GE Datex-Ohmeda Aisys Carestation Reference Manual page 153

Troubleshooting
M1046983 04/08
Stage 2 Calibration Failures
The Calibration will fail if the:
• Flow valve DAC reaches 4095 before determining the Lift-Off Point.
• Previously found DAC value is ≥ to the current DAC value while finding points
7 through 24.
• Previously recorded flow for a previous DAC is > the previous flow for a
previous DAC.
• End point DAC of 4095 does not give a flow > 100 l/min.
Possible causes for calibration failure:
• Check Altitude and Drive Gas selection.
• Leaks around the test plug or Calibration Flow Orifice.
• Leaks in Vent Engine Interface Manifold – Inspect for leaks.
• Inadequate drive gas supply (cannot deliver > 100 l/min).
• Drive gas regulator not adjusted / stable – Check regulator calibration.
• Insp Flow Valve not linear – Replace Insp Flow Valve.
5 Calibration
5-15