SES 2409 INP2409工控備件
繼續非常緩慢地調整中的額定轉速電位計適當的方向，試圖停止致動器之間的電壓最小和最大電壓。因為不可能停止運動，當電壓緩慢變化時停止調整。評級速度電位計現在設置得非常接近所需速度。輕蔑發動機運轉時的調整將實現精確的速度。
檢查轉速傳感器
操作電子設備所需的轉速傳感器的最小電壓控制為1.0 Vrms，在盤車速度或最低控制下測量速度對于本測試，在盤車時測量電壓，速度傳感器連接到控制器。盤車前，確保防止原動機從開始。在控制器速度較低值的5%處范圍內，故障轉速感應電路被清除。例如，100Hz是在2000至6000 Hz的速度范圍內（2000 Hz x 0.05=100 Hz）需要。
準備在啟動時緊急停機發動機、渦輪機或其他類型的原動機，以防止失控或超速，可能造成人身傷害、生命損失，或財產損失。
調整穩定運行
如果原動機運行穩定，請轉至“速度設置調整”
程序如果原動機快速擺動，則緩慢降低增益（轉動電位計逆時針）直到性能穩定。調整增益可能導致瞬時速度變化，可通過轉動慢慢地增加電位計。
如果原動機低速擺動，增加復位（轉動電位計順時針），直到原動機穩定。如果增加復位電位計不能穩定原動機，也可能必須：?緩慢降低增益（逆時針轉動電位計），或?緩慢降低增益并增加致動器補償。
速度設置調整原動機運行穩定，外部速度微調電位計（如果使用）設置在中間位置，調整額定轉速電位計以使原動機至所需運行速度。
動態調整增益和復位電位計調整的目的是獲得最佳或期望的穩定原動機速度響應。
將直流模擬電壓表連接到端子20（+）和21（-）以監控執行器電壓。
調整增益可能會導致速度的瞬時變化，從而可以通過緩慢轉動增益電位計來最小化。
Continue to very slowly adjust the RATED SPEED potentiometer in the
appropriate direction, trying to stop the actuator voltage between the
minimum and maximum voltages. Because it is not possible to stop the
motion, cease adjusting when the voltage changes slowly. The RATED
SPEED potentiometer is now set very close to desired speed. A slight
adjustment when the engine is running will achieve the exact speed.
5. Check the speed sensor.
Minimum voltage required from the speed sensor to operate the electronic
control is 1.0 Vrms, measured at cranking speed or the lowest controlling
speed. For this test, measure the voltage while cranking, with the speed
sensor connected to the control. Before cranking, be sure to prevent the
prime mover from starting. At 5% of the lower value of the control’s speed
range, the failed speed sensing circuit is cleared. For example 100 Hz is
required on the 2000 to 6000 Hz speed range (2000 Hz x 0.05 = 100 Hz).
Be prepared to make an emergency shutdown when starting the
engine, turbine, or other type of prime mover, to protect against
runaway or overspeed with possible personal injury, loss of life, or
property damage.
Adjust For Stable Operation
If prime-mover operation is stable, go to the “Speed Setting Adjustment”
procedure.
lf the prime mover is hunting at a rapid rate, slowly decrease the GAIN (turn the
potentiometer counterclockwise) until performance is stable. Adjusting the GAIN
may cause a momentary speed change which can be minimized by turning the
GAIN potentiometer slowly.
If the prime mover is hunting at a slow rate, increase the RESET (turn the
potentiometer clockwise) until the prime mover stabilizes. If increasing the
RESET potentiometer does not stabilize the prime mover, it also may be
necessary to either:
? Slowly decrease the GAIN (turn the potentiometer counterclockwise) or
? Slowly decrease the GAIN and increase the ACTUATOR COMPENSATION.
Speed Setting Adjustment
With the prime mover operating stably, and the external speed trim potentiometer
(if used) set at mid-position, adjust the RATED SPEED potentiometer to bring the
prime mover to the desired operating speed.
Dynamic Adjustment
The object of the GAIN and RESET potentiometer adjustment is to obtain the
optimum, or desired, stable prime-mover-speed response.
Connect a dc analog voltmeter to terminals 20 (+) and 21 (–) to monitor the
actuator voltage.
Adjusting the GAIN may cause momentary changes in speed which
can be minimized by turning the GAIN potentiometer slowly.
