SNAT634PAC变频器卡件
称重传感器在两个方向上具有相同的灵敏度，因此可以将称重传感器安装在最简单的方式。
典型的安装布置为水平和倾斜安装。
2.5.1坐标系为称重传感器定义了坐标系。这在力计算中用于推导力称重传感器主方向上的分量。
如果方向符号R、V和A被识别为力分量F的后缀，则表示各个方向上的力分量。后缀R可以省略，当测量方向由上下文暗示。
倾斜安装
“倾斜安装”指称重传感器相对于水平面倾斜的布置飞机在某些情况下，这是唯一的选择。
计算力时，必须使用以下公式：FR=T×[cos（β+γ）-cos（α-γ）]
FRT=皮重×sinγ
FRtot=FR+FRT=T×[cos（β+γ）-cos（α-γ）]+（-Tare x sinγ）FV
=T×[sin（α-γ）+sin（β+γ）]FVT=-皮重×cosγ
FVtot=FV
+FVT=T×[sin（α-γ）+sin（β+γ）]+皮重×cosγ
哪里：
T=腹板/带材张力
FR=测量方向上腹板/带材张力的分力，R
FRT=皮重在测量方向上的分力，R
FRtot=测量方向上的总力，RFV
=横向腹板/带材张力的分力，V
FVT=皮重在横向上的分力，V
FVtot=横向总力，V
皮重=皮重产生的力
α＝#相对于水平面的侧倾一侧的反射角
β＝#相对于水平面的滚动另一侧的反射角
γ=称重传感器安装表面相对于水平面的角度
为称重传感器提供0.5 a、330 Hz的交流电。二次信号已校准
对于分压器R1的正确灵敏度：
-R2，并提供温度补偿通过热敏电阻T。
次级侧上的所有电阻都相对较低。输出阻抗通常为1-3Ω，
这有助于抑制干扰。概述该设备是一种精密仪器，必须小心处理。
称重传感器在安装前不得拆开包装
为了达到规定的精度、最佳的可靠性和长期稳定性，称重传感器必须按照以下说明进行安装。另请参见中的6.4故障跟踪机械安装。
•当PFTL 101AER或PFTL 101 BER型称重传感器用于耐酸
应用建议使用奥氏体耐酸适配器板和螺钉钢
信息对于这些称重传感器类型的所有类型的装置，必须使用奥氏体钢，优选耐酸或不锈钢。
The load cell has the same sensitivity in both directions, so that the load cell can be installed in
the easiest manner.
Typical mounting arrangements are horizontal and inclined mounting.
2.5.1 Coordinate System
A coordinate system is defined for the load cell. This is used in force calculations to derive force
components in the load cell principal directions.
Where direction designations R, V and A are recognized as suffixes for force components, F, this
represents the force component in the respective direction. The suffix R may be omitted, when
measuring direction is implied by the context.
Inclined Mounting
Inclined mounting means arrangements in which the load cell is inclined relative to the horizontal
plane. In some cases this is the only option.
When calculating the force, the equations below must be used:
FR = T × [cos (β + γ) - cos (α - γ)]
FRT = Tare × sin γ
FRtot = FR + FRT = T × [cos (β + γ) - cos (α - γ)] + (- Tare x sin γ)
FV
= T × [sin (α - γ) + sin (β + γ)]
FVT = - Tare × cos γ
FVtot = FV
+ FVT = T × [sin (α - γ) + sin (β + γ)] + Tare × cos γ
where:
T = Web/strip tension
FR = Force component from web/strip tension in measurement direction, R
FRT = Force component from Tare in measurement direction, R
FRtot = Total force in measurement direction, R
FV
= Force component from web/strip tension in transverse direction, V
FVT = Force component from Tare in transverse direction, V
FVtot = Total force in transverse direction, V
Tare = Force due to tare weight
α = #eflection angle on one side of the roll relative the horizontal plane
β = #eflection angle on the other side of the roll relative the horizontal plane
γ = Angle for load cell mounting surface relative the horizontal plane
The load cell is supplied with a 0.5 A, 330 Hz alternating current. The secondary signal is calibrated
for the correct sensitivity with a voltage divider R1
- R2
, and temperature compensation is provided
by thermistors T.
All resistances on the secondary side are relatively low. The output impedance is typically 1-3 Ω ,
which helps to suppress interference.General
The equipment is a precision instrument which, although intended for severe operating conditions,
must be handled with care. The load cells should not be unpacked until it is time for installation.
To achieve the specified accuracy, the best possible reliability and long-term stability, the load cells
must be installed in accordance with the instructions below. See also 6.4 Fault Tracing in the
Mechanical Installation.
• When a load cell type PFTL 101AER or PFTL 101BER is used for an acid resistant
application it is recommended to use adapter plates and screws of austenitic, acid resistant
steel.
Information
For all types of installations of these load cell types, austenitic steel must be used,
preferably acid resistant or stainless steel.
