GESTRA液位变送器NRGT26-2S技术参数
Technical data | |
Model and mechanical connection | NRGT 26-2s: Flange DN 50, PN 40, DIN 1092-01 |
Nominal pressure rating, admissible service pressure and temperature | NRGT 26-2s: PN 40, 32 bar (g) at 238 °C |
Materials | |
Terminal box: | 3.2581 G AlSi12, powder-coated |
Sheath: | 1.4301 X5 CrNi 18-10 |
Electrode rod insulation: | PTFE |
Screw-in body: | 1.4571, X6CrNiMoTi17-12-2 |
NRGT 26-2s: | Flange 1.0460 P250GH |
Supply voltage | 24 V DC +/-20 % |
Power consumption | Max. 7 VA |
Current input | Max. 0.3 A |
Internal fuse | T2A |
Safety cutout at excessive ambient temperature | The cutout takes place at an excessive ambient temperature of Tamb. = 75 °C Analogue output |
Indicators and controls | 1 green 4-digit, 7-segment display for showing status information |
Protection class | III Safety Extra Low Voltage (SELV) |
IP rating to EN 60529 | IP 65 |
Admissible ambient conditions | Service temperature: 0 °C - 70 °C |
Weight (dependent on length of electrode) | NRGT 26-2s approx. 5.9 kg (with 275 mm measuring range) |
GESTRA液位变送器NRGT26-2S产品介绍
用途
作为水位控制器使用
NRGT 26-2 和 NRGT 26-2s 液位变送器可用于持续测量加压蒸汽和热水装置中的水位,或冷凝水与给水罐中的水位。经校准的测量范围从 0% 到 100% 构成 4–20 mA 电流输出的线性特性。
变送器的安全 4–20 mA 实际值输出(SIL 2)可与合适的液位控制器配合使用,例如作为带有最小/最大报警的水位控制器。
变送器安装在加压蒸汽装置、罐或加压热水装置的给水管道内部。现场提供的保护管可确保可靠运行。
电容式 NRGT 26-2 或 NRGT 26-2s 液位变送器与导电式 NRG 1x-60 或 NRG 1x-61 液位电极可安装在同一保护管或液位井中。
被测流体的影响
NRGT 26-2 和 NRGT 26-2s 液位变送器可用于具有不同电导率的流体。然而,当电导率低于 100 μS/cm 时,会对测得的电容值产生较大影响,因此在工作点和冷启动后对测量范围进行重新校准极为重要。
为获得尽可能好的重现性并保持高质量测量(参见“技术数据”),传感器必须安装在保护管内。
功能
变送器功能
变送器功能是指电极能够在 4–20 mA 电流输出接口上提供可缩放的测量范围,并将该测量值提供给一个或多个接收方以供分析。
电导型变送器不具有任何控制或限制功能。
正常运行(无故障)时的行为
显示屏显示缩放后的液位读数(3 位整数 + 1 位小数),例如 050.3,并将液位数据转换为与液位相关的 4–20 mA 电流信号。
发生故障时的行为
错误状态或故障会在显示屏上用故障代码(例如 E.005)永久显示。
每当发生故障时,电流输出为 0 mA。
设置参数和更改出厂设置
可使用端子盒上的旋钮设置参数并更改出厂设置。
显示与信号
NRGT 26-2 和 NRGT 26-2s 液位变送器配备绿色的 4 位 7 段显示,用于显示读数、状态信息和故障代码。红色和绿色 LED 指示运行状态。
Description
Use as a water level controller
NRGT 26-2 and NRGT 26-2s level transmitters can be used to continually measure the water level in pressurised steam and hot-water plants, or in condensate and feedwater tanks. The calibrated measuring range from 0 % to 100 % constitutes the linear profile of the 4-20 mA current output.
The transmitter’s secure 4-20 mA actual value output (SIL 2) can be used with a suitable level controller, as a water level controller with MIN/MAX alarm, for example.
The level transmitters are installed on the inside of pressurised steam plants, tanks or feed lines of pressurised hot-water plants. A protective tube provided on site ensures reliable function.
A capacitive NRGT 26-2 or NRGT 26-2s level transmitter and a conductive NRG 1x-60 or NRG 1x-61 level electrode can be installed in the same protective tube or level pot.
Influence of the fluid to be monitored
NRGT 26-2 and NRGT 26-2s level transmitters can be used in fluids with different conductivity. However, a conductivity of less than 100 μS/cm has a major influence on the measured capacitance, which is why recalibration of the measuring range at the operating point and after a cold start is extremely important.
To achieve the best possible reproducibility and maintain high-quality measurements (see “Technical data”), the sensor must be installed in a protective tube.
Function
Transmitter function
The transmitter function is the ability of the electrode to provide a scalable measuring range on the 4-20 mA current output interface and to make this available to one or more recipients for analysis.
Conductivity transmitters do not have any controlling or limiting functions.
Behaviour in normal operation (no faults)
The display shows the scaled level reading (3 digits + 1 decimal place), e.g. 050.3, and converts the level data into a level-dependent current signal from 4-20 mA.
Behaviour in the event of malfunctions
The error state or malfunction is permanently shown on the display by a fault code, e.g. E.005.
Every time there is a fault, 0 mA is output via the current output.
Setting parameters and changing factory settings
You can set parameters and change factory settings using a rotary knob on the terminal box.
Display and signals
NRGT 26-2 and NRGT 26-2s level transmitters feature a green 4-digit, 7-segment display for showing readings, status information and fault codes. A red and green LED indicate the operating status.
GESTRA液位变送器NRGT系列其他常用型号:
GESTRA NRGT 26-1
GESTRA NRGT 26-1S
GESTRA NRGT 26-2
GESTRA NRGT 26-2S
GESTRA Level Transmitter NEW + ORIGINAL+ ONE YEAR WARRANTY
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如果有任何关于GESTRA液位变送器NRGT26-2S的疑问,请随时与我们沟通(021-31006702)。我们将尽全力解决您的问题。
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GESTRA液位变送器NRGT26-2S技术参数及介绍










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