Verifying Wavelength Accuracy And Wavelength Repeatability; Verifying Photometric Accuracy And Photometric Repeatability - Onda V-11 SCAN Instruction Manual

Verifying Wavelength Accuracy and Wavelength Repeatability

Select Tab Wavelength accuracy in the Performance verification interface.
Reference NIST SRM 2034 Holmium Oxide Solution or equivalent
Material:
Measurement: 1. Put the Reference Material defined as Blank in the measurement
channel, close the sample chamber cover, press the wavelength value,
type in the wavelength of measurement, press the button Zero;
2. Put the Reference Material in the measurement channel, press the
button Measure;
3. Repeat step 2 to do measurement at least 3 times. The difference
between the average of the measurements and the standard value is
the Error of Indication of the specific wavelength. The repeatability of
specific wavelength is calculated as:
a)
b)
s
r
n = number of meausurements
t = t student (probability 95%, degree of freedom = n-1)
4. Repeat step 1-3 to do measurement at every wavelength of interest.

Verifying Photometric Accuracy and Photometric Repeatability

Select Tab Photometric accuracy in the Performance verification interface.
Reference Range VISIBLE: NIST SRM 930e or equivalent
Material: Range UV: NIST SRM 935a or equivalent
Measurement: 1. Put the Reference Material defined as Blank in the measurement
channel, close the sample chamber cover, press the wavelength value,
type in the wavelength of measurement, press the button Zero;
2. Put the Reference Material in the measurement channel, press the
button Measure;
3. Repeat step 2 to do measurement at least 3 times. The difference
between the average of the measurements and the standard value is
the Error of Indication of photometric value. The photometric
repeatability of is calculated as:
a)
b)
s
r
n = number of meausurements
t = t student (probability 95%, degree of freedom = n-1)
4. Repeat step 1-3 to do measurement at every wavelength of interest.
Standard deviation of the measurement results, for at least 10
measurements
With the formula below for a number of measurement <10
�� =
= standard deviation of results
Standard deviation of the measurement results, for at least 10
measurements
With the formula below for a number of measurement <10
�� =
= standard deviation of results
21
95%
�� ∗ ��
��
��−1
√ ��
95%
�� ∗ ��
��
��−1
√ ��
EN