Operation
SPECTROCHECK — 07.05.2015
— 21
7.3.1
Preparing for the measurement
Note
An optimum measurement requires a good argon atmosphere inside the spark
stand. Therefore, the opening of the spark stand must always be covered. This will
prevent oxygen from entering. A flat sample is highly recommended.
Oxygen inside the spark stand may cause poor burn spots (see chapter 9
„Troubleshooting“.). To remove oxygen from the spark stand, use the "Flush"
button or the respective function key of the flush function.
Before starting the measurement, proceed as follows:
1. Ensure
that
the operating temperature of the optical system (35°C) was reached (see
function "Maintenance Reminder"),
the electrode gap is correct, see page 21,
the instrument is ICALized, see page 21 and
the correct and base-relevant parts have been installed, see page 21.
2.
If working with toxic samples, ensure to verify the safety precautions.
The measurement is now prepared.
ICALization of the measuring device (ICAL)
A reference sample is measured 4 times to perform an ICALization. The average
values of these measurement results are calculated and stored in the instrument.
In order to proceed with ICALization, follow the steps below:
1.
Insert a clean electrode into the spark stand, see page 26.
2.
Call up the ICAL function with the "ICAL" button or with the corresponding
function key.
3.
Follow the instructions on the screen and perform the necessary 4
measurements with the reference sample.
4.
Poor measurements are highlighted red in the ICAL measurement window
and can be deleted. Please repeat the respective measurements.
The instrument is ICALized.
Changing the base (multi-base instruments only)
When changing the base, the spark stand must be cleaned in order to avoid
memory effects, see page 24.
Clean the spark stand insert.
Change the mica washer, the electrode, and the electrode brush.
Preparation of the instrument for measuring another base is now complete.
