Hello team,
I am trying to calibrate the IGV on GE Frame 5, but the difference between the manual values I input and the actual IGV position is much and difference gets bigger as I try to move the IGV to fully open i.e from (45-85 Deg)
Manual Setpoint: 45
Actual Reading on machine:45
Manual Setpoint: 65
Actual Reading on machine:50
Manual Setpoint: 85
Actual Reading on machine:55
Manual Setpoint: 105
Actual Reading on machine: 70
Manual Setpoint: 130(displays 128 on the autocal)
Actual Reading on machine:85
This is a rough description of the readings. The unit has been down for a while(approx 1 year) and we just finished a HGPI on it, to the best of my knowledge the IGV was operating fine. We have 80bar of Hydraulic pressure, the servo was replaced (Moog), the IGV blades have been cleaned. Please what else can be done? , also what is the ideal servo current and LVDT voltage (not sure if this is phrased properly) , I have uploaded the autocal screen?
1) Type of Mark* being used = Mark V(TMR)
2) Did you perform a servo current polarity check after replacing the servo and before starting this "calibration" procedure?=Yes
3) Have you been changing the Null Bias Current value when you have been "calibrating" the IGVs?=NO
4) What is the Null Bias Current value presently running in the Mark* right now?= ?? How can I measure this??
And one more thing:
5) What are the values of the LVDT voltages when the IGVs are fully closed (somewhere around 45 DGA, or slightly less)? 34DGA
LVDT 1 voltage- <R> -0.306 , <S> -0.315 ,<T> -0.302
LVDT 2 voltage- <R> -0.277 , <S> -0.275 ,<T> -0.277
I am trying to calibrate the IGV on GE Frame 5, but the difference between the manual values I input and the actual IGV position is much and difference gets bigger as I try to move the IGV to fully open i.e from (45-85 Deg)
Manual Setpoint: 45
Actual Reading on machine:45
Manual Setpoint: 65
Actual Reading on machine:50
Manual Setpoint: 85
Actual Reading on machine:55
Manual Setpoint: 105
Actual Reading on machine: 70
Manual Setpoint: 130(displays 128 on the autocal)
Actual Reading on machine:85
This is a rough description of the readings. The unit has been down for a while(approx 1 year) and we just finished a HGPI on it, to the best of my knowledge the IGV was operating fine. We have 80bar of Hydraulic pressure, the servo was replaced (Moog), the IGV blades have been cleaned. Please what else can be done? , also what is the ideal servo current and LVDT voltage (not sure if this is phrased properly) , I have uploaded the autocal screen?
1) Type of Mark* being used = Mark V(TMR)
2) Did you perform a servo current polarity check after replacing the servo and before starting this "calibration" procedure?=Yes
3) Have you been changing the Null Bias Current value when you have been "calibrating" the IGVs?=NO
4) What is the Null Bias Current value presently running in the Mark* right now?= ?? How can I measure this??
And one more thing:
5) What are the values of the LVDT voltages when the IGVs are fully closed (somewhere around 45 DGA, or slightly less)? 34DGA
LVDT 1 voltage- <R> -0.306 , <S> -0.315 ,<T> -0.302
LVDT 2 voltage- <R> -0.277 , <S> -0.275 ,<T> -0.277
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