APPLICATION NOTES VALVE CHECKERG040-123伺服阀检测仪说明书型号G040-123翻译：许国超本文件供参考2010年6月CONTENTS 目录Chapter Title Page 扉页1. Description 3产品描述 32. Specification 7规格说明3. Quick Start 9快开4. Connecting to valve and plant 11阀的设备连接5. Plant mode operation (in line) 12工作模式操作（在线）6. Checker mode operation (stand alone) 15检测模式操作（离线独立）7. External 24V supply 17外部供电24V8. Valve performance checks 18阀性能检测9. Block diagram 20流程图DESCRIPTION 产品描述The Moog G040-123 Valve Checker is an instrument capable of checking the flow control function of nearly the complete range of Moog electrical feedback(efb) proportional and servo valves. Mechanical feedback (mfb) and pressure control valves are not catered for by the G040-123.穆格 G040-123型伺服阀监测仪是一种能对穆格阀就近能对阀的流量控制，比例阀和伺服阀电气信号反馈检测的仪器。
带机械反馈的压力控制阀不能用G040-123型检测仪。
The feature that makes it so versatile is the way it can test a valve while thevalve is still installed in its normal operating plant. This is done at two levels,“in line” and “stand alone”.这种仪器特点能对安装在阀台上正常工作的阀门进行多方面的检测和操作。
这里有两种测试方式：在线检测和独立检测。
Plant (In Line) 工厂工作（在线检测）As in fig a) the plant and valve operate normally. In fig b) the Valve Checker isconnected between the plant electronics and the valve such that all the plant electronics’ signals, to and from the valve, are connected as normal. The ValveChecker monitors the plant electronics’ signals and the signals back from thevalve, enabling a check of the valve’s performance.图a为电气线路与控制阀通常连接方式；图b为伺服阀检测仪串联在电气线路和控制阀总电气线路之间，保证阀输出输入线路在正常状态。
检测仪器能检测电气信号和输入给阀信号，来检测阀的性能。
Checker (Stand Alone) 检测模式（独立检测）In this mode the plant command is switched out while the Valve Checker generates the command to the valve and monitors the signals back from it. Thevalve remains installed in the plant but the plant command signals are disconnected. Checking while still installed in the plant provides the added benefit of checking the valve by observing the reaction of the plant to the ValveChecker’s commands.在这个模式下操作，工厂工作指令被断开，检测仪的控制信号输给阀，阀的反馈信号在回到检测仪。
尽管检测仪还串联在电路中，但工作的信号已经被断开。
检测的同时，可以由检测员给出指令来监测被测阀的动态变化。
The Valve Checker is powered by the plant electronics which also continue tosupply the valve in both plant and checker modes of operation. As well, there is a +24V DC power connector on the front panel for 24V DC and ± 15V DC powered valves, without connection to the plant electronics’ power.检测仪的供电源由原电路供给，同时能继续提供给被检测的阀在“工作”和“检测”模式操作提供电源。
同样这里的24V直流电源可以提供阀电子元件所需的24V直流电源或± 15V 直流电源。
无须外接其它的电器电源。
Two cables connect the Valve Checker to the plant electronics and valve. Each of the Valve Checker models is dedicated to a power supply voltage and connector type. It is necessary to select the model type that has the correct connector and supply voltage. The table below shows the model numbers and their supply/connector types.连接在检测仪的两条电气线一条接供给的电线，另一条接被检测阀的上。
不论检测仪那个模式下都是这样连接来提供电源电压和连接方式（接头一般类型一样），对于必须要选择类型的要纠正连接类型和提供的电源电压。
下表提供的是型号和电源电压参数Model dash number table:零件模块参数表Model dash 型号— connector 接头、插接件 supply 供给There are six functional blocks on the front panel.在面板上有六个的功能模块1. Q Command 电流指令 4. Control 控制2. Spool 滑阀 5. Enable 开启，允许3. Power 电源 6. Valve Connector 阀连接接口Q Command 电流指令This block is active only when checker mode is selected. The rotary pot adjuststhe Q command level.只有在选在“检测模式”下这部分模块才能投入使用，旋转钮是调整电流的大小量的。
The grey test point gives a 0 to 10V signal proportional to the actual voltage orcurrent being delivered to the valve. The rotary selector switch selects the signal type that is connected to the valve.这个灰色的测电位点提供0V~10V成比例的输出真是电信号，信号主动传递给被检测的阀件，旋转的扶手开关选着输给阀信号的类型The +/- switch connects the valve Q command signal to the non-inverting (+ve gives P A) and inverting (+ve gives P B) inputs.这个“+/-”开关是连接阀的Q指令开关，开关在“+”位置（阀给油P A）输入，在“-”位置（阀给油P B）输入。
Spool滑阀The spool position signal from the valve is always available at the green spooltest point and passed on to the plant electronics regardless of the mode of operation. The green spool test point gives a 0 to 10V signal proportional tothe spool signal from the valve. The LED display to the left of the test point provides a rudimentary indication of the signal. The centre blue null LED willbe illuminated when the spool signal is less than 10.不论哪种控制模式下，从阀来的阀芯位置信号总是在测试点上呈绿色，这些绿色测试点上的电信号与提供的0 ~ 10V电信号成正比例。
LED指示灯显示左边的测试点的迹象,提供了一个初步的信号，中心蓝色的LED零位指示灯在阀芯电信号小于10%时才亮。
An understanding of the checker load switch is important for successful use ofthe Checker, when the spool signal is a current (10mA or 4-20mA). When the valve has a current output there must be a path through which the current can flow, for the Checker to be able to measure the current. When the plant lectronics do no provide this load, or the Checker is not connected to the plant electronics, the Checker load switch connects a 100 Ohm load to ground (0V) on the spool signal, enabling a current to flow.检查员了解负荷开关,并成功运用的检查是很重要的。