Hi Guys,
Just wondering if you guys may have come across a problem similar as below. Any suggestions are much appreciated.
Application Information:
LM2500 (2 of) → Hydraulic Starting System → Speed Sensors
Speed Sensors = Honeywell 3090A
I/O Card = TREA Turbine Emergency Trip
We have two Passive Speed Sensors (77HS1/2) on our Hydraulic Starting System which continuously oscillate between 400 – 600RPM after the clutch has disengaged and the unit is online. When the unit is offline, both sensors read 0RPM as expected and during Startup the speed sensors respond as expected. Multiple modifications to the Air Gap and Resistor Networks have been made as per BH / GE without any success. Do you think this could be noise from when the machine is running? Shielding etc. has been checked too. This behavior is present on both units and the concern is that the sensors may reach the trip value of 900RPM, as they have done so once before.
Cheers
Just wondering if you guys may have come across a problem similar as below. Any suggestions are much appreciated.
Application Information:
LM2500 (2 of) → Hydraulic Starting System → Speed Sensors
Speed Sensors = Honeywell 3090A
I/O Card = TREA Turbine Emergency Trip
We have two Passive Speed Sensors (77HS1/2) on our Hydraulic Starting System which continuously oscillate between 400 – 600RPM after the clutch has disengaged and the unit is online. When the unit is offline, both sensors read 0RPM as expected and during Startup the speed sensors respond as expected. Multiple modifications to the Air Gap and Resistor Networks have been made as per BH / GE without any success. Do you think this could be noise from when the machine is running? Shielding etc. has been checked too. This behavior is present on both units and the concern is that the sensors may reach the trip value of 900RPM, as they have done so once before.
Cheers