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00→01：30→02：00→05：00→. Being, S：00：05 data printing every 5 seconds,
00：10 data printing every 10 seconds and so on.
b. After connecting the viscosimeter with printer, press printing key (Print)
once more. The command "on" will be printed on paper and then, data will start to
be printed. Press printing key (Print) again to stop printing data; the command
"Off" will be printed on paper.
8.
Measurement of a liquid with unknown viscosity
(1)
General principle of measurement: for samples with high viscosity, chose a
small rotor (nº 3 or 4) and a low rotation speed. For samples with high
viscosity, choose a big rotor (nº 1 or 2) and a high rotation speed. If during
measurement, the percentage of measurement is in a normal value between
20% and 90%, then the measured viscosity of the sample is correct.
(2)
First of all the viscosity range of the sample to be measured must be
estimated and then, choose the smallest rotor and low speed for samples
with high viscosity or choose the biggest rotor and high speed for samples
with low viscosity. In most cases, the rotor should be chosen at first and then
the rotating speed. For example, when choosing rotor nº 1 and rotating speed
is 60 rpm, the maximum viscosity that can be measured will be 100 mPa·s
(shown on display); if rotating speed is changed into 6 rpm, then the
maximum viscosity that can be measured will be 1000 mPa·s.
(3)
If the viscosity of the sample cannot be estimated, then the rotor and rotating
speed should be chosen in base of the percentage of measurement
(wresting square). A percentage in the range between 20% and 90% is a
normal value. If percentage is out of this range, an alarm will sound to remind
that the speed and rotor must be changed. Never forget to input the correct
rotor nº once it has been changed.
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