YOKOGAWA WE440, User Manual

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<5. Calibration of the Instrument for Measurement Analysis>
5-7
IM 12Y18A04-01EN 1st Edition : Oct. 04, 2019-00
5.10.7 Collect Data
In collect data, the final reading is recorded and the final absorbance is displayed at the end of
the cycle.
The stability of the recorded reading depends on the specified stability criteria. You have the
choice of editing the stability criteria. To do this from the MAIN MENU follow the sequence:
MENU → SETUP → ANALYSIS PARAMETERS → STABILITY CRITERIA
Now the concentration is calculated (as follows) and the current concentration is updated.
Concentration = (Slope x Absorbance) + Intercept
(Where slope and intercept are from the CURRENT calibrated values of the instrument for
measurement.)
NOTE
If unstable and doesn’t meet the stability criteria, the info field will flash with the warning message
“COLLECTING DATA, UNSTABLE SIGNAL”.
5.10.8 Post Wash
The programmable POST WASH is to wash the reaction cell after the measurement and
evacuate any residue of the reaction mixed solution. This event is optional and can be disabled,
or the reaction cell can be washed with selectable sources with editable volumes and stir times,
with up to five programmable steps. To perform post wash after measurement, select ANALYSIS
PARAMETERS for the POST WASH EVENT.
To set the post wash parameters from the MAIN MENU follow the sequence:
MAIN MENU → SETUP → ANALYSIS PARAMETERS → (+) POST WASH EVENT → POST
WASH CYCLES
5.10.9 Measurement Data
The WE440 Phosphate Analyzer product stores measurement and calibration results for up
to 31 days. The data for each sample analysis cycle or calibration may be retrieved under
REVIEW RESULTS menu screen with the corresponding time stamp and other related operating
parameters.
Sample analysis data stores the date, time, concentration, units, temperature, wavelength and
status (Good or Fault) along with the faults for each measurement cycle.
Calibration data stores date, time, standard concentration, slope, intercept, temperature,
wavelength and status.
The stored results are displayed with respect to the selectable period of time such as: Last 12
Hours, Last 1 Day, Last 2 Days, Last 3 Days, Last 1 week, Last 2 weeks, Last 3 weeks, Last 4
weeks, All, which is selected as DATA RANGE. To display the measurement results from the
main menu follow the sequence:
MENU → VIEW DATA AND ALARMS → REVIEW ANALYSIS RESULTS →DISPLAY
NOTE
Validation results are ONLY reported on the display and the RS-232 at the time of running the
validation. Validation cycles are not stored and are not reported on the analog outputs.
5.10.10 Printing Results
The stored measurement results can be printed on to the Hyper Terminal (minicom in Linux)
through the RS-232 port within the selected data range. The selected data range is applicable to
displaying, printing and plotting of measurement results.