Cojali jaltest JT3011 Manual De Instrucciones

1. STRUCTURE DIAGRAM
Cover
1
Plate
Prism
2
Assembly
3 Calibration
Screw
Rubber
4
Grip
Focus
5
Adjustment
6
Eyepiece
2. OPERATION INSTRUCTIONS
1. Align the prism assembly (2) with light
and adjust the focus (5) until you can see
the scale clearly.
2. Calibration: Accurate measurement
depends on careful calibration. To
calibrate the refractometer accurately,
firstly you should make sure the ambient
temperature is about 68 °F. It is
recommended to do the calibration in an
air conditioned room in which the
temperature is set at 68°F.
You can use distilled water to calibrate.
Open the cover plate (1), place 2-3 drops of
distilled water on the prism (2), then close
the cover plate and make sure the water
spreads across the prism without air
bubbles or dry spots. Wait for about 30
seconds to let the reading to stabilize.
Look into the eyepiece (6) and turn the
calibration screw (3) with the screw driver
until the reading is "0".
100
1.070 1.070
90
1.060 80 1.060
70
1.050 1.050
60
1.040 1.040
50
1.030 40 1.030
30
1.020 1.020
20
1.010 1.010
10
0
1.000 1.000
d 20 20ºC ‰ d 20 20ºC ‰
20 20
SALINITY SALINITY
Please note: The pictures above are just
for reference, the actual scale may be
different.
3. Clean the prism with soft cloth, and
then place 2-3 drops of the liquid sample
to be tested on the prism. Then close the
cover plate and make sure the sample
spreads across the prism without air
bubbles or dry spots. Wait for about 30
seconds to let the reading stabilize.
Align the prism assembly with the light
source, look into the eyepiece and you
can get the reading.
4. Clean the refractometer with soft cloth
and put it back into the box. Keep the
refractometer dry and clean, that can
make the instrument accurate and
durable.
100
90
80
70
60
50
40
30
20
10
POOR POOR GOOD
0