Xylem OxiTopIS OC100 - Manual (Page 87)

What to do if...? What to do if...?
86 BA31114e5 07/2006 BA31114e5 07/2006 87
Messages Explanations, causes and problem solutions
Lack of memory possible !
Memory for 11
free !
Continue Ã
Cause:
This message is used as information in the standard BOD
operating mode.
There is a lot of sample data stored in the sample
management. The memory is almost full.
It is still possible to start a sample as a parallel sample start
with 11 measuring heads (the number 11
used here is
an example, possible numbers: 1...11 ).
Problem solution, if necessary:
• Erase finished samples:
Chapter “GLP/Tools - Maintenance- Erase finished
samples”
• Alternative: Changing the instrument setting to
automatic erasing of finished samples:
Chapter “GLP/Tools - Settings - Memory - Erase: auto"
Memory lack !
No ready samples autom.
erasable!
Cause:
The instrument works with the setting, Erase memory “auto“
(automatically). The memory is full and only unfinished
samples are stored in the sample management.
The instrument can only erase finished samples
automatically.
Problem solution:
• Transfer the unfinished samples of the sample
management to the “finished“ state.
• To do this, call up the measurement data of all
measuring heads and perform the evaluation and
documentation for the measurement data of the finished
samples.
• If the measurement data of the measuring heads is not
yet finished, no instant remedy is possible!
The memory capacity limit of the instrument has been
reached.
Messages Explanations, causes and problem solutions
Memory lack !
Erase finished sample/s!
Cause:
• The instrument is working with the “manual“ setting of
Erase memory. The memory is full.
Problem solutions:
• Transfer the unfinished samples of the sample
management to “finished“ status
• Call up the measurement data of all the measuring
heads
• Perform evaluation and documentation of the
measurement data of finished samples.
• Erase finished samples from the sample management:
Chapter “GLP/Tools - Maintenance- Erase finished
samples”
Note: Only the finished samples in the sample
management are erased.
undef.
(Display in the curve
presentation or sample
statistics)
Causes:
• The selected measurement range has been exceeded.
• The sample filled was too warm.
• The AutoTemp function is switched off.
• The sample filled was very cold and has a low
consumption behavior (smaller BOD value).
• The system is not sealed
(bottle internal pressure = atmospheric pressure).
Avoiding the problem:
• Select the correct measurement range (see WTW
application report).
• Pretemper the sample more precisely.
• Switch on the AutoTemp function (only effective for
measuring times longer than one day).
• Check the system for leaks by means of visual checks:
Are the sealing surfaces of bottle and measuring head
clean and fault-free? Are there cracks in the sleeve,
bottle or measuring head?
• Perform “Cal test“ (see chapter “Check”).
• Check the incubator temperature.