DMT143

DMT143 VAISALA | Alldatasheet

Document overview

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Technical content

Features

• Vaisala DRYCAP â technology with a unique autocalibration function
• Calibration interval of 2 years
• Dew point measurement range
• Accuracy ±2 °C (±3.6 °F)
• Withstands condensation
• Compatible with Vaisala Indigo80 handheld indicator and Insight PC software
• Traceable calibration
• Voltage (V) or current (mA) analog output
• RS-485 digital output with Modbusâ RTU support
• LED alarm for exceeded dew point level
• Fast response time Due to its wide measurement range and excellent long-term stability, Vaisala DRYCAPâ Dew Point Transmitter DMT143 is an ideal choice for small compressed air dryers, plastic dryers, and other OEM applications. Vaisala DRYCAPâ technology Vaisala DRYCAPâ Dew Point Transmitter DMT143 is a miniature dew point measurement instrument. The transmitter can be installed directly into pressurized systems at 50 bar (725 psia) maximum pressure. The long- term high performance is achieved with Vaisala DRYCAPâ technology. The sensor fully withstands getting wet, and therefore, the transmitter performs exceptionally well in applications that occasionally experience process water spikes, such as pipeline condensation during a system failure or start-up. The sensor is also highly resistant to particulate contamination, oil vapor, and most chemicals, and is insensitive to the flow rate. Long calibration interval The calibration interval of DMT143 is 2 years. For any adjustment needs, the transmitter can be sent to a Vaisala Service Center. The unique autocalibration function, developed by Vaisala, detects possible measurement inaccuracies and automatically corrects dry-end drift in the calibration curve. This ensures accurate measurements and long calibration intervals. Easy installation DMT143 has a variety of features to choose from, including different output and installation options, and alarm LED. Due to its small size and light weight, DMT143 is quickly and easily installed in tight spaces or in small-size pipelines. The alarm LED indicates too high dew point in the process. The trigger point is preset at the factory. It can be later adjusted with the convenient Vaisala Insight PC software for Windowsâ. Insight PC software and the Indigo80 handheld indicator can also be used for other configuration options, as well as for viewing and logging measurement data (for more information, see www.vaisala.com/insight and www.vaisala.com/indigo).

Sensor DRYCAPâ 180D Sensor protection Stainless steel sintered filter Recommended calibration interval to confirm the specified accuracy 2 years Dew point temperature Measurement range (typical) −70 … +60 °C (−94 … +140 °F) Td Accuracy in air or N2 1) ±2 °C (±3.6 °F) Td (see graph below) 0 20 -10 -20 -30 10 30 40 50 60 Dew point temperature (°C) Temperature of measured gas (°C) -40 -30 -20 -10 -40 -50 -60 -70 -80 -90 Accuracy ±3 °C Td* Not recommended for continuous measurement Accuracy ±2 °C TdWater vapor saturation line * > 12 bar, accuracy ±4 °C Td Analog output scalings: Option 1 −80 … +20 °C (−112 … +68 °F) Td Option 2 −80 … +20 °C (−112 … +68 °F) Td dew point at ambient pressure Option 3 Free scaling Response time 63 % [90 %]: 2) −70 → −20 °C Td (−94 → −4 °F Td) 5 s [15 s] (typical) −20 → −70 °C Td (−4 → −94 °F Td) 45 s [10 min] (typical) Water concentration by volume (ppm) Measurement range (typical) 10 … 40 000 ppm Accuracy at +20 °C (+68 °F), 1 bar 1 ppm + 20 % of reading 1) When the dew point is below 0 °C (32 °F), the transmitter outputs frost point. 2) At +20 °C gas temperature and 1 bar pressure and 1 liter/min flow rate. Operating environment Measurement environment For air, nitrogen, hydrogen, argon, helium, and oxygen 1) Temperature 3) −40 … +60 °C (−40 … +140 °F) Relative humidity 0 … 100 % RH Pressure 3) 0 … 50 bara (725 psia) Sample flow rate No effect for measurement accuracy Storage temperature −40 … +60 °C (−40 … +140 °F) IP rating IP66 1) Consult Vaisala if other chemicals are present. Consider safety regulations with flammable gases. 2) The transmitter not tested for leakages, which may occur esp. with small-molecule gases such as hydrogen and helium. 3) For extended temperature below 0 °C (+32 °F) or pressure above 20 bar a (290 psia) the supply voltage must be 24 … 28 VDC. Inputs and outputs Analog output (scalable) 4 … 20 mA (3-wire), 0 … 1 V / 5 V, 1 … 5 V Resolution for current output 0.002 mA Resolution for voltage output 0.3 mV Accuracy for current output at +20 °C ±0.05 mA Accuracy for voltage output at +20 °C ±0.01 V Operating voltage with digital output 12 … 28 VDC Operating voltage with voltage output 12 … 28 VDC Operating voltage with current output 18 … 28 VDC Load for current output Max. 500 Ω Load for voltage output Min. 10 kΩ Typical temperature dependence 0.005 % of span/°C Digital output RS-485, non-isolated Supported protocols Vaisala industrial protocol Modbus RTU Connector 4-pin M8 (IEC 60947-5-2) Supply current at +20 °C (Uin 24 VDC) Normal measurement 10 mA + load current (typical) During self-diagnostics 220 mA pulsed (typical) Mechanical specifications Mechanical connection ISO 228-1 G1/2" 1/2" NPT 3/4"-16 UNF 5/8"-18 UNF Housing material Stainless steel (AISI316L) Weight: G thread and UNF thread versions 90 g (3.2 oz) NPT thread version 100 g (3.5 oz) Compliance EU directives and regulations EMC Directive (2014/30/EU) RoHS Directive (2011/65/EU) amended by 2015/863 EMC compatibility IEC/EN 61326‑ 1, industrial environment CISPR 32 / EN 55032, Class B Compliance marks CE, China RoHS, RCM, UKCA Spare parts and accessories USB cable for PC connection 1) 219690 DM70 connection cable, M12-M8 219980SP Loop powered external display 226476 Loop powered external display with relays 234759 Sampling cells Basic sampling cell DMT242SC With Swagelok 1/4" male connectors DMT242SC2 With quick connector and leak screw DSC74SP Two-pressure sampling cell DSC74BSP Cooling/venting coil DMCOILSP See the DSS70A product page at www.vaisala.com for further information about the sampling cells available for DM70. 1) Vaisala Insight software for Windows is available at www.vaisala.com/insight.

ISO 228-1 G1/2" Ø28 [1.10] Ø12 91.6 [3.61] [0.47] mm [in] 20 [0.79] DMT143 with ISO 228-1 G1/2" thread AW30 1/2" NPT Ø12 91.6 [3.61] [0.47] mm [in] Ø28 [1.10] 20 [0.79] DMT143 with 1/2" NPT thread AW24 3/4"-16 UNF Ø28 [1.10] Ø12 91.6 [3.61] [0.47] mm [in] 20 [0.79] DMT143 with 3/4"-16 UNF thread AW24 5/8"-18 UNF Ø28 [1.10] Ø12 91.6 [3.61] [0.47] 20 [0.79] mm [in] DMT143 with 5/8"-18 UNF thread Published by Vaisala | B211207EN-K © Vaisala 2023 All rights reserved. Any logos and/or product names are trademarks of Vaisala or its individual partners. Any reproduction, transfer, distribution or storage of information contained in this document is strictly prohibited. All specifications — technical included — are subject to change without notice. www.vaisala.com