordered without the thermowell “-INW” version.
  • The “-INW” includes a standard ½” NPS process thread to be used with a machined thermowell or existing thermowell application.
  • Optional NEMA/IP-rated weatherproof enclosures and NIST Calibration Certificates are available when ordering the A/TTM Series transmitters.
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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 Immersion Series features a two-wire, 4 to 20 mA loop-powered output signal with an optional three-wire voltage output signal available. All transmitters include Zero and Span adjustments for field calibration and are calibrated using NIST Certified Calibration equipment. We recommend the use of an 18 to 22 AWG shielded cable for all temperature transmitter installations to keep noise from being introduced onto the signal lines. The sensor assemblies are manufactured using Etched Teflon colored lead wires and ACI’s proven double encapsulation process to eliminate the effects of moisture on the sensors as well as increased response times from our high-quality, thermally conductive epoxy. The immersion sensors “-I” include a welded thermowell but can be ordered without the thermowell “-INW” version. The “-INW” includes a standard ½” NPS process thread to be used with a machined thermowell or existing thermowell application. Optional NEMA/IP-rated weatherproof enclosures and NIST Calibration Certificates are available when ordering the A/TTM Series transmitters as referenced in the ordering grid on the back of the product datasheet. For best accuracy, ACI recommends the use of the A/TTM Series Matched transmitters which includes a 3 or 5 Point NIST Calibration Certificate, since they include a second calibration step in which the RTD and transmitter are calibrated together as a system.

Applications

  • Chilled Water Systems
  • Hot Water Systems
  • Boilers
  • Pumps
  • Compressors
  • Chillers
  • Cooling Towers
  • Process Control

The ACI Transmitters Immersion 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 Transmitter Accuracy | Linearity1 Temp. Spans < 500°F (260°C): +/- 0.2% | Temp. Spans > 500°F (260°C): +/- 0.5%
Temperature Drift2 Temp. Spans < 100°F (38°C): +/- 0.04% | Temp. Spans > 100°F (38°C): +/- 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%
Operating | Storage Temperature -40 to 185°F (-40 to 85°C)
Operating Humidity Range 0 to 90%, non-condensing
Calibrated Temperature Spans1 Minimum Temp. Span: 50°F (28°C) | Maximum Temp. Span: 500F (260°C)
Matched Calibrated Temperature Spans (A/TTM models) Range -45 to 155°C (-49 to 311°F)
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 Class | Accuracy +/- 0.06% Class A | (Tolerance Formula: +/- °C = (0.15°C + (0.002 * |t|))
where |t| is the absolute value of temperature above or below 0°C
Din Standard | Temperature Coefficient DIN EN 60751 (IEC 751) | 3850 ppm/°C
Sensor Stability +/- 0.03% after 1000 Hours @ 300°C (572°F)
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 121°C (-40 to 250°F), NEMA 1 (IP10)
“-PB” Enclosure: ABS Plastic, -30 to 90°C (-22 to 194°F), UL94-HB, Plenum Rated
“-BB” Enclosure: Aluminum, -40 to 121°C (-40 to 250°F), NEMA 3R
“-4X” Enclosure: Polystyrene Plastic, -40 to 70°C (-40 to 158°F), UL94-V2, NEMA 4X (IP 66)
Storage Temperature Range -40 to 85°C (-40 to 185°F)
Operating Humidity Range 10 to 90% RH, non-condensing
Probe Diameter | Thermowell Bore Diameter 0.250″ (6.35 mm) | 0.260″ (6.60mm)

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