SES 2409 INP2409工控备件
继续非常缓慢地调整中的额定转速电位计适当的方向，试图停止致动器之间的电压最小和最大电压。因为不可能停止运动，当电压缓慢变化时停止调整。评级速度电位计现在设置得非常接近所需速度。轻蔑发动机运转时的调整将实现精确的速度。
检查转速传感器
操作电子设备所需的转速传感器的最小电压控制为1.0 Vrms，在盘车速度或最低控制下测量速度对于本测试，在盘车时测量电压，速度传感器连接到控制器。盘车前，确保防止原动机从开始。在控制器速度较低值的5%处范围内，故障转速感应电路被清除。例如，100Hz是在2000至6000 Hz的速度范围内（2000 Hz x 0.05=100 Hz）需要。
准备在启动时紧急停机发动机、涡轮机或其他类型的原动机，以防止失控或超速，可能造成人身伤害、生命损失，或财产损失。
调整稳定运行
如果原动机运行稳定，请转至“速度设置调整”
程序如果原动机快速摆动，则缓慢降低增益（转动电位计逆时针）直到性能稳定。调整增益可能导致瞬时速度变化，可通过转动慢慢地增加电位计。
如果原动机低速摆动，增加复位（转动电位计顺时针），直到原动机稳定。如果增加复位电位计不能稳定原动机，也可能必须：•缓慢降低增益（逆时针转动电位计），或•缓慢降低增益并增加致动器补偿。
速度设置调整原动机运行稳定，外部速度微调电位计（如果使用）设置在中间位置，调整额定转速电位计以使原动机至所需运行速度。
动态调整增益和复位电位计调整的目的是获得最佳或期望的稳定原动机速度响应。
将直流模拟电压表连接到端子20（+）和21（-）以监控执行器电压。
调整增益可能会导致速度的瞬时变化，从而可以通过缓慢转动增益电位计来最小化。
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.
