21
Note:
Sample presentation to the instrument is a very important part of the
measurement. For best results you should establish a sample and instrument
handling technique which gives the most repeatable results for each type of sample.
Whenever a measurement warning message appears there are three options:
1.
You may depress the square
MODE
key. In this case the instrument ignores the
warning condition and proceeds to process the measurement data as if the condition
did not occur. When you select this option you are accepting responsibility for the
measurement quality. You may want to do this, for example, if you know that you are
measuring translucent samples and higher external light is expected.
2.
Your second option is to depress the green
DO
key. This will cancel the measurement
process and no data will be stored.
3.
Do nothing. In this case the error message will timeout after 30 seconds and the
measurement will abort as if you had depressed the green
DO
key.
Another message which may appear is:
This message will appear when the variation between repeat measurements within a
measurement sequence is larger than expected, which may indicate unsteady optical
sensor positioning, or high electrical noise on the power lines during measurement.
The message:
is displayed when the ambient temperature during the measurement has been changing
faster than a preset limit. This will normally occur when you have moved the instrument
from one room to another and the instrument has not had an opportunity to reach an
equilibrium with the room environment. It may also occur if you are operating in the
direct air flow path of an air conditioning or heating system.
The message:
is displayed if the unit is at a temperature that is too far from the temperature at which it
was calibrated.
Press MODE if OK
Sample steady?
Press MODE if OK
Temp not stable?
Press MODE if OK
Not at Cal Temp?
