Hitachi ZA3000 Series, Инструкция по эксплуатации

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4.1 Data Table
4 - 4
Measurement result data may be accompanied with an error
mark.
Although measurement can be continued by ignoring an error
mark, data may lose reliability. It is therefore recommended to
take a corrective measure listed below.
Indication Cause Remedy
E Light intensity is 120 or
higher.
In manual measurement, execute auto-zero.
If lamp warm-up is not adequate in the autosampler
mode, this mark may be attached to data for some time
after start of measurement. In this case,
remeasurement is required.
If this mark still appears despite warm-up for 10 to
15 minutes or longer, deterioration or abnormal
discharge of the lamp can be thought. Check the
lamp.
X Absorbance of STD2 to 10
is 0.001 or lower.
Make sure each standard sample has been prepared in
correct concentration.
C Absorbance of unknown
sample is at least 5%
higher than the maximum
absorbance of standard
sample.
Analyst should judge the allowable absorbance range
above the upper limit of working curve, that the
absorbance of an unknown sample may reach.
When necessary, change concentration of the
unknown sample or standard sample and measure
again.
L The concentration of the
unknown sample was
lower than the detection
limit.
Check if a wrong sample was set.
B Reference signal is higher
than 1.5.
The background absorbance exceeds the allowable
range of correction. Dilute the sample or reduce the
sample matrix.
A Sample signal is higher
than 1.5.
The linear range of general working curve may be
exceeded, though this depends on element.
So, dilute the sample and measure again.
R Rollover has occurred due
to high concentration.
(This function is active in
"Manual" mode.)
Dilute the sample and measure again.
S In the peak width method,
the width of interest has
not been found (not been
determined), and the peak
height has been used as
an alternative.
The peak width method is not used for flame analysis.
Change the peak width to be provided, and carry out
measurement again.
If the peak is too steep, its width may not be
determined uniquely.
F Concentration could not be
determined
The working curve is not a continuously increasing
function (two concentration values correspond to one
absorbance value). Make sure the order of standard
samples is correct and the concentrations are
appropriate. Then, carry out measurement again.
O The concentration exceeds
the allowable numeric
range for display.
Input concentration correction again so that the
corrected concentration value will not become
extremely large. Or dilute a sample and measure
again.
H The background correction
has not been performed
properly.
Carry out measurement again.
The error marks are indicated in the following order of priorities: H > E > A > B > X > S > R > F > L > C
4.1.1 Error Marks