Doosan DP158LDF - Magnetic Speed Sensor Connections; Remote Speed Adjustment

8. Fuel system
143
9. Accessory power supply: The +10[V] and 20[mA] of
current supply, Terminal P, can be utilized to provi
de
p
ower to governor system accessory and for various
other purposes
Magnetic speed sensor connections
1. With the engine stopped, adjust the gap between the
m
agnetic speed sensor and the ring gear teeth. The
gap should not be any smaller than 0.45mm. Usually,
backing out the speed sensor by 3/4 turn after
touching the ring gear teeth will achieve a satisfactory
air gap.
2. The signal from the speed sensor can be measur
ed
b
etween C and D in engine operation.
3. Signal VAC 3 or above is required for the controller.
Remote speed adjustment
1. As illustrated in DV2213106A, a remote speed adjust-
ment potentiometer can be used to adjust the engine
speed over specific speed range. Select the desired
speed range and the corresponding potentiometer
value. When the minimum speed setting is used in
remote adjustment mode, the speed drop phenom-
enon may occur due to instability and load in the
system. To maintain engine stability at the minimum
speed setting above, a small amount of droop can be
added by turning (7)Droop counterclockwise. On the
other hand, at the maximum speed setting, the
governor performance will be near Isochronous
regardless of the droop adjustment setting
DV2213106A
Potentiometer Value by Speed Range
Factory-set Value
CAUTION
Wrong or erroneous wiring and battery voltage can
cause fatal damage to the controller.
GJ K L
CW
Speed
range
Pote
tiometer
value
Engine RPM for Each Ring
Gear
160 teeth 152 teeth 146 teeth
900Hz 1K 337rpm 355rpm 370rpm
2,400Hz 5K 900rpm 947rpm 986rpm
3,000Hz 10K 1,125rpm 1,184rpm 1,230rpm
3,500Hz 25K 1,315rpm 1,381rpm 1,438rpm
3,700Hz 50K 1,387rpm 1,460rpm 1,520rpm
300611-00683
Overspeed
1,725rpm (No. of teeth =
160)
Run lamp Maximum CW
Gain Mid-range (12 O’clock)
Stability Mid-range (12 O’clock)
Starting Fuel
Full CW
a
(Maximum Fuel)
a. CW: Clockwise
Speed Ramping 9 O’clock
Droop
Full CCW
b
(Minimum)
b. CCW: Countclockwise
Adjustment (No. of teeth = 160)
Speed Adjustment 4,000Hz (1500rpm)
Idle Adjustment 2,133Hz (800rpm)
300611-00684
Overspeed
2,070rpm (No. of teeth =
160)
Run lamp Maximum CW
Gain Mid-range (12 O’clock)
Stability Mid-range (12 O’clock)
Starting Fuel
Full CW
a
(Maximum Fuel)
Speed Ramping 9 O’clock
Droop
Full CCW
b
(Minimum)
Adjustment (No. of teeth = 160)