Xylem OxiTopIS OC100 - Manual (Page 91)

What to do if...? What to do if...?
90 BA31114e5 07/2006 BA31114e5 07/2006 91
Requirements /
Problems Procedure / Problem solutions
Measuring head
unintentionally started
for measurement
Measuring head
started with incorrect
settings
Measuring head is
required for another
sample Problem solution
The measuring head can be released again through the
command Reset/release:
Chapter “GLP/Tools
- Maintenance - Reset/release “ .
The controller guides you further through the operation.
If only one measuring head is stored under the
corresponding sample number (in the routine BOD
operating mode, this is always the case), the controller
automatically erases the sample in the sample
management.
Search for the
defective measuring
head Procedure:
• Perform a measuring head reaction test (see above).
A measuring head that repetitively shows no reaction to
the test is defective.
• If the defective measuring head cannot be established
in this way, perform the measuring head check (see
“Single check”). In doing this, each individual measuring
head must be checked until the defective measuring
head has been found.
A measuring head is
missing or is defective.
Requirement:
To determine the
corresponding sample Procedure:
Call up the function “Call up data” from the sample
management for each individual unfinished sample. The
corresponding sample can be determined by this.
For subsequent error handling, see the chapter “Sample
management - Call up data”.
Requirements /
Problems Procedure / Problem solutions
The precision and
sealing of the system
sample bottles plus
measuring head
should be checked Procedure:
See the chapter “GLP/Tools - Check - Cal test “
Measuring head check
(single check)
(To which running
sample does the
selected measuring
head belong?)
Procedure:
Single check method:
menu “GLP/Tools - Check - info”
• The controller guides you further through the operation.
• All single information on the state of the measuring
heads is listed, i.e. the measuring head responds.
• The check can be undertaken at any time without
affecting the measurement that is running.
• If no reaction at all can be determined, the batteries
should be changed and the measuring head check
repeated.
• The measuring precision cannot be checked with this!
The measuring
precision of the
measuring head
should be checked. Procedure:
Pneumatic test (PT) of the measuring head:
see the chapter “GLP/Tools - Check - Pneumatic test”
Perform measuring
head reaction test Procedure:
• Menu “GLP/Tools
- Check - Show all ” :
• All optically attainable measuring heads must flash for
approx. 5 seconds independent of their status.
• The check can be undertaken at any time without
affecting the measurement that is running.
• This test only checks the reaction to commands.
• If no measuring head reacts, the controller should be
checked.