18
7. Actual measurement
7.1 Cautions on measurement
•
When sample temperature and ambient temperature differ significantly, the upper left corner on
display blinks.
Here it blinks
When difference in temperature between sample in the cell and ambient comes within
approximately
±
5
°
C, it stops blinking.
If the measurement data is going to be saved manually, not automatically, you have to wait until the
data is stabilized after blinking stops.
•
If the difference is significant (more than 20
°
C) and the sample temperature is low, it will cause
measurement error with the measuring cell blurred. To avoid this, raise sample temperature close up to
the ambient before sampling.
•
When different kinds of sample are going to be measured, the measuring cell must be rinse cleaned each
time before a different type of sample is measured.
•
For measurement of highly viscous sample (more than 2000mPa
⋅
s), refer to the sampling method by a
plastic syringe separately sold.
•
When the separately available plastic syringe is used for sampling, if you need excessive pressure in
pushing the cylinder, stop injecting, and check the cell to see any solid clogged up and find out the cause
for remedy. If you should give extraordinary force, the joint will come off and the sample or solvent
will be splash out, leading to breaking the cell.
•
Before starting a measurement, check the affect on all the sample liquid contact parts.
∗
Sampling nozzle - PTFE
∗
Measuring cell
- Borosilicate glass
∗
Built-in syringe
- PP polypropylene
Before starting a measurement of whatever kind or nature, be sure to prepare appropriate solvent or
detergent.
•
When sampling a test material into the cell, be careful not to allow air bubble blended especially for a
sample of high viscosity. Take your time in sampling slowly and carefully. The possible cause for air
bubble is considered to be: leaking at screw to fasten syringe or sampling nozzle or gas generated in the
sample.
•
Fill up the measuring cell completely.
•
After a series of measurements is over, clean the system including inside wall of measuring cell to avoid
any residue of sample.
•
If the built-in syringe sticks, remove it and rinse clean thoroughly.
