DMT340

DMT340 VAISALA | Alldatasheet

Document overview

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Technical content

Features

• Measures dew point from an accuracy of ±2 °C (±3.6 °F)
• Condensation-resistant
• Unique auto-calibration feature maintains accuracy over long term
• Compatible with Vaisala DRYCAPâ Handheld Dew Point Meter DM70
• Traceable calibration to measurements and analog outputs (certificates included)
• Graphical display and keypad for convenient operation
• Optional alarm relays and mains power supply module
• Up to three analog outputs, RS-232/485
• Modbus RTU protocol support Vaisala DRYCAPâ Dew Point and Temperature Transmitter Series DMT340 is designed for industrial low-humidity applications such as industrial drying, compressed air systems, semiconductor industry, dry rooms, baking ovens, and metal heat treatment. Vaisala DRYCAPâ sensor benefits
• Accurate and reliable measurement
• Excellent long-term stability
• Fast response time
• Resistant to environmental factors and condensation Stability at low dew points The Vaisala DRYCAPâ sensor is immune to particulate contamination, water condensation, oil vapor, and most chemicals. The sensor is condensation resistant and recovers perfectly if exposed to liquid water. Fast reaction time and stability make its performance unmatched also in dynamic and low dew point applications. Graphical display of measurement data and trends for convenient operation The DMT340 features a large numerical and graphical display with a multilingual menu and keypad. It allows users to easily monitor operational data, measurement trends, and access measurement history for the past 12 months. The display shows measurement trends, real-time data, and measurement history. Versatile outputs and data collection The DMT340 can support up to three isolated analog outputs. Optional AC mains power and relay outputs are also available. In addition to the analog outputs, DMT340 supports the Modbus RTU communication protocol.

The data logger, with real-time clock and battery backup, guarantees reliable logging of measurement data for over 4 years. The display alarm allows tracking of any measured parameter, with freely configurable low and high limits. The recorded data can be viewed on the local display or transferred to a PC with Microsoft Windowsâ software. A USB service cable makes it easy to connect the DMT340 to a PC via the service port for modifying settings or reading logged data. Easy installation With multiple options to choose from, the instrument can be tailored to meet the specific needs of each individual application and is delivered installation- ready and pre-configured for each delivery. Quick delivery time and global service network make DMT340 a perfect choice for any project. The Vaisala DRYCAPâ Handheld Dew Point Meter DM70 is ideal for field checking DMT340 transmitters. DMT342 DMT344 DMT347 DMT348 Mechanical durability Up to 250 bar/ 3625 psia Up to 100 bar/1450 psia Up to 10 bar/145 psia Up to 70 bar/1015 psia Probe diameter 12 mm/0.5 in 12 mm/0.5 in 12 mm/0.5 in 12 mm/0.5 in Installation Flange 36 mm/1.4 in Fitting body M22 x 1.5 Fitting body NPT 1/2 in Fitting body R 3/8 in ISO Fitting body G 1/2 in ISO Fitting body NPT 1/2 in Fitting body R1/2 in ISO Fitting body NPT 1/2 in Ball-valve set BALLVALVE-1 Sampling cell HMP302SC DMT242SC or DMT242SC2

DMT340 Series Dew Point and Temperature Transmitters for very dry conditions DMT341 for installations in dry spaces DMT341 display shows measurement trends, real-time data, and measurement history. DMT341 is made for installations in dry rooms where the entire dew point transmitter needs to be inside the dry space. The concept is easy to clean and suitable also for cleanrooms. 244.5 (9.63) 119 (4.69) DMT341 dimensions in mm (inches) DMT342 with small size flanged probe The DMT342 probe is installed using a flange or sampling cell. The small probe is ideal for integration into larger equipment or applications with high pressures. Flange intersection Sampling cell HMP302SC ø36 (1.42) ø32 (1.26) 41 (1.61) ø12 (0.47) 1/8"-27 NPT 9 (0.35) 92.5 (3.64) 81 (3.19) 71 (2.80) 58.7 (2.31) 16 (0.63) ø24.5 45° 45° 45° ø12.5 (0.49) 1/8"-27 NPT DMT342 dimensions in mm (inches)

DMT344 with probe for high pressures The DMT344 features a threaded connection for extended pressures with different fitting-body options. It is ideal for permanent installation into pressurized or vacuum processes. NPT 1/2" 170 120 Ø12 M22 x1.5 / (6.69) (4.72) (1.61) (0.47) DMT344 dimensions in mm (inches) DMT347 with small-sized probe The DMT347 probe is ideal for pressurized or vacuum applications in tight spaces. The small probe is installed using Swagelokâ connectors. 84 (3.31) (1.61) )74.0( 21 Ø Hex 22 mm (0.87) ISO 3/8" / NPT 1/2" / G 1/2" DMT347 dimensions in mm (inches) DMT348 with probe for pipeline installations The DMT348 is ideal for installation into pressurized or vacuum processes where the probe needs to be able to be removed while the process is running. The probe depth is adjustable. / 448 (17.6) / 410 (16.1) 191 (7.52) 215.5 (8.48) 41 (1.61) 12 (0.47) 13.5 (0.53) R1/2” ISO7 /1 35 (1.37) ØØ Optional filter for low pressures, suitable for all models, dimensions in mm (inches). Optional filter provides faster gas exchange to the sensor in applications where protection from particulates is not needed.

