Starr Instruments DBR-1 Operation Manual

DBR-1 Digital Optical Refractometer
Operation manual
Introduction
Thank you for purchasing Starr Instruments product, 'Digital Optical
Refractometer, DBR-1'. The measurement range for DBR-1 is
0.0%~50.0%. Before using your DBR-1, please read this instruction
manual carefully and understand how to use it safely.
Names and Roles of Each Part
(1) Liquid Crystal Display (LCD)
Measurement values (Brix (%)), zero setting reminder indicator and
battery power indicator are displayed on the Liquid Crystal Display.
(2) ANALYSIS (ON/OFF) key
Press this key to start measurement. (Please note that the
measurement value goes off, if this switch is kept pressed for over 2
seconds.
(3) Sample Stage
The prism is located at the center of the Sample Stage.
The sample stage is made of stainless steel.
(4) ZERO key
Press this Key to start a zero setting for the Unit.
(5) String Holder
A strap can be attached here.
(6) Battery Case Cover (on the back of the device)
Remove this cover to install or replace the batteries.
Warning & Caution
1. Do NOT expose the instrument to extreme temperature or sun
light for a long time, to avoid LCD losing effectiveness.
2. Because this is a precision instrument, it is prohibited from violent
shock.
3. To avoid damage, do NOT disassemble and assemble the
instrument or change the inner circuit and parts.
4. To get accurate result, please perform zero setting according to
section "2. Zero Setting" of this manual.
5. Make sure to clean the prism surface and window of Sample
Stage before and after each measurement.
6. To avoid inaccuracy caused by evaporation, please be sure to
perform a measurement immediately right after dripping solution in
the window of Sample Stage.
7. If you see the low battery symbol "
measurement and please replace batteries. Measurements under
low power may cause unstable results.
8. Do NOT use it under the direct light (as sunlight, lamp, or etc.
9. Do NOT use the instrument in the humid and corrosive
environment.
10. Avoid liquid leaking into the battery compartment, when
changing batteries.
11. During flight transportation, please remove batteries and store
them in the storage case provided.
Confirmation of Package
Please check if your package contains the following components.
● Refractometer DBR-1..........................1 unit
● AAA alkaline battery.............................2 units
● Instruction Manual ...............................1 unit
● Inspection Card....................................1 unit
(5) String Holder
", please do not make a
1. Battery Installation
(1) Remove the battery case cover with a coin or a screw driver. Insert
two AAA alkaline batteries. Be sure the positive and negative terminals
of the batteries is placed properly. (Fig, 1-1).
(2) Screw back the battery case cover and tighten it until the marking
in the center of the cover in line with the main body. Using a coin or a
screw driver, tighten the battery case cover by turning it clockwise (Fig,
1-2, 1-3).
Fig, 1-1
Fig, 1-2
[CAUTION]
● An O-ring is attached to the battery case cover. Ensure that the
O-ring is clean and not deformed at all times. Dirty or deformed O-rings
may allow water to enter the unit and damage the electronic
components inside.
● When the battery power indicator displays "
the batteries with the new ones immediately. Please do NOT mix an old
and a new battery. Use 1.5V alkaline AAA battery only.
● When installing batteries, be sure to check the expiration date.
● After changing batteries be sure to conduct zero setting.
2. Zero Setting
[CAUTION]
● Be sure to perform zero setting each day before using the DBR-1 to
make sure its accuracy. If DBR-1 is not carried out with zero setting
properly, a zero setting indicator will appear as reminder. (Fig 2-1)
● If the temperature of distilled or tap water used for conducting zero
setting (when placed on the prism) is higher or
lower than the ambient temperature, before
pressing the ANALYSIS key, please hold the
sample for few minutes to allow temperature
equilibration before pressing the ANALYSIS key.
(1) Prepare distilled or tap water.
(2) Clean the prism surface (Fig 2-2)
(3) Place approximately 0.3ml of water onto the
sample stage (Fig, 2-3, Fig, 2-4)
(4) Press the ANALYSIS key, the Brix(%) value
will be displayed on the screen after the bar
indication on the LCD display blinks 1 times.
(5) If the display indicates 000, Zero setting has
been successfully completed. Please go to step
9 of this section.
(6) (6) If the display does not indicate 0.0%,
please follow below steps.
(7) Press the ZERO key while the water is still
on the Sample Stage(Fig, 2.5). If the screen
shows "000", it indicates the zero setting is
completed. Please go to step (9).
(8) If the screen does not show "000" but it
shows "LLL", it indicates sample water is not
enough. Please add water onto the sample
stage and follow step (7).
(9) When zero setting is successfully
completed(Fig, 2.6), the DBR-1 is ready for the
measurement. Please wipe off the sample
stage with a dry tissue and refer to Section 3 to
take a measurement".
Fig, 2-4 Fig, 2-5
OPEN
CLOSE
Fig, 1-3
", please replace
Fig, 2-1
Fig, 2-2
Fig, 2-3
Fig, 2-6