⑧
Continue tests. Raise platform directly, repeat steps
⑥⑦
until the data is generally
stable(Usually, we take the average value of the third, fourth and fifth experimental data in
the current test; several times tests are needed for sample of high viscosity.)
⑨
Repeat tests. Please clean the ring with slowly running clear water before burning (If
possible, please use the ultrasonic water.) to prevent the ring from being destroyed by
material difficult to burn in the liquid to be tested. Repeat steps
⑤⑥⑦⑧
.
⑩
Change the ethanol to distilled water. Repeat steps
③④⑤⑥⑦⑧⑨
.
3.3 Parameter calculation: platinum plate operation
Calculate parameters with distilled water and high purity ethanol before the test (For
example, if distilled water parameters need correction and the sample is ethanol, just
replace the test liquid with distilled water in operation steps)
①
Install the holder and make it near the inside, avoiding directly leaning on the
connecting rod between sample stage and host.
②
Set parameter. Click "Parameter setting", set "Rise speed" "Fall speed". Because liquid
membrane tension occurs when sample table falls, fall speed should be slow as far as
possible.
③
Clean beaker and make infiltration. Wash a beaker with distilled water, and make
infiltration with test liquid-a little ethanol beaker, and pour it out.
④
Let sample stage go down and put into liquid to be tested. Click "Ring method",
"Platform down" to make platform down to the lowest and stop automatically. Add ethanol
into the beaker after infiltration and put the beaker on the platform.
⑤
Burn platinum plate and reset. Light the alcohol lamp. Gently remove the plate (there is
a right angle between the plate and the holder; make sure the platinum bottom is on the
level) and hold it with tweezers, burn it to red (don’t burn the holder; the fire is generally 45
degrees angle to the horizontal) and hang it on the hook gently. Press "TARE" button on