SNAT634PAC變頻器卡件
稱重傳感器在兩個方向上具有相同的靈敏度，因此可以將稱重傳感器安裝在最簡單的方式。
典型的安裝布置為水平和傾斜安裝。
2.5.1坐標系為稱重傳感器定義了坐標系。這在力計算中用于推導(dǎo)力稱重傳感器主方向上的分量。
如果方向符號R、V和A被識別為力分量F的后綴，則表示各個方向上的力分量。后綴R可以省略，當測量方向由上下文暗示。
傾斜安裝
“傾斜安裝”指稱重傳感器相對于水平面傾斜的布置飛機在某些情況下，這是唯一的選擇。
計算力時，必須使用以下公式：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/帶材張力
FR=測量方向上腹板/帶材張力的分力，R
FRT=皮重在測量方向上的分力，R
FRtot=測量方向上的總力，RFV
=橫向腹板/帶材張力的分力，V
FVT=皮重在橫向上的分力，V
FVtot=橫向總力，V
皮重=皮重產(chǎn)生的力
α＝#相對于水平面的側(cè)傾一側(cè)的反射角
β＝#相對于水平面的滾動另一側(cè)的反射角
γ=稱重傳感器安裝表面相對于水平面的角度
為稱重傳感器提供0.5 a、330 Hz的交流電。二次信號已校準
對于分壓器R1的正確靈敏度：
-R2，并提供溫度補償通過熱敏電阻T。
次級側(cè)上的所有電阻都相對較低。輸出阻抗通常為1-3Ω，
這有助于抑制干擾。概述該設(shè)備是一種精密儀器，必須小心處理。
稱重傳感器在安裝前不得拆開包裝
為了達到規(guī)定的精度、最佳的可靠性和長期穩(wěn)定性，稱重傳感器必須按照以下說明進行安裝。另請參見中的6.4故障跟蹤機械安裝。
?當PFTL 101AER或PFTL 101 BER型稱重傳感器用于耐酸
應(yīng)用建議使用奧氏體耐酸適配器板和螺釘鋼
信息對于這些稱重傳感器類型的所有類型的裝置，必須使用奧氏體鋼，優(yōu)選耐酸或不銹鋼。
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.
