GRAEFF magnetic pen instructions

前言

 INTRODUCTION

    在工业生产和各类压力测量场景中，压力变送器的精准度至关重要。而GRAEFF（格拉夫）磁性笔作为操作压力变送器的关键工具，其独特的功能和便捷的使用方式，能够帮助我们更好地完成压力变送器的调试与校准工作，确保测量数据的准确性和可靠性。接下来，让我们详细了解一下GRAEFF（格拉夫） 磁性笔的使用方法。      In industrial production and various pressure measurement scenarios, the accuracy of the pressure transmitter is crucial. The GRAEFF magnetic pen is a key tool for operating the pressure transmitter, and its unique function and convenient use can help us better complete the debugging and calibration work of the pressure transmitter, ensuring the accuracy and reliability of the measurement data. Next, let's take a closer look at the use of GRAEFF's magnetic pen.

压力变送器调零操作 

Pressure transmitter zero operation

（一）传统调零方法

 

Traditional zeroing methods

    在以往的压力变送器调零操作中，常见的方法包括通过表头上的按钮进行操作，如按住 “Z” 键几秒将当前压力设为零点；或者使用475 等设备进行清零；还可以通过手操器进入相应菜单改量程来实现调零等。然而，这些方法往往需要较为复杂的操作步骤，且可能受到设备兼容性、操作环境等因素的限制，不够便捷高效。

     In the previous pressure transmitter zero operation, the common method includes the operation through the button on the watch head, such as holding down the "Z" key for a few seconds to set the current pressure to zero; Or use 475 and other equipment for zero clearing; You can also use the hand operator to enter the corresponding menu to change the range to achieve zero adjustment. However, these methods often require more complex operation steps, and may be limited by device compatibility, operating environment and other factors, not convenient and efficient.

（二）GRAEFF（格拉夫） 磁性笔优势

 

GRAEFF magnetic pen advantage

GRAEFF（格拉夫）磁性笔的出现，为压力变送器的调零工作带来了极大的便利。与传统调零方式相比，它无需复杂的按键操作或借助其他专业设备，只需简单地靠在压力变送器外壳的清零标志处，即可快速、精准地完成调零任务。这种操作方式不仅大大节省了时间和人力成本，而且降低了对操作人员专业技能的要求，使得调零工作更加轻松、高效。

 

The appearance of the GRAEFF magnetic pen has brought great convenience to the zero adjustment work of the pressure transmitter. Compared with the traditional zeroing method, it does not need complex key operation or other professional equipment, simply rely on the pressure transmitter housing at the zero sign, you can quickly and accurately complete the zero task. This mode of operation not only greatly saves time and labor costs, but also reduces the requirements for the professional skills of the operator, making the zero work easier and more efficient.

（三）调零详细步骤分解

         Zeroing detailed step breakdown

    前期准备要点：首先，确保压力变送器已经正确安装到管线上，并且电气连接按照接线图所示的连接方式完成。在进行调零操作前，需要将管线加热至合适温度，同时确保压力为零。这一步骤非常关键，因为只有在特定的温度和压力条件下，才能保证调零的准确性和可靠性。例如，在一些工业生产过程中，如化工、石油等行业，管线内的介质温度和压力可能会对压力变送器的测量产生较大影响，如果在调零前不将这些因素控制好，可能会导致调零后的测量数据出现偏差，从而影响整个生产过程的稳定性和安全性。

Preparation points: First, ensure that the pressure transmitter has been correctly installed on the pipeline and that the electrical connection is completed as shown in the wiring diagram. Before zeroing, the line needs to be heated to the right temperature and the pressure is zero. This step is critical because the accuracy and reliability of zeroing can only be guaranteed under certain temperature and pressure conditions. For example, in some industrial production processes, such as chemical, petroleum and other industries, the temperature and pressure of the medium in the pipeline may have a greater impact on the measurement of the pressure transmitter, if these factors are not controlled well before zero adjustment, it may lead to deviation of the measurement data after zero adjustment, thus affecting the stability and safety of the entire production process.

    磁性笔操作指南：当管线加热且压力归零后，取出GRAEFF（格拉夫）磁性笔，将其笔头准确地靠在压力变送器外壳的清零标志处，保持 3 - 5 秒。在此过程中，要确保磁性笔与清零标志紧密接触，避免因接触不良而影响调零效果。同时，操作人员应保持手部稳定，避免晃动或移动磁性笔。需要注意的是，不同型号的压力变送器，其清零标志的位置和形状可能会有所差异，因此在操作前，务必仔细查阅相关设备的说明书，找准清零标志的位置，以确保调零操作的顺利进行。例如，某些压力变送器的清零标志可能位于外壳的侧面，而有些则可能在顶部或底部，只有准确找到标志位置，才能使磁性笔发挥作用，实现精准调零。

Magnetic pen operation guide: When the pipeline is heated and the pressure has returned to zero, take out the GRAEFF magnetic pen, and accurately lean its tip against the zero mark of the pressure transmitter housing, and hold it for 3-5 seconds. In this process, it is necessary to ensure that the magnetic pen is in close contact with the zero clearing mark to avoid affecting the zero setting effect due to poor contact. At the same time, the operator should keep the hand stable and avoid shaking or moving the magnetic pen. It should be noted that the position and shape of the zero sign of different models of pressure transmitters may be different, so before operation, be sure to carefully consult the instructions of the relevant equipment to find the position of the zero sign to ensure the smooth operation of the zero. For example, the clear mark of some pressure transmitters may be located on the side of the housing, while some may be on the top or bottom, and only by accurately finding the mark position can the magnetic pen play a role in achieving accurate zero adjustment.

使用注意事项与维护保养 

Use precautionsand maintenance

（一）操作禁忌

 

Operation taboo

   在使用 GRAEFF（格拉夫）磁性笔时，应避免将其放置在强磁场环境中，如靠近大型电机、变压器等设备，以免影响磁性笔的磁性，进而干扰其对压力变送器的操作效果。同时，严禁使用磁性笔对压力变送器进行敲打或撞击，这可能会损坏变送器的内部精密元件，导致测量不准确甚至设备故障。

When using the GRAEFF magnetic pen, it should be avoided to place it in a strong magnetic field environment, such as near large motors, transformers and other equipment, so as not to affect the magnetism of the magnetic pen, and then interfere with its operation effect on the pressure transmitter. At the same time, it is strictly prohibited to use a magnetic pen to knock or impact the pressure transmitter, which may damage the internal precision components of the transmitter, resulting in inaccurate measurement and even equipment failure.

（二）日常维护

Routine maintenance

    日常使用后，用干净柔软的布擦拭磁性笔，保持笔头清洁，避免灰尘、油污等杂质附着在笔头上影响其磁性和操作性能。对于压力变送器，定期检查外壳是否有损坏、接线是否松动，并保持其周围环境的清洁干燥，防止灰尘、湿气等进入变送器内部，影响其正常工作。在存放磁性笔和压力变送器时，应选择干燥、通风、无强磁场干扰的环境，避免阳光直射和高温潮湿。

 

    After daily use, wipe the magnetic pen with a clean and soft cloth to keep the pen tip clean and avoid dust, oil and other impurities attached to the pen tip affecting its magnetism and operating performance. For the pressure transmitter, regularly check whether the shell is damaged, whether the wiring is loose, and keep its surrounding environment clean and dry to prevent dust, moisture, etc., from entering the transmitter, affecting its normal work. When storing magnetic pens and pressure transmitters, you should choose a dry, ventilated environment without strong magnetic field interference, avoid direct sunlight and high temperature and humidity.