BENTLY 330780-50-00監測器卡件
確保原動(dòng)機速度由低速控制怠速電位計在高于最低燃油的范圍內致動(dòng)器或原動(dòng)機燃料架的位置（機械停止）。斜坡時(shí)間調整調整斜坡時(shí)間電位計，以獲得滿(mǎn)意的原動(dòng)機加速至額定速度，超調最小。首先，從完全順時(shí)針（最大斜坡時(shí)間，注意不要過(guò)度扭轉罐）位置并沿逆時(shí)針?lè )较蚍聪蚬ぷ?，直到裝置以盡可能快的速度傾斜渴望的啟動(dòng)燃油限制調整起動(dòng)燃油限制不建議用于反向作用控制。當速度信號丟失時(shí)，反向作用控制將如果速度信號出現故障，將執行器置于起動(dòng)燃油油位超馳被激活。反作用系統通常需要控制以在失去速度信號時(shí)要求滿(mǎn)油，以允許控制系統的機械備用調速器。起動(dòng)燃料可通過(guò)順時(shí)針旋轉電位計完全解除限制（注意不要過(guò)度扭轉鍋）。
當原動(dòng)機在額定速度和空載下運行時(shí)，記錄電壓跨接致動(dòng)器端子20（+）和21（-）。
關(guān)閉原動(dòng)機，并通過(guò)閉合超馳觸點(diǎn)激活故障速度信號超馳。這個(gè)執行器的電壓現在應可通過(guò)起動(dòng)燃油限制進(jìn)行調整電位計。將執行器電壓設置為比正向作用控制在額定速度下獲得的電壓，低于反向作用控制的額定轉速電壓。移除失效的速度信號如果不需要啟動(dòng)原動(dòng)機，則覆蓋觸點(diǎn)。
啟動(dòng)原動(dòng)機，觀(guān)察啟動(dòng)時(shí)間、速度設定超調，以及獲得煙霧排放。起動(dòng)燃油限制可調整為：需要優(yōu)化原動(dòng)機起動(dòng)特性。燃料限制當速度控制接管時(shí)，功能自動(dòng)關(guān)閉。
不需要啟動(dòng)燃料限制的原動(dòng)機，啟動(dòng)燃料完全轉動(dòng)電位計可停用限位功能順時(shí)針?lè )较颍ㄗ⒁獠灰^(guò)度扭轉鍋）。
速度傳感器檢查如果傳感器是磁性傳感器
測量端子28和之間的電壓29確保盤(pán)車(chē)速度下的最小電壓為1.0 V，最大電壓為額定速度下為30 Vrms。如果電壓超過(guò)30 V，則增大轉速傳感器，并確保盤(pán)車(chē)時(shí)仍至少有1.0 V電壓速度電流互感器（CT）定相檢查該控制器包含內部電流互感器。由于它們的低阻抗，短路它們的輸入是無(wú)效的。電流輸入必須從控制裝置上拆下并從外部短路。
高壓：切勿斷開(kāi)連接到負載傳感器的任何導線(xiàn)當原動(dòng)機運行時(shí)，端子4至9，除非：臨時(shí)1?, 如圖3-2所示安裝5 W電阻器，并且移除所有負載。電流互感器可以發(fā)展在啟動(dòng)時(shí)開(kāi)路時(shí)的危險高電壓移動(dòng)器正在運行。
Make certain that the prime-mover speed is controlled by the LOW
IDLE SPEED potentiometer in a range above the minimum-fuel
position (mechanical stop) of the actuator or prime-mover fuel rack.
Ramp Time Adjustment
Adjust the RAMP TIME potentiometer to achieve satisfactory prime mover
acceleration to rated speed with minimum overshoot. First, start at the fully
clockwise (maximum ramp time—be careful not to overtorque the pot) position
and work back in the counterclockwise direction until the unit ramps as rapidly as
desired.Start Fuel Limit Adjustment
Start-fuel limit is not recommended for use with reverse-acting
controls. With loss of speed signal, the reverse-acting control will
position the actuator at the start-fuel level if the failed-speed-signal
override is activated. Reverse-acting systems normally require the
control to demand full fuel on loss of speed signal to allow the
mechanical backup governor to control the system. The Start Fuel
Limit can be deactivated by turning the potentiometer fully clockwise
(be careful not to overtorque the pot).
With the prime mover operating at rated speed and no load, record the voltage
across actuator terminals 20 (+) and 21 (–). Shut down the prime mover and
activate the Failed Speed Signal Override by closing the override contact. The
voltage to the actuator should now be adjustable by the START FUEL LIMIT
potentiometer. Set the actuator voltage approximately 10% higher than the
voltage obtained at rated speed for forward-acting controls and 10% lower than
rated speed voltage for reverse-acting controls. Remove the Failed Speed Signal
Override contact if not required to start the prime mover.
Start the prime mover and observe the start time, overshoot of speed setting, and
smoke emissions obtained. The START FUEL LIMIT may be adjusted as
required to optimize the prime-mover starting characteristics. The fuel-limiting
function is turned off automatically when the speed control takes over.
For prime movers not requiring start-fuel limiting, the START FUEL
LIMIT function can be deactivated by turning the potentiometer fully
clockwise (be careful not to overtorque the pot).
Speed Sensor Check
If the sensor is a magnetic pickup, measure the voltage across terminals 28 and
29 to be sure there is a minimum of 1.0 V at cranking speed, and a maximum of
30 Vrms at rated speed. If the voltage exceeds 30 V, increase the gap of the
speed sensor, and be sure that there is still a minimum of 1.0 V at cranking
speed.
Current Transformer (CT) Phasing Check
This control contains internal current transformers. Due to their low
impedance, shorting their inputs is not effective. The current input
must be removed from the control and shorted externally.
HIGH VOLTAGE—Never disconnect any wire attached to load sensor
terminals 4 through 9 when the prime mover is running unless
temporary 1 ?, 5 W resistors are Installed as shown in Figure 3-2,
and all load is removed. The current transformers can develop
dangerously high voltages when open circuited while the prime
mover is running.
