15
Analysis of a typical sample manually from the touchpad
:
The following parameters should be selected:
1.
COD range:
Advanced Blue / Green / Yellow / Red,
select the appropriate range based on the original
concentration of sample/analyte.
2.
Reference Solution:
only if the reference solution (Calibrant) provided is not used. Enter the value for
your own solution
3.
Display units for COD
: ppm or mg/L
4.7 Running a Sample
A complete analysis consists of the following steps:
i.
Pre-conditioning of blank (Pre-Burn, Port B) – ensures that the sensor and electrodes are stable.
ii.
Pre-burn of sample (Pre-Burn, Port A) – preconditions the sensor to the sample matrix.
iii.
Oxidation of sample (Oxidation, Port A) – a small amount of sample is advanced into the cell and is
analyzed to obtain the COD value. The instrument is measuring the charge liberated from the oxidation
reactions.
To run a sample manually from the touchpad:
1.
Press
RUN
.
2.
The analyzer will beep. Check that the flow line from Port A is placed in the vial containing your sample
and confirm that the correct COD range is selected.
3.
Press
ENTER
to begin analysis.
The COD value will be displayed at the end of the analysis.
All COD values are stored in the Result Log, until cleared manually or overwritten by new entries.
To access the Result Log manually from the touchpad:
1.
Press
MENU
, select
Data
and press
ENTER
.
2.
In the Data menu, select
Result Log
and press
ENTER
.
3.
The COD value for the most recent analysis will be displayed. Use the left and right arrow touch keys to
access previous COD values.
Each result log entry will contain the sample number, COD value, date and time. If an error had occurred during
the sample run, the event log will store the error code and corresponding date and time.
Содержание L100 PeCOD
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