ABB传感器PFEA111-112中英文手册(8)

One load cell signal (一个压力传感器发信号)

When single side measurement is selected the measured signal is multiplied by two and presented as web tension on display and analog output.。

选定单边测量时，张力测量装置把测量信号乘以2显示并以模拟量输出。

The nominal load is selected from the list below and must be the same as the nominal load on the cell name plate. The load cell nominal load is displayed in KN and 1bs on the same row. The following nominal loads can be selected: 额定负载是在下面列表中经选择的，必须与标牌上的额定负载相同；压力传感器额定负载显示为KN 和1bs (镑)

3.12.4 Zero Set (调零)

NOTE

Zero set must be done with no tension applied to the roll.

调零时必须轧辊上无施加压力

3.12.5 Set Wrap Gain (设置包角增益)

To be able to present actual web tension on the display, the ratio between tension and measured force on the load cell must be determined.

能在显示器上呈现实际的纸幅张力，比率在压力与设定过的压力传感器规定值之间。 This ratio is a scaling factor called Wrap Gain. 这个比率是包角增益的换算系数。

The Wrap Gain depends on the web’s wrap angle on the measuring roll and the orientation of the load cells. Therefore, Wrap Gain depends on the actual installation. This gives:

T (tension)=Wrap Gain×FR(force of web tension in load cell measuring direction) 增益由测量轧辊和定向压力传感器决定，因此增益收实际安装的影响。 这个公式：

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T(张力)= 增益×FR(强制压力传感器测量指示的纸幅张力) 包角增益是由缠绕在测量辊的角度和压头的定位决定。

There are two ways to find out the ratio between web tension and measured force on the load cells, by Hanging weights or by Calculation.

有两个方法了解到在纸幅张力和测量过的强制压力传感器的比率

· With hanging weights (Menu Hang Weight) 关于悬挂砝码 (Hang Weight 菜单) String a rope that follow the web path exactly and apply a known weight. 用绳子顺着幅面的方向准确悬挂上已知砝码

The resulting known weight simulates the actual web tension and the electronics measures the resulting force on the load cells caused by the applied weight.

用已知重量重物模拟实际幅面材料张力，装置测量施加在压头最终的力。

When both web tension (T) and the corresponding measured force (FR) are known the tension electronics calculates the ratio T/FR and stores the value as Wrap Gain.

张力测量装置用两个幅面张力T和对应的已知对应力FR计算出比率T/FR并把该数值作为包角增益存入。

When web tension is applied to the roll the tension electronics calculates web tension by multiplying the measured force on the load cells with the Wrap Gain.。

张力测量装置测量棍子上幅面张力是作用于棍子上的力再乘以幅面包角。

After the hanging weight procedure the wrap gain calculated by the tension electronics can be found in the Enter Wrap Gain menu.

通过悬挂重物的过程，张力测量装置在已有的菜单Enter Wrap Gain menu计算出包角。 · By calculation (Menu Enter Wrap Gain) 计算 (菜单Enter Wrap Gain )

Wrap Gain is a scaling factor which corresponds to the ratio between Web Tension (T) and the force component (FR) from web tension that is acting in the load cell measuring direction.

包角增益是一个比例因子，它是幅面张力和压头测得的实际的力的比率。

The Wrap Gain range is 0.5-10. If you try to set the wrap gain outside this range, the message “Out Of Range” will be shown on the display. The wrap gain can be set with a resolution of 0.01.

增益范围是0.5-10 如果你设法调整增益在这个范围以外，信息提示“Out Of Range (超出范围)”就会显示出来，增益精度设置为0.01

Examples describing the principle of calculating Wrap Gain:

描述计算增益的法则：

See calculation of Wrap Gain in Appendix (B,C,D or E) for installed load cell type. 领会在附录 (A,B,C或D)中关于安装压力传感器的不同类型，其增益的计算 3.12.8 Miscellaneous Menu 混合菜单 3.12.8.1 Profibus

? Profibus On/Off 开/关

The Profibus can be enabled or disable. Profibus可被用或不可用

? Profibus address Profibus 地址

If the Profibus is enabled, the Profibus must be set in the range 000-125. 如果Profibus可用的，地址必须在000-125的范围内。 Read more about the Profbus in Section 3.13. 3.12.8.2 Set Factory Default 设置出厂默认值

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? Set factory default

The parameter are set as on delivery except Maximum load A and Maximum load B. 除了最大负载A和最大负载B其他的参数都被传输。

Read more in Appendix A.4 Factory Default Settings. 3.12.9 Service Menu 服务菜单

The service menu has parameters that can be viewed only and parameters that can be set. If single side measurement is selected in menu SetObject input B is not connected.

保养菜单有只读参数和也有可设置的参数。如果选择单边测量输入B将不被连接。…

? Parameters that can be viewed only: 只读的参数

- Software version number 软件版本号 - Maximum load A 最大负载A

Displays maximum load since last reset 显示新的设置后的最大负载 - Present offset A 显示偏移量A

Displays zero offset at last zero set 显示新设置后的零偏移量 - Maximum load B 最大负载B

Displays maximum load since last reset 显示新的设置后的最大负载

- Present offset B 显示偏移量B

Displays zero offset at last zero set 显示新设置后的零偏移量

? Parameter that can be set: 可设置的参数

- Reset A 重设A

This action sets “Maximum load A” to zero. “最大负载A”清零 - Reset B 重设B

This action sets “Maximum load B” to zero. “最大负载B”清零

3.12.9.1 Maximum Load/Present Offset 最大负载/显示偏移量

For each load cell connected to the web tension electronics PFEA 111/112, a maximum load memory will store the highest load that is applied to the load cells respectively. The maximum load memory can be reset if a load cell is replaced.

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