GE DigitalFlow GS868, Руководство по обслуживанию

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DigitalFlow™ GS868 Service Manual 19
Chapter 2. Error Codes and Screen Messages
2.6 E4: Signal Quality
Problem:
The signal quality is outside the limits programmed in the
SETUP
submenu of the User Program .
Cause:
The peak of the upstream or downstream correlation signals has fallen below the correlation peak limit, as
set in the
SIGNL
submenu. This may be caused by a flowcell or electrical problem.
Action:
Check for sources of electrical interference and verify the integrity of the electronics console by
temporarily substituting a test flowcell that is known to be good. Check the transducers and relocate them,
if necessary. See Chapter 3,
Diagnostics , for instructions.
2.7 E5: Amplitude Error
Problem:
The signal amplitude exceeds the limits programmed in the
SETUP
submenu of the User Program .
Cause:
Excessive levels of an attenuating gas, such as CO
2
, are present in the flowcell. Solid or liquid particulates
may be present in the flowcell.
Action:
Refer to Chapter 3, Diagnostics , to correct any flowcell problems.
2.8 E6: Cycle Skip, Accel.
Problem:
The acceleration exceeds the limits programmed in the
SETUP
submenu of the User Program .
Cause:
This condition is usually caused by poor flow conditions or improper transducer alignment.
Action:
Refer to Chapter 3, Diagnostics , to correct any flowcell and/or transducer problems.
2.9 E7: Analog Out Error
Problem:
The current in the analog output circuit exceeds the limits for the analog output port.
Cause:
The output load exceeds the specified limits for the analog output port.
Action:
Make sure the output load is <550 ohms for the
Slot 0
analog outputs or is <1000 ohms for an analog
outputs option card.
2.10 E8: Temp In
Problem:
This message indicates a temperature input error.
Cause:
The temperature exceeds the specified limits for the analog inputs option card or no input device is
connected.
Action:
Check the temperature transmitter and the connecting cable. Refer to Chapter 1, Calibration , and
recalibrate the analog inputs on the option card.