深圳市鑫博恒业科技有限公司
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TX252
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
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
| Model No. | Input Type | Span Range* | Minimum Span | Zero Offset Range |
| TX251 | J | -100 to 750°C | 85°C | -100 to 50°C |
| -148 to 1380°F | 155°F | |||
| K | -100 to 1350°C | 105°C | -100 to 100°C | |
| -148 to 2440°F | 190°F | |||
| T | -100 to 400°C | 100°C | -100 to 100°C | |
| -148 to 750°F | 180°F | |||
| TX252 | E | -100 to 1000°C | 75°C | -100 to 30°C |
| -148 to 1832°F | 135°F | |||
| TX253 | R | 0 to 1750°C | 600°C | 0 to 750°C |
| 32 to 3180°F | 1080°F | |||
| S | 0 to 1750°C | 600°C | 0 to 750°C | |
| 32 to 3180°F | 1080°F | |||
| TX254 | RTD 100 ohm Pt |
-50 to 750°C | 30°C | -50 to 300°C |
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 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
TX252
美国Omega TX252
