Monicon GTR-680, User Manual

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of fly wheel teeth; or the RPM of fly wheel versus the RPM of alternator charger. For
example: Set up the RPM numerator and the denominator to 1 to find input pulse from the
LCD.
(A) If the engine revolution is 1800 and alternator revolution is 460 (input pulse), the R.P.M.
numerator could be set to 90
→ (1800÷20)
and R.P.M. denominator could be set to 23
→(460÷
20)
.
Solution: 1800 / 460 = 3.913
The R.P.M. calculation formula is as below
R.P.M. = Input pulse * (RPM numerator / RPM denominator)
1800 = 460 * (90/23)
(B) If the engine revolution is 1500 and total count of fly wheel teeth in one second is 4437 (input
pulse), the R.P.M. numerator should be set to 45 and R.P.M. denominator should be set to 133.
Solution: 1500 / 4437 = 0.338
The R.P.M. calculation formula is as below
R.P.M. = Input pulse * (revolution numerator / revolution denominator)
1500 = 4437 * (45/133)
(C) If the teeth count of engine flywheel is 118. Assume the rated rpm of Gen-set is 1500
rpm. Then the 1500 rpm/50hz => 30 rpms/per second also generate 30 x 118 =3540
electronic signals. Then 1500 / 3540 = 0.423 (75/177=0.423), set the R.P.M. numerator to
75 and R.P.M. denominator to 177.
3. RPM Escape motor
Setting
：
Disable/ Enable
Default
：
Disable
Description
：
Disconnect starter motor by RPM setting
4. RPM Esc. Set point
Setting
：
300~900(RPM)
Default
：
480
Description
：
Disconnect starter motor when RPM reaches setting
5. RPM Disp. Source
Setting
：
Alternator / Frequency
Default
：
Freq.
Description
：
Converts the RPM from frequency or alternator speed.
6. O.S. Detection
Setting
：
Disable/ Enable
Default
：
Enable
Description
：
Activates over speed protection.
7. O.S. set point
Setting
：
1350~2100(RPM)
Default ：
1980
Description ：
If e
ngine speed is higher than setting, controller shuts down the engine only if