Advanced Instruments 4D3 - Page 58

The Advanced
®
3D3/4D3 Service Manual
58
26. “Sample Freeze Error,
Repeat”
“Sample Freeze Error,
Repeat Test”
27. “Sample Pre-Freeze,
Please Repeat”
“Sample Pre-Freeze,
Repeat Test”
28. “Sample Probe
Failure”
29. “Sample Probe Open?”
30. “Serial Loop Failed”
(Hitachi processor only)
31. “Standards Reversed?
Please Repeat”
“Standards Reversed?
Repeat Calib”
32. “Stir/Freeze Failure”
“Stir System Failure”
33. “Supervisor Key
Needed, Press Stop”
34. “System Error: Trap”
“System Error: NMI”
“System Error: ID”
“System Error: Unknown”
“System Error: Requests”
“System Error: Primitive”
“System Error: Interrupt”
“System Error:
Communications”
“Illegal Error Code:
“Unknown Error”
“Memory Allocation
Error”
“ROM Serial Number
Error”
The sample did not freeze properly.
The sample has frozen prematurely
(before the “buzz”).
The sample probe has failed (usually
shorted).
The sample probe resistance is greater
than 10558 ohms.
RS-232 communications test failed.
The instrument was expecting “high”
calibrator standard and detected a value
below, equal or close to the “low” cali-
brator standard.
The stir/freeze mechanism may not be
functioning properly.
Operator/Supervisor keyswitch is in the
Operator position.
The software did not execute properly.
1. The sample may have been contaminated.
Retest with a fresh sample.
2. Check the freeze amplitude.
3. Check the sample probe.
1. The sample may have been contaminated.
Retest with a fresh sample.
2. Check sample/block probe bin settings.
3. Check the stir amplitude.
4. Check for stir driver noise.
Check the sample probe resistance (2,300
ohms ±300 at room temp).
1. Is the probe plugged in?
2. Check the sample probe resistance (2,300
ohms ±300 at room temp).
1. Was loop back connector attached?
2. Try lower baud rate.
3. If problem persists, consult factory serv-
ice.
Recalibrate the instrument with the calibrator
standards in the correct order.
1. Check the stir and freeze ampligudes.
2. Check stir driver/control circuits.
3. If problem persists, replace the processor
board.
1. Press the STOP key.
2. Set the keyswitch to the Supervisor posi-
tion.
1. Turn the power off and on.
2. If problem persists, replace the processor
board.
Symptom Explanation Suggested Action