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HAFAABAAABE1BCA1XE控制面板
模拟输出模块在出厂前进行校准。为了确保模块的精度，您应该定期校准每个输出的微调罐。
对于25-45°C之间的操作，建议每隔12个月进行一次校准，以及0-60°C之间的6个月间隔。
所需工具校准模拟输出模块需要以下工具：
1） 编程面板
2） 精密电压表，精度为+/-0.0001伏，10伏刻度
3） 一把1/4英寸十字螺丝刀
4） 一把1/8英寸标准螺丝刀
标定程序下表显示校准B872-200模块的步骤：
步骤操作
1拆除模拟输出前面板上的两个螺钉和标签单元这样您就可以接触到装饰罐。每个输出有一个微调罐。这个第一个微调罐用于第一个输出，第二组用于第二个输出，依此类推。微调罐调整范围的总幅度（满标度）。请参阅下图。注0.1%公差是通过校准可达到的最大FSR精度
适用于任何电压范围。将任何范围校准为0.1%公差会稍微影响其他范围关i、 e.该通道剩余可用范围的公差不能为假设优于+/-0.25%FSR。
2打开模拟输出模块手柄，露出连接器和端子。
3将电压表负极引线（-）连接到通道1（模拟公共线CH1）和将导线（+）连接至通道1（模拟输出CH1）端子。参见电压表下面的连接图。
注：校准期间，现场接线可能保持连接。
4已选择所需电压范围。手动编程数据值4095输入通道2的输出寄存器。将通道输出电压与下表中给出的预期电压表读数。
5调整相应通道的（满标度校准）微调罐，以达到所需电压表读数。
6对其余通道重复步骤3至5。
7校准程序完成后，断开电压表，返回所有连接到其原始状态，关闭模块手柄，并更换前标签盖在装饰罐上的。程序结束B873-002和B875-002是可与984一起使用的模拟输入模块可编程控制器。这两个模块之间的唯一区别是B873-002有四个输入通道，B875-002有八个输入通道。
可以将模块设置为在标准范围（0000至4096）或升高范围（4095至8192）。它接受1.0至5.0伏的输入或4至20毫安。（参考B873-002和B875-002现场连接，第164页）。
输入转换为数值，范围从0001到4095（标准）。
或4096至8191（高架）。值0000、4095、4096或8192表示无效数据和可能的问题。（参考第162页的数据值参考图表）。这个值与输入信号成正比。例如，输入电压为3.0V导致模块发送值2048（标准）。或者输入可以是12mA，将产生值6144（高架）。（参考数据输入价值转换，第161页）。
The Analog Output Module
is calibrated at the factory prior to shipment. To ensure the module's accuracy, you should calibrate the trim-pots for each output regularly. Calibration is recommended at 12 month intervals for operation between 25-45 °C, and at 6 month intervals between 0-60 °C. Required Tools The following tools are needed to calibrate an Analog Output Module: 1) A programming panel 2) A precision voltmeter, with an accuracy of +/-0.0001 volts on a 10 volt scale 3) A 1/4 inch Phillips screwdriver 4) A 1/8 inch standard screwdriver Calibration Procedure The following table shows the steps to calibrate the B872-200 Module: Step Action 1 Remove the two screws and the label located on the front panel of the Analog Output module. This allows you access to the trim-pots. There is one trim-pot per output. The first trim-pot is for output number one, the second set is for output two, etc. The trimpots adjusts the range's total magnitude (full scale). Refer to the figure below. Note The 0.1% tolerance is the maximum FSR accuracy achievable thru calibration for any volt range. Calibrating any range to the 0.1% tolerance throws the other slightly off; i.e., tolerances for the remaining ranges available to that channel cannot be assumed better than +/- 0.25% FSR. 2 Open the Analog Output module handle to expose the connectors and terminals. 3 Connect the voltmeter minus lead (-) to the channel 1 (Analog Common CH1) and the plus lead (+) to the channel 1 (Analog Output CH1) terminal. Refer to the Voltmeter Connections Diagram below. Note Field wiring may remain connected during calibration. 4 With the desired voltage range already selected. Manually program a data value of 4095 into the output register for channel two. Compare channel output voltage with anticipated voltmeter reading given in the table below. 5 Adjust the (full scale calibrate) trim-pot for corresponding channel to get desired voltmeter reading. 6 Repeat steps 3 through 5 for remaining channels. 7 After the calibration procedure is complete, disconnect the voltmeter, return all connections to their original state, close the module handle, and replace the front label that covers the trim-pots. END OF PROCEDURE
The B873-002 and B875-002
are analog input modules that can be used with 984 Programmable Controllers. The only difference between the two modules is that the B873-002 has four input channels and the B875-002 has eight input channels. The module can be set to produce a data value in the Standard Range (0000 to 4096) or the Elevated Range (4095 to 8192). It accepts inputs of 1.0 to 5.0 volts or 4 to 20 milliamperes. (Refer to B873-002 & B875-002 Field Connections, p. 164). The input is converted to a numerical value, ranging from 0001 to 4095 (Standard). or 4096 to 8191 (Elevated). Values of 0000, 4095, 4096, or 8192 indicate invalid data and a possible problem. (Refer to the Data Value Reference Chart, p. 162). The value is directly proportional to the input signal. For example, an input voltage of 3.0V causes the module to send a value of 2048 (Standard). Or the input could be 12mA, which would produce a value of 6144 (Elevated). (Refer to Input to Data Value Conversion, p. 161).
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