Device for debugging actuator by using digital multimeter
A digital multimeter and actuator technology, applied in the field of control systems, can solve the problems of high price, limited power supply battery capacity, inconvenient use, etc., and achieve the effects of convenient and reliable use and low cost
Active Publication Date: 2014-06-18
ANHUI QUANSHENG CHEM +1
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Problems solved by technology
However, these instruments are expensive, and due to the limited capacity of the power supply battery, it usually takes 2 to 3 hours to charge or replace the battery, which is extremely inconvenient to use
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[0009] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific illustrations.
[0010] Such as figure 1 As shown, a device for debugging an actuator with a digital multimeter includes a digital multimeter, a control room and an actuator, the controller in the control room is connected with the actuator and the digital multimeter, and it is characterized in that: one of the digital multimeters The test pen is disconnected through the switch K, and an adjustable resistor R is connected in series in the middle, and the digital multimeter is adjusted to use the current gear, that is, the 200mA gear, and the DCS or controller in the control room is adjusted to the corresponding output point to 100%, that is Output 20mA constant current to the actuator, connect the positive and negative test leads of the digital multimeter in par...
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The invention discloses a device for debugging an actuator by using a digital multimeter and relates to the technical field of a control system. The device comprises the digital multimeter, a control chamber and the actuator; a controller in the control chamber is connected with the actuator and the digital multimeter; the device is characterized in that a probe of the digital multimeter is disconnected and is in series connection with an adjustable resistor R; the digital multimeter is regulated to a current range, that is, at a position of 200mA; a corresponding output point of a DCS (Distributed Control System) or the controller in the control chamber is output to 100 percent, that is, the constant current of 20 mA is output to the actuator; positive and negative probes of the digital multimeter are correctly connected in parallel on wiring terminals of the actuator, and the current running through the digital multimeter is 0-20 mA by regulating a crude regulation switch K and a fine adjustable resistor R. According to the device for debugging the actuator by using the digital multimeter disclosed by the invention, the digital multimeter is changed slightly, the actuator is tuned conveniently and rapidly for a long time on the premise of not influencing the original functions; a signal generator with the value of near ten thousands RMB is replaced by a multimeter with the value of several hundred RMB, so that the low cost and the convenience and reliability in use are achieved.
Description
technical field [0001] The invention relates to the technical field of control systems, in particular to a device for debugging an actuator with a digital multimeter. Background technique [0002] The actuator is an important part of the automatic control system. Its function is to receive the signal sent by the controller and change the flow rate of the controlled medium, so as to maintain the controlled variable at the required value or within a certain range. The 4~20mA DC signal output by the control system (DCS, etc.) can control the electric actuator, or it can be converted into a standard air pressure signal by the electric-pneumatic converter or electric-pneumatic valve positioner to control the pneumatic actuator. Actuators are widely used in chemical production. Since the actuators are in direct contact with the controlled medium and are used continuously for a long time, it is inevitable that they will fail and need to be repaired. In order to ensure the control ...
Claims
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IPC IPC(8): G05B23/02
Inventor 杨玮
Owner ANHUI QUANSHENG CHEM