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Operation
The absorbance detected by the analyzer is assumed to be absorbance produced by
reagent(s) and DI water.
After each analysis cycle using DI water, record the "Absorb." Value on the
display screen (Fig. 5.4)
Continue performing analysis cycles using DI water until three readings are
obtained that agree within 0.0020.
4. To store this value as the blank, from the PROGRAM menu, select the CALIBRATION
Menu.
5. Press and hold down the BLANK key.
This will refresh the stored BLANK value; it can be refreshed only after a
completed analysis cycle with the analyzer in stand-by mode.
NOTE: Pressing the BLANK key will enter the current Absorbance value being
read by the photocell, regardless of the process involved. Holding down the
BLANK button at a time other than when the last reading was the blank analysis
will create significant problems.
6. Reconnect the sample line to the fast-loop reservoir.
SLOPE (FACTOR) CALIBRATION
6.3
A manual factor (slope) calibration should be performed during the initial start-up, after reagent
replacement, and after any period of extended shut-down. The recommended and default setting
for automatic calibration is approximately once per week.
1. Login with the 1st level service password (1111).
2. Connect the CAL tube to the calibration standard.
3. Check that the calibration standard is the correct concentration.
a. From the PROGRAM Menu, select CALIBRATION.
b. The concentration of the standard is displayed in blue.
c. To change the standard concentration, press the displayed standard value.
d. Type the new concentration and select ENT.
4. From the RUN Menu, select EXTRA. The analyzer will perform a calibration cycle and
store the new calibration factor.
5. Perform an EXTRA Cycle two to three times with the calibration standard to ensure a
repeatable calibration factor.
6. To check the value of the calibration factor, from the PROGRAM Menu select
CALIBRATION to open the calibration menu window.
SINGLE ANALYSIS CYCLE
6.4
The analyzer can be set to run either in continuous analysis mode or single analysis mode.
Follow the steps below to perform a single analysis cycle.
NOTE:
1. Connect the sample tubing to the fast-loop reservoir and turn on sample flow to the fast
41
When starting the analyzer for the first time or restarting it
from any period of shutdown, do not proceed to run an
analysis cycle until a calibration has been performed.
Waltron User Manual 101-016-B.3
3041 Silica Analyzer
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