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STREAM
1 , 2
STREAM
2 , 1
STREAM
3 , 4
..................
...............
8.2.4 COD/BOD Program
DISPLAY
STREAM 1
TOC FACTOR
STREAM 2
TOC FACTOR
STREAM 3
TOC FACTOR
........................
STREAM 6
TOC FACTOR
RANGE
3
If the CONTROL is programmed as BIOTECTOR, the multi-
RANGE
3
stream valve sequence operates according to the STREAM and
RANGE
3
RANGE settings defined in this menu.
...............
...
In STREAM 1 , 2 setting, the first setting "1" represents the multi-
stream valve number (e.g. Stream Valve 1), and the second
setting "2" represents the number of reactions to be carried out
at this stream before switching to the next stream.
RANGE defines the operation range for each stream. In a multi-
stream system, the ranges are locked to Range 3 by default in
the factory. It is recommended to lock each stream to a
particular range (e.g. 1, 2 or 3), which is appropriate to the
concentration levels of the sample, in multi-stream systems.
The AUTO (AUTOMATIC) range change function is disabled in
multi-stream systems by default. If it is necessary to run any of
the streams with AUTO range change function, please contact
your local distributor or the manufacturer. When AUTO range
change function is used, a minimum of five analysis reactions is
recommended as BioTector needs to find the optimum operation
range automatically. Therefore, depending on the system
response, it may be necessary to discard the first two or three
analysis results, when the AUTO range change function is
selected for a specific stream.
----
DISPLAY function (--- not programmed by default) allows the
user to program (COD and/or BOD) the system to display and
send the relevant 4-20mA signals for COD and/or BOD (mgO/l)
if required. See Section
1.0
0.0
In Stream 1 1.0 0.0 setting , the first setting "1.0" acts as the
1.0
"OVERALL FACTOR" and the second setting acts as the
1.0
0.0
"OFFSET FACTOR" in the following equation:
1.0
COD (and/or BOD) = [Overall Factor * (TOC Factor * TOC)] +
1.0
0.0
Offset Factor
1.0
In TC analysis mode, instead of the TOC FACTOR, the TC
.........
......
FACTOR is displayed in this menu and used in above equation.
1.0
0.0
1.0
If the DISPLAY is programmed as COD and/or BOD above, the
system multiplies the TOC result of the corresponding stream
(STREAM 1-3) with the TOC FACTOR and with the OVERALL
FACTOR and adds the OFFSET FACTOR to calculate the COD
and/or BOD value.
The STREAM FACTOR for each stream is obtained following
the procedures described in information sheet "I030. TOC to
COD or BOD Correlation Method", which is available in the
MMC/SD card shipped with the BioTector.
Stream 1 factor is used for manual samples and calibration
standards.
8.2.8
4-20mA Program
for details.
Page 105
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