DMT340 Series technical data Measurement performance Dew point Sensor Vaisala DRYCAPâ 180M Accuracy up to 20 bar/290 psia ±2 °C/±3.6 °F (see the accuracy graph below) Dewpoint temperature (°C) Temperature of measured gas (°C) -60 -90 -10 -20 -30 -50 -40 -70 0-10-20-30-40 10 20 30 40 50 60 70 80 Water vapor saturation line Dewpoint measurement lower limit Accuracy ±2 °C Td Accuracy ±3 °C Td Not recommended area for continuous measurement -80 Dew point Accuracy not specified Dew point Dew point accuracy vs. measurement conditions Response time 63% [90%] at +20 °C gas temperature T63 [T90] response times at 20 °C and 1 l/min flow: Temperature Accuracy ±0.2 °C at room temperature Temperature sensor Pt100 RTD Class F0.1 IEC 60751 Relative humidity Measurement range 0 ... 70 %RH Accuracy (RH <10 %RH, at + 20 °C) ±0.004 %RH + 20% of reading Concentration by volume (ppm) Measurement range (typical) 10 ... 2500 ppm Accuracy (at + 20 °C, 1 bar) 1 ppm + 20% of reading Other measurement parameters available (model-dependent): mixing ratio, absolute humidity, pressure dew point calculated to 1 bar, temperature difference (T-Td), water vapor pressure Operating environment Mechanical durability Up to +180 °C (+356 °F) Mechanical durability of transmitter body Pressure range for probes See probe specifications Sample flow rate No effect Measured gases For air, nitrogen, hydrogen, argon, helium, and oxygen 1)1) 1) Consult Vaisala if other chemicals are present. Consider safety regulations if other chemicals are present. Compliance Compliance marks CE, RCM Electromagnetic compatibility Complies with EMC standard EN61326-1, Industrial environment Note: For transmitter with display, a test impedance of 40 Ω is used in IEC61000-4-5 (Surge immunity). Inputs and outputs Operating voltage 10 ... 35 V DC, 24 V AC ±20 % with optional power supply module 100 ... 240 V AC 50/60 Hz Power consumption at 20 °C (Uin24VDC) RS-232 Max. 25 mA Iout 2 x 0 ... 20 mA Max. 60 mA Display and backlight + 20 mA During sensor purge Max. + 110 mA Analog outputs (2 standard, 3rd optional) Accuracy of analog outputs at 20 °C 0.05 % full scale Temperature dependence of the analog outputs ± 0.005 %/°C full scale External loads Current outputs RL < 500 Ω 0 ... 1 V output RL > 2 kΩ Stranded wires recommended Digital outputs RS-232, RS-485 (optional) Protocols ASCII commands, Modbus RTU Service connection RS-232, USB Relay outputs 0.5 A, 250 V AC, SPDT (optional) Optional data logger with real-time clock Logged parameters Max. three with trend/min./max. values Logging interval 10 sec (fixed) Max. logging period with max. temporal resolution 4 years, 5 months Logged points 13.7 million points per parameter Battery lifetime Min. 5 years Display LCD with backlight, graphical trend display of any parameter Menu languages English, Chinese, Finnish, French, German, Japanese, Russian, Spanish, Swedish

169 (6.65) 183 (7.20) 71 (2.80) 77 (3.03) Ø 7 (0.28) 96 (3.78) 116 (4.57) Dimensions in mm (inches) Mechanical specifications Cable bushing M20x1.5 for cable diameter 8 ... 11 mm/ Conduit fitting 1/2" NPT User cable connector (optional) M12 series 8-pin (male) Option 1 Female plug with 5 m (16.4 ft) black cable Option 2 Female plug with screw terminals USB-RJ45 Serial Connection Cable 219685 Probe cable diameter 5.5 mm (0.22 in) Standard probe cable lengths 2 m, 5 m, or 10 m (6.6 ft, 16 ft, or 33 ft) (Additional cable lengths available, see order forms for details) Housing material G-AlSi 10 Mg (DIN 1725) Housing classification IP66 IP65 with local display Weight (depending on selected probe, cable, and modules) Published by Vaisala | B210952EN-K © Vaisala Oyj 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