Hach BioTector B3500ul, User Manual

Page: 103 / 167

Page 103
8.2.4 COD/BOD Program
DISPLAY ---- ▪ 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 (µgO/l) if
required. See Section
8.2.8 4-20mA Program for details.
STREAM 1 1.0 0.0
TOC FACTOR 1.0
STREAM 2 1.0 0.0
TOC FACTOR 1.0
STREAM 3 1.0 0.0
TOC FACTOR 1.0
…………………… ……… ……
STREAM 6 1.0 0.0
TOC FACTOR 1.0
▪
In Stream 1 1.0 0.0 setting , the first setting “1.0” acts as the
“OVERALL FACTOR” and the second setting acts as the
“OFFSET FACTOR” in the following equation:
▪ COD (and/or BOD) = [Overall Factor * (TOC Factor * TOC)] +
Offset Factor
▪
In TC analysis mode, instead of the TOC FACTOR, the TC
FACTOR is displayed in this menu and used in above equation.
▪ 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.
8.2.5 New Reagents Program
SPAN CALIBRATION NO
▪
SPAN CALIBRATION (NO by default) defines if the Span
Calibration reactions are part of the Install New Reagents
procedure in Reagents Setup menu.
▪ If SPAN CALIBRATION is activated (YES), the standard solution
needs to be connected to the Calibration/Manual port of the
BioTector as part of the Install New Reagents procedure. See
concentrations of the TOC STANDARD defined in Span
Calibration menu (see Section
2.3.2 Span Calibration
for details).
SPAN CHECK NO ▪ SPAN CHECK (NO by default) defines if the Span Check
reactions are part of the Install New Reagents procedure in
Reagents Setup menu.
▪ Note that both SPAN CALIBRATION and SPAN CHECK
functions cannot be selected as YES simultaneously and cannot
occur together in the Install New Reagents procedure.
AUTOMATIC RE-START YES
▪
AUTOMATIC RE-START (Yes by default) defines BioTector to
return automatically online operation having completed the
Install New Reagents cycle.