Advanced Instruments 4250, User Manual

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Advanced
®
Cryoscope Model 4250 User’s Guide
72
This message indicates that you need to re-
calibrate your instrument. Recalibrate closely
following the instructions in Chapter 4. If the
error message repeats, obtain Hot-Line
Service.
Most likely, this message indicates that you
should reset your block and sample probe bin
numbers as described in Chapter 2. If this
does not solve the problem, contact Advanced
Instruments for Hot-Line Service.
If your results are not repeatable, first check
that your operator technique is sound. Second,
use the A/D test to ensure that your sample
probe is working correctly. If you have ques-
tions or if this does not isolate the problem,
please call Hot-Line Service for assistance.
Test another aliquot of that sample in a clean
sample tube. Try testing samples known to
be within the range of the instrument.
This message can be displayed for a number of
reasons. Check your technique and the condi-
tion of your sampler. If neither of these is the
source of the problem, you should check your
sample and block probe numbers. If this does
not solve your problem, contact Advanced
Instruments for Hot-Line Service.
Test another aliquot of that sample in a clean
sample tube. Check/correct the probe bin
numbers. Correct the stir/freeze wire align-
ment and adjustment as necessary. Try to
minimize the effects of materials that tend to
cause premature crystallization. Make sure
“Recalibration Needed”
“Reset Probe Config.”
Results not repeatable
(too scattered)
“Sample Did Not
Freeze...”
“Sample Freeze Error...”
“Sample Pre-freeze...”