ATAGO DR-M2 User manual

Multi-wavelength
Abbe Refractometer
Instruction Manual Cat.No.1414
Cat.No.1410
1410-E21
PRODUCT REGISTRATION & WARRANTY CARD
https://www.atago.net/registration/
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Handling of plug
6
Be sure to use the power cable included
with the DR-M2/DR-M4.
If a power cable other than the one included
is used, the rated voltage and polarity of the
power may change, and may cause
smoking or fire.
ۍDo not insert the power plug in an outlet
other than AC100 to 240V.
Inserting the power plug in any other outlet
may result in shortcircuiting the unit,
smoking or fire.
ۍ
Do not use the power cable if damaged or
broken.
If used, fire, electrical shock, or burns may
result.
For a new power cable, contact your ATAGO
distributor.
ۍ
When disconnecting the power cable from
the outlet, make sure to do it by holding the
plug.
If the cable is pulled for disconnection, it may
not only break the cable but also cause fire
and electric shock.
ۍ
When connecting the power cable to a mains
AC outlet, ensure that the ground pin is
connected as well.
ۍ
WARNING
CAUTION

Handling of plug
7
Do not insert or disconnect the power plug
with wet hands.
ۍ
CAUTION
Connection of circulating constant temperature bath
Pay careful attention to hot circulating
water.
ۍFor connecting a circulating constant
temperature bath with the refractometer,
make sure to use the elicon tube 䢪made of
vinyl chloride䢫.
Moreover, tightly fasten each joint part
between the nozzle and tube with the tie
band.
ۍ
If the tube is damaged, replace it with new
one as immediately as possible.
If the damaged tube is continuously used,
the operator may scald himself with hot
circulating water.
ۍ
WARNING
ۍThe temperature of hot water to be
supplied from a circulating constant
temperature bath to this refractometer is
limited to 50䉝, and the flow rate of the
circulating constant temperature bath
should be 10 L/min. at maximum through a
nozzle of 6mm caliber. Too much discharge
not only increases water pressure but also
may cause disconnection between the
nozzle and tube or may overload the water
channel inside the refractometer.

(1) Unpacking
3. Unpacking and setup
● Multi-wavelength Abbe Refractometer DR-M2
12
● Multi-wavelength Abbe Refractometer DR-M4
●
●
●
●
●
●
●
Contact liquid (monobromonaphthalene, 4mL)
(for practicing solid matter measurement)… 1
Lighting glass for film measurement …1
Interference filter, 589nm ……………………… 1
Instructions (this manual)…………………1
Inspection certificate………………………1
●
●
●
●
●
Take the DR-M2/DR-M4 out of the packing case and check to see whether there is any
external damage observed or not.
Make sure that the following things have been contained in the packing case.
①
②
●
●
●
●
●
●
●
Contact liquid (monobromonaphthalene, 4mL)
(for setting reference point) ………………… 1
Contact liquid (nD1.78 , 4mL)
(for practicing solid matter measurement)… 1
Lighting glass for film measurement …1
Interference filter, 589nm …………………1
Instructions (this manual)…………………1
Inspection certificate………………………1
●
●
●
●
●
●
DR-M2 main unit…………………………1
Light source unit…………………………1
AC power cable……………………………1
Light stand…………………………………1
Light guide…………………………………1
Allen wrench for detaching/
attaching prism…………………………1
Test piece (nD1.516) (for practicing solid
matter measurement) ……………………1
DR-M4 main unit…………………………1
Light source unit…………………………1
AC power cable……………………………1
Light stand…………………………………1
Light guide…………………………………1
Allen wrench for detaching/
attaching prism…………………………1
Test piece (nD1.62)
(for setting reference point)………………1

(1) Refractometer (Figures 4-1,4-2 and 4-3)
4. Names and functions of main parts
14
Eyepiece㸸
For observing the boundary line between light and shade 䢪refraction field䢫in the vision. On
observing the eyepiece, turn it to bring the cross hairs into focus. The boundary line cannot be
seen without sample on the prism.
Prism open-shut handle㸸
To open and shut the secondary prism. For opening, turn the handle frontwards and open the
secondary prism by raising the lever on the upper side of the secondary prism.
Main prism㸸
Apply a sample onto the upper surface of the main prism for measurement. Carefully handle the
main prism not to damage it because it is an important part to serve as the basis for
measurement of refractive index.
Secondary prism㸸
Open the secondary prism to apply a sample onto the main prism. The secondary prism is used
for lighting up liquid sample and its surface that contacts sample is frosted to create even light
dispersion.
Power cable connector㸸
To connect the power cable between the refractometer and the light source unit to supply power
from the latter to the former.
Signal cable connector㸸
To connect the signal cable between the refractometer and the light source unit.
Power switch㸸
Press this switch to turn on the refractometer and press it again to turn it off, however, the
refractometer is turned on/off when the light source unit is turned on.
Constant temperature water circulating nozzles㸸
For measuring sample at a constant temperature, these nozzles are used to circulate constant
temperature water around the prism. For connection of the circulating constant temperature bath,
refer to page 22, "䢪3䢫Connection of circulating constant temperature bath".
Near-infrared ray viewer mount㸸
When using the Near-infrared ray viewer, install the mounting adapter to this mount.
Desiccant case㸸
There is a desiccant inside the case. When the desiccant is moistened, the color of the
desiccant changes from green to pale green. If the color has changed, turn the cap of the case
counterclockwise to remove it and replace the desiccant with new one.
For replacement of the desiccant, refer to page 67, "(2) Replacement of desiccant."
Measurement knob㸸
Tu r n this knob to match the boundary line appearing in the refraction field of vision with the
intersection point of the cross hairs. As this knob is turned, the indication of the refractive index
appearing on the display panel continuously changes, and the correct refractive index of the
sample is indicated when the boundary line meets the intersection point of the cross hairs.
Rating label㸸
Ratings and serial number of the refractometer are shown on this label.
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