TX253温度变送器 美国omega
热电偶和RTD变送器 TX250 Series 热电偶和RTD变送器 热电偶和RTD模型available 可调跨度 非离体4 20mA输出 微型尺寸 适合在NBI保护头 高精度 高RFI immunity DIP开关多收 低成本 安装孔和带我们centerline螺钉内# 8。
TX250 Series Thermocouple Input The TX250 Series are non-isolated two-wire transmitter which convert the T/C thermoelectric voltage into a standardized load-independent, 4 to 20 mA process current. The TX250 Series are housed in metal enclosures and fit into NB1 connection heads. The transmitter’s enclosure provides excellent RFI immunity. The transmitter calibration is set by six dip-switches located behind the top cover. There are three basic models which cover the various T/C types. TX251 is for T/C types K, T and J; TX252 is for type E and TX253 is for type R and S. Dip-switch arrays select the T/C type, and set the "Zero" coarse level and the "Span" coarse range. Zero and Span trimmers provide the fine tuning calibration. TX254 RTD Input The TX254 is a non-isolated two-wire transmitter which converts the measuring signal of a 3 wire 100 ohm Pt RTD into a standardized load-independent, 4 to 20 mA current which is linearly proportional to the measured temperature. The TX254 transmitter is provided with excellent lead resistance compensation and Pt-100 linearization conforming to BS1904 and DIN 43760 characteristics (a = 0.00385). The transmitter calibration is set by six dip-switches located behind the top cover. Three dip-switches set the lower measured coarse temperature and the other three dip-switches set the measured coarse temperature span. Zero and Span trimmers provide the fine tuning calibration. General Specifications Output Current: 4 to 20 mA, 28 mA limited Supply Voltage: 10 to 36 Vdc (24 Vdc recommended) Supply Variation Effect: <0.001%/1V change Accuracy: Better than 0.1% of span Load Resistance: Rmax () = (Vsupply - 10)/.02 Temperature Stability: <0.01% of span/1°C Operating Temperature: -20 to 70°C (-4 to 158°F) Humidity: 5 to 95% RH, non condensed Housing: Die-cast zinc alloy Mounting Holes: 5 mm ID suitable for 8-32 screw Dimensions: 44 Dia x 33 mm H (1.7 x 1.3") including the terminal block. Weight: 50 g (1.5 oz) TX250 Thermocouple Input Specifications Input: TX251: thermocouple type K, T, J TX252: thermocouple type E TX253: thermocouple type R, S Calibration: Two "Zero" DIP switches, three "Span" DIP switches and two fine-tuning trimmers Cold Junction Error: ±0.9°C (1.6°F) typical (3°C [5.4°F] for R and S) for 0 to 60°C (32 to 140°F) Linearity (refer to mV input): <0.08% of span Note: Transmitters are linear to the mV input from the thermocouple, not to temperature. TX250 RTD Input Specifications Input: 3-wire Pt-100 according to BS 1904 and DIN 43760 characteristics Input Span Range: 30 to 800°C Input Zero Range: -50 to 200°C Calibration: Three "Zero" DIP switches, three "Span" DIP switches and two fine-tuning trimmers Sensor Lead Resistance: 50 maximum (two ways) Lead Compensation Error: <0.05°C/10 lead resistance Sensor Excitation: <1 mA Linearity: Better than 0.08% of span
Transmitter Scaling Recommended (TX-SCALED) unless you have a source to scale the transmitter! 注释: All transmitters require scaling. If TX-SCALED is not ordered, then scaling must be done in the field. Item required to scale include: means of simulation of the 0% and 100% input values, means to power and read the 4-20mA loop signal, understanding/ability to adjust dip switches and zero & span potentiometers.
产品型号/产品描述 Transmitters (Factory Scaling Recommended) TX251 Transmitter for J, K, T type thermocouples, Scaling Recommended see TX-SCALED Below TX252 Transmitter for E type thermocouples, Scaling Recommended see TX-SCALED Below TX253 Transmitter for R, S type thermocouples, Scaling Recommended see TX-SCALED Below TX254 Transmitter for 3-wire 100 ohm platinum RTDs, Scaling Recommended see TX-SCALED Below Transmitter Scaling TX-SCALED Transmitter Scaled as requested within input range. After order placment you will be contacted for desired range PSR-24S Regulated power supply, 24 Vdc, 400 mA, screw terminal PSR-24L Regulated power supply, 24 Vdc, 400 mA, UL, stripped leads PSR-24L-230 Regulated power supply, 24 Vdc, 400 mA, stripped leads, 230 Vac input, CE PSU-93 40 Unregulated power supply, 16 to 23 Vdc, 300 mA max, screw terminal
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