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How to operate the digital whiteness meter correctly? It adopts semiconductor light source technology, which can be turned on continuously for 24 hours, automatically calibrated, and the indicators such as instrument stability, reliability, and light source life have been improved
.
Let's take a look at how the whiteness meter should operate correctly
.
1.
Turn on the power supply and place the probe on the standard blackboard, warm up for 15 minutes before starting the test.
2.
Zero adjustment and calibration zero
.
Calibration: Put the probe on the standard whiteboard and adjust the calibration knob of the main unit to make the data match the value calibrated on the whiteboard.
3.
Measurement A.
For the whiteness measurement of general objects or for some samples treated with fluorescent whitening agents, measure their Whiteness value after whitening.
After the instrument is zeroed and calibrated, the displayed value of the instrument tested on the sample is the whiteness value of the sample
.
B.
Measurement of opacity (T); conforms to ISO2471-77 standard
.
(1) Put the sample on the instrument for testing, then remove the upper layer of the sample and place it on the lower layer, and test in sequence.
A total of five layers of samples are measured, and the reflection factor R∞ of each layer of samples is recorded
.
(2) Take the five-layer samples tested above with a blackboard as the substrate, and record the light reflection factor R0 on the surface of each layer
.
(3) Repeat steps (1) and (2) to measure the R∞ and R0 values on the reverse side of each layer of the sample respectively
.
(4) Calculate the average value of R∞ and R0 on the front and back of the sample
.
(5) Calculate the opacity value (T) of the front and back; calculate the opacity of each side to 0.
5%, if the difference is greater than 0.
5%, the opacity of the front and back should be identified separately; if the difference is not greater than 0.
5%, it should be Report the overall average
.
The above is the relevant introduction about the operation method of the whiteness meter.
I believe that everyone has a corresponding understanding of this after reading it, and operating it in the correct way can ensure the accuracy of the test, and I hope it will be helpful to everyone
.
.
Let's take a look at how the whiteness meter should operate correctly
.
1.
Turn on the power supply and place the probe on the standard blackboard, warm up for 15 minutes before starting the test.
2.
Zero adjustment and calibration zero
.
Calibration: Put the probe on the standard whiteboard and adjust the calibration knob of the main unit to make the data match the value calibrated on the whiteboard.
3.
Measurement A.
For the whiteness measurement of general objects or for some samples treated with fluorescent whitening agents, measure their Whiteness value after whitening.
After the instrument is zeroed and calibrated, the displayed value of the instrument tested on the sample is the whiteness value of the sample
.
B.
Measurement of opacity (T); conforms to ISO2471-77 standard
.
(1) Put the sample on the instrument for testing, then remove the upper layer of the sample and place it on the lower layer, and test in sequence.
A total of five layers of samples are measured, and the reflection factor R∞ of each layer of samples is recorded
.
(2) Take the five-layer samples tested above with a blackboard as the substrate, and record the light reflection factor R0 on the surface of each layer
.
(3) Repeat steps (1) and (2) to measure the R∞ and R0 values on the reverse side of each layer of the sample respectively
.
(4) Calculate the average value of R∞ and R0 on the front and back of the sample
.
(5) Calculate the opacity value (T) of the front and back; calculate the opacity of each side to 0.
5%, if the difference is greater than 0.
5%, the opacity of the front and back should be identified separately; if the difference is not greater than 0.
5%, it should be Report the overall average
.
The above is the relevant introduction about the operation method of the whiteness meter.
I believe that everyone has a corresponding understanding of this after reading it, and operating it in the correct way can ensure the accuracy of the test, and I hope it will be helpful to everyone
.
