超声波液位测量仪 LUC-M**
来源：未知 日期：2017/08/09 浏览量：次
液位测量技术是化学、化工、环境和相关行业中过程控制管理的基本技术。
液位传感器可以检测到当前浸入的高度。它通过介质表面与预设参考高度的差值来测量实现。连续液位测量带有使用率评估，漏液控制及精确流程控制(VDI/VDE Directive 3519)的功能。
物位高度通过计算超声波脉冲从传感器到介质表面和返回的时间而得出的。介质的化学和物理特性不会影响测量结果。因此，毫无疑问腐蚀性和粗糙的，黏滞的和黏性的介质可以被测量。
连续量物位测量是通过计算超声波脉冲发射到介质表面并返回的经过时间而得出的。 当安装传感器时，必须考虑避开固定的障碍物。不平的液体表面和颗粒状固体的填充剂排空角度均会影响超声波脉冲的反射并对测量效果造成不良影响。
产品特点：● Quick and simple commissioning via menu-guided onsite operation with four-line display
● Envelope curves on the on-site display for simple diagnosis
● Linearization function (up to 32 points) for conversion of the measured value into any unit of length, volume or flow rate
● Non-contact measurement method minimizes service requirements
● Optional remote display and operation (up to 20 m from transmitter)
● Integrated temperature sensor for automatic correction of the temperature dependent sound velocity
| 功能与系统元件： | ||
|---|---|---|
| Measuring principle | The sensor of the device transmits ultrasonic pulses in the direction of the product surface. There, the ultrasonic pulses are reflected back and received by the sensor. The device measures the time between pulse transmission and reception. The instrument uses the time (and the velocity of sound) to calculate the distance between the sensor membrane and the product surface. As the device knows the empty distance from a user entry, the device calculate the level. | |
| Equipment architecture |
4 ... 20 mA output with HART protocol system integration via PROFIBUS PA |
|
| 输入特性： | ||
| Measured variable |
distance between the sensor membrane and the product surface using the linearization function, the device calculate - level in any units - volume in any units - flow across measuring weirs or open channels in any units |
|
| Measurement range |
LUC-M10: max. 5 m (16.4 ft) in fluids and 2 m (6.6 ft) in bulk materials LUC-M20: max. 8 m (26.2 ft) in fluids and 3,5 m (11.5 ft) in bulk materials LUC-M30: max. 15 m (49.2 ft) in fluids and 7 m (23 ft) in bulk materials LUC-M40: max. 10 m (32.8 ft) in fluids and 5 m (16.4 ft) in bulk materials |
|
| 输出特性： | ||
| Output signal |
according to the instrument version: - 4 ... 20 mA with HART protocol - PROFIBUS PA |
|
| 辅助功能： | ||
| Electrical connection |
terminal compartment: In the F12 housing, the terminals are located underneath the housing cover, in the T12 housing, they are under the cover of the separate terminal compartment. cable gland: M20x1.5 (recommended cable diameter 6 ... 10 mm (0.24 ... 0.4 inch)) cable entry G1/2 or NPT1/2 PROFIBUS PA: M12 plug connector |
|
| Supply voltage |
2-wire HART (standard): - current consumption 4 ... 20 mA - min. terminal voltage 14 V (at 4 mA), 8 V (at 20 mA) - max. terminal voltage 36 V 4-wire HART: - DC version: voltage 10.5 ... 32 V, max. load 600 Ω - AC version: 90 ... 253 V, max. load 600 Ω PROFIBUS PA: 9 ... 32 V DC for additional information see technical information |
|
| Power consumption |
2-wire: 51 ... 800 mW 4-wire AC: max. 4 VA 4-wire DC: 0.6 ... 1 W |
|
| Current consumption |
2-wire devices: - HART: 3.6 ... 22 mA - PROFIBUS PA: max. 13 mA |
|
| 测量精度： | ||
| Reaction time |
depends on the parameter settings: - min. 0.5 s for 4-wire devices - min. 2 s for 2-wire devices |
|
| Reference operating conditions |
temperature = 20 °C (68 °F) pressure = 1013 mbarabs humidity = 50 % ideal reflective surface (e. g. calm, smooth fluid surface) no interference reflections within signal beam set application parameters: - tank shape = flat ceiling - medium property = liquid - process conditions = calm surface |
|
| Measured value resolution |
LUC-M10, LUC-M20: 1 mm (0.04 inch) LUC-M30, LUC-M40: 2 mm (0.08 inch) |
|
| Measuring frequency |
2-wire devices: max. 0.5 Hz 4-wire devices: max. 2 Hz dependent on the type of device and the parameter settings |
|
| Maximum measured error |
typical specifications for reference operating conditions (include linearity, repeatability, and hysteresis): ± 2 mm (0.08 inch) or 0.2% of set measuring range (empty calibration)1) 1) whichever is greater |
|
| 操作条件： | ||
| Installation conditions | see technical information (TI) | |
| Ambient conditions | ||
| Ambient temperature | -40 ... 80 °C (-40 ... 176 °F) , For further information see technical information. | |
| Storage temperature | -40 ... 80 °C (-40 ... 176 °F) | |
| Resistance to alternating temperature cycles | Nb test: +80 °C/- 40 °C (353 K/233 K), 1 K/min, 100 cycles | |
| Vibration resistance | 20 ... 2000 Hz, 1 (m/s2)2/Hz; 3 x 100 min | |
| Process conditions | ||
| Process temperature | -40 ... 80 °C (-40 ... 176 °F) (233 ... 353 K), a temperature sensor is integrated in the sensor for correction of the temperature-dependent time-of-flight | |
| Process pressure (static pressure) |
LUC-M10, LUC-M20: 0.7 ... 3 barabs LUC-M30, LUC-M40: 0.7 ... 2.5 barabs |
|
| 机械特性： | ||
| Degree of protection |
with closed housing, tested according to - IP68, NEMA 6P (24 h at 1.83 m under water surface) - IP66, NEMA 4X with open housing: IP20, NEMA 1 (also ingress protection of the display) |
|
| 机械结构： | ||
| Dimensions | see section dimensions | |
| Mass |
LUC-M10: approx. 2.5 kg LUC-M20: approx. 2.6 kg LUC-M30: approx. 3.5 kg LUC-M40: approx. 3 kg |
|
| Material |
material in contact with process: - LUC-M10, LUC-M20: sensor PVDF, seal EPDM - LUC-M30: sensor UP and stainless steel 1.4571/316Ti, seal EPDM, flange PP or stainless steel 1.4571/316Ti - LUC-M40: sensor PVDF, seal Viton or EPDM, flange PP, PVDF or stainless steel 1.4535/316L housing: aluminum, seawater resistant, chromated, powder-coated cover: - aluminum, for version without on-site display - inspection glass for version with on-site display |
|
| 许可和认证： | ||
| Explosion-hazardous area | KEMA 05 ATEX 1111, KEMA 05 ATEX 1112 , for additional certificates see www.pepperl-fuchs.com | |
| Type of protection |
 II 1/2G or II 2G EEx ia IIC T6 (KEMA 05 ATEX 1111) II 1/2G or II 2G EEx d [ia] IIC T6 (KEMA 05 ATEX 1111) II 1/2G or II 2G EEx em [ia] IIC T6 (KEMA 05 ATEX 1111) II 1/2D or II 2D or II 1/3D or II 3D T115°C or T100°C or T95°C (KEMA 05 ATEX 1111) II 1/2D or II 2D or II 1/3D or II 3D T115°C or T83°C or T84°C or T86°C (KEMA 05 ATEX 1112) II 3G EEx nA II T6 |
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