SES 2422 OUT2422工業(yè)模塊
增加增益電位計的設(shè)置可提供更快的瞬態(tài)響應(yīng)（降低突然變化引起的速度變化幅度負(fù)載中）。為了獲得最佳響應(yīng)，緩慢增加增益（轉(zhuǎn)動電位計，順時針），直到電壓表上的電壓略微變?yōu)椴环€(wěn)定，然后根據(jù)需要緩慢逆時針旋轉(zhuǎn)增益，以穩(wěn)定儀表讀數(shù)。步進加載發(fā)電機，或撞擊致動器終端軸，以確保原動機返回到正確的速度速度設(shè)置的過沖或過沖很少。為了減少過沖，增加復(fù)位（順時針轉(zhuǎn)動電位計）。
當(dāng)復(fù)位電位計處于其調(diào)整的下部時（0至3開電位計刻度），順時針增加復(fù)位可能需要降低增益（逆時針轉(zhuǎn)動增益電位計）至保持穩(wěn)定運行。
如果原動機返回正確速度較慢，則減小復(fù)位逆時針轉(zhuǎn)動電位計圖3-1說明了原動機完全通過斜坡時間電位計啟動逆時針方向（無斜坡，注意不要過度扭轉(zhuǎn)罐），步驟四種不同復(fù)位電位計設(shè)置下的負(fù)載，以及穩(wěn)定、穩(wěn)態(tài)運行條件。這些是自然曲線上的典型性能曲線吸氣式（非渦輪增壓）柴油發(fā)動機。
增益不一定能獲得最佳性能電位計處于最大穩(wěn)定順時針位置
在某些情況下在這種情況下，增益必須略微降低，以確保以下條件下的穩(wěn)定性廣泛變化的條件。執(zhí)行器補償調(diào)整如果按照初始預(yù)啟動中的說明設(shè)置了致動器補償設(shè)置，通常不需要進一步調(diào)整。如果是緩慢的周期性不穩(wěn)定性保持，稍微增加執(zhí)行器補償（轉(zhuǎn)動電位計順時針），并重復(fù)增益和復(fù)位調(diào)整。繼續(xù)增加執(zhí)行器補償并重新調(diào)整增益并復(fù)位直到達到穩(wěn)定。如果明顯存在快速不穩(wěn)定或極為活躍的執(zhí)行器，則稍微降低執(zhí)行器補償（逆時針轉(zhuǎn)動電位計）。如果必要時，執(zhí)行器補償可完全逆時針設(shè)置（注意不要過度扭轉(zhuǎn)鍋）。這可能是發(fā)動機啟動時需要的扭轉(zhuǎn)會導(dǎo)致燃油連桿過度移動。低怠速調(diào)整1.原動機應(yīng)大致處于額定速度，低怠速電位計設(shè)置為最大值（完全順時針方向，小心而不是過度扭轉(zhuǎn)鍋）。打開額定值的外部閉合聯(lián)系2.降低低怠速（逆時針轉(zhuǎn)動電位計）直到達到推薦的怠速。
Increasing the setting of the GAIN potentiometer provides faster transient
response (decreases the magnitude of the speed change from a sudden change
in load). To achieve optimum response, slowly increase the GAIN (turn the
potentiometer clockwise) until the voltage on the voltmeter becomes slightly
unstable, then slowly turn the GAIN back counterclockwise as necessary to
stabilize the meter reading. Step load the generator, or bump the actuator
terminal shaft, to make sure that the prime mover returns to the proper speed
with little overshoot or undershoot of the speed setting. To reduce overshoot,
increase the RESET (turn the potentiometer clockwise).
When the RESET potentiometer is in the lower part of its adjustment (0 to 3 on
the potentiometer scale), increasing the RESET clockwise may require
decreasing the GAIN (turning the GAIN potentiometer counterclockwise) to
maintain stable operation.
If the prime mover is slow in returning to the proper speed, decrease the RESET
by turning the potentiometer counterclockwise
Figure 3-1 illustrates prime mover starts with the RAMP TIME potentiometer fully
counterclockwise (no ramp—be careful not to overtorque the pot), step
loadings at four different RESET potentiometer settings, and stable, steady-state
running conditions. These are typical performance curves on a naturally
aspirated (non-turbocharged) diesel engine.
Optimum performance is not necessarily obtained with the GAIN
potentiometer at the maximum stable clockwise position. In some
cases, the gain must be reduced slightly to ensure stability under
widely varying conditions.
Actuator Compensation Adjustment
If the ACTUATOR COMPENSATION is set as described under Initial Prestart
Settings, no further adjustment is normally required. If a slow periodic instability
remains, slightly increase the ACTUATOR COMPENSATION (turn the
potentiometer clockwise), and repeat the GAIN and RESET adjustments.
Continue to increase the ACTUATOR COMPENSATION and readjust the GAIN
and RESET until stability is achieved.
If a fast instability or extremely active actuator is evident, slightly decrease the
ACTUATOR COMPENSATION (turn the potentiometer counterclockwise). If
necessary, the ACTUATOR COMPENSATION may be set fully counterclockwise
(be careful not to overtorque the pot). This may be required when engine
torsionals cause excessive fuel-linkage movement.
Low Idle Speed Adjustment
1. The prime mover should be approximately at rated speed with the LOW
IDLE SPEED potentiometer set at maximum (fully clockwise—be careful
not to overtorque the pot). Open the external CLOSE FOR RATED
contact.
2. Decrease the LOW IDLE SPEED (turn the potentiometer counterclockwise)
until the recommended idle speed is reached.
