47
Troubleshooting Table Troubleshooting
Symptom Explanation Suggested Action
38. Results not
repeatable (too
scattered).
• Sample probe and stir wire are not
properly positioned.
• Stir amplitude is too low or too
high.
• Freeze amplitude is too low or too
high.
• Sample probe is damaged or
defective.
1. Check sample probe and stir wire
alignment and position.
2. Stir amplitude should be mixing
sample briskly, but without
agitation or bubbles. Check and
adjust as needed.
3. Freeze amplitude should be just
sufficient to freeze sample. Too
low and the sample won’t freeze,
too high and sample will be
thrown up on the side walls of the
sample tube. Check and adjust as
needed.
4. Replace sample probe.
39. “Result Over Range,
Try Higher Setting”
(3250 only)
The sample tested in the low range
setting was over the low range limit.
Retest the sample in the high range
setting.
40. “Result Under
Range, Try Lower
Setting” (3250 only)
The sample tested in the high range
setting was under 1400 mOsm.
Retest the sample in the low range
setting.
41. “Sample Did Not
Freeze, Repeat Test”
The sample did not freeze (after
“buzzing”).
5. Make sure the sample tube is not
empty, and make sure the sample
is not too viscous.
6. Check the freeze amplitude.
7. Make sure the instrument is in the
proper range. (3250, only)
42. “Sample Freeze
Error, Repeat Test”
The sample did not freeze properly.
1. The sample may have been
contaminated. Retest with a fresh
sample.
2. Check the freeze amplitude.
3. Check the sample probe.
43. “Sample Pre-Freeze,
Repeat Test”
The sample has frozen prematurely
(before the “buzz”).
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.
44. “Sample Probe
Failure”
The sample probe has failed (usually
shorted).
Check the sample probe resistance
(2,300 ohms ±300 at room temp).
45. “Sample Probe
Open?”
The sample probe resistance is
greater than 10558 ohms.
1. Is the probe plugged in?
2. Check the sample probe
resistance (2,300 ohms ±300 at
room temp).
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