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  1. R

    GE Mark V Integrated Time Constant (ITC) First Order Lag

    See attached for some run data. The GE Data was grabbed from the ToolboxST Trender. It was LIVE as is data. You will see some NOX differences between GE and NEW. FSRXSR went from 82% to 82.75%.
  2. R

    GE Mark V Integrated Time Constant (ITC) First Order Lag

    I apologize for the delayed response. It has been a busy week around the plant. I will not post any run data publicly, but I would be willing to send you a trend of a unit ramping to Base Load through a direct message. The data is pulled from PI at two samples per second, with the compression...
  3. R

    GE Mark V Integrated Time Constant (ITC) First Order Lag

    I appreciate the feedback. Shortly before 2025, the decision was made to replace the GE Mark V controls with an Allen Bradley based control system, using Basler excitation and Woodward SPC controllers for the gas valves and IGVs. I will not disclose the third-party integrator, but they are...
  4. R

    GE Mark V Integrated Time Constant (ITC) First Order Lag

    Under the GE Mark V ITC First Order Lag function block, more specifically used under FSRNV3 - Speed Control FSR, under RESET: OUT=V, they use what appears to be a Pulse labeled "INIT" to trigger the ITC Reset to make OUT = to the Input (FSR). Has anyone come across what enables "INIT"? My guess...
  5. R

    EX2000BR Fault Code 749

    We had a fault code come in on the EX2000BR in its OFFLINE state. The fault code was "ST 749__OPCOINTR". One day prior we had a run, no issues. No maintenance was done. Just a random event at 1:00 AM. This happened on a EX2000BR with Mark V control system. For the record, anyone who can...
  6. R

    Flame Tracker Module Calibration FSM-1002-001 on GE Mark V

    I understand the company policy issue and I appreciate you taking the time to summarize it on here. The other day, I decided to touch channel 1 offset POT and adjust them on a flame scanner module NOT installed on the unit. It was a backup module. On channel 1, It must have been R29 (I didnt...
  7. R

    Flame Tracker Module Calibration FSM-1002-001 on GE Mark V

    I talked with Reuter Stokes and here is the summary from them: The minimum flame detection IO configuration setting of "16", as mentioned in TIL2028, is correct. It is independent of the Mark V diagnostic alarm D_1748_R S T. Factory acceptance for the flame sensor module would be to source at...
  8. R

    Flame Tracker Module Calibration FSM-1002-001 on GE Mark V

    I just realized how terrible my grammar can be at 5:30 am. Hah! I appreciate the feedback, I contacted Reuter Stokes so I will wait to hear an answer. I get from a business standpoint of making information "secret", however, it really is a doozy when GE documentation lacks critical information...
  9. R

    Flame Tracker Module Calibration FSM-1002-001 on GE Mark V

    The flame scanner / Flame Scanner module calibration is in regards to a GE Mark V that is running a 7EA Gas Turbine. We had a secondary flame scanner "crap" out on us so I had replaced it with an ITS Flame Scanner that followed GE spec. About two months after that install, we started getting a...
  10. R

    GE Mark V Electronic Overspeed Test on Cooldown

    Control System: GE Mark V TMR We currently have a procedure for testing the primary and emergency overspeed test on the Mark V TMR system. It was written by our controls engineer, however, he is no longer around to further pick his brain as to why he wrote it as he did. The procedure was...
  11. R

    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    1. Frame Size: 7EA 2. DLN System: DLN-1 Lo NOx 3. Gas Control Valves: Right Angle Fisher Valve EAB. On a side note, this unit always ran at a higher TTRF. We have 2050 (maybe its 2055) combustion parts. But at normal load, we would see 2040 while our other three units would get 2020ish...
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    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    The constants for the valve travel is .75 inches (if you need the markV signal name, I can look that up). If the system is thinking that the valve is opening/scaled to .75 inches but really only able to move/scaled to .72 inches, My gas valve is essentially opening more than it should based on...
  13. R

    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    The problem started showing itself again... Any I finally solved it. We started tracking a 4% error from the LVDT feedback (#1 and #2) to the reference point. It was made evident from an alarm on the HMI that appears when the comparison is 3% or greater from feedback to reference. Since both...
  14. R

    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    CSA, No problem providing the feedback, this site has helped me out many of times indirectly, it is time to repay the favor with my troubles. I was aware that TBQC on <R> did fan the regulators out to each of the units, however, the only TBQC card I had in stock I used on <S> core. Little...
  15. R

    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    I replaced TCQA and TCQC card today and it did NOT fix the issues with the auto calibration on Secondary Gas valve. I suspect that it may be an issue within the TCQA Prom Auto calibration program. I did what you said as well with the ribbon cables, that actually worked one time on another unit...
  16. R

    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    I appreciate the quick feedback. I try to research the best I can prior to posting. The MarkV Application/Maint GEH can only get you so far and after spending countless hours reading on Control.com about auto calibration on my iPhone in the PEECC with terrible service, it was finally time to...
  17. R

    GE Mark V Secondary Gas Valve Auto Calibrate Issues

    We received the following two alarms: D_3663_C Voter mismatch <S> Q_S_FDBK10 D_3656_C Voter mismatch <S> Q_S_POS19 Troubleshooting 101, what did you touch last? 24 hours prior to this alarm showing up, we had a contractor test our Chemtron CO2 system. They simulated all alarms, did a puff...
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