Special features menu
Setting up your OPTi
Your OPTi has been delivered with “Brix” in scale position A (
S.A.01
). For many applications this is enough to start working straight out of the box.
When first switching on, the instrument will briefly display the scale loaded to
each channel. As there is only one scale active, the initial display will be:
Opti
>>
S.A.01
To overwrite and/or load other scales in A, B and C, the instrument’s special features menu must be accessed. Once loaded, the scale list on start-up
will expand to show the active scales:
Opti
>>
S.A.01
>>
s.b.34
>>
s.c.22
Please note that some distributors may pre-configure your OPTi so that the scales you require are correctly installed. If so, please skip this initial
process.
Accessing the special features menu
To access the special features menu:
1. Switch on the OPTi
2. Press and hold READ until -
OFF
- is displayed
3. Whilst
-Off-
is still displayed, quickly release
READ and press and release ZERO
Navigate through the menu and configure the instrument using the ZERO
and READ keys.
• ZERO = Step through the menu
• READ = Enter a function
• ZERO = Step though the function options
(if applicable)
• READ = Set the option and exit the feature
Display Feature
Access
Actions
-Ag.t-
AG Test Mode
Open
Press READ to switch on AG Test Mode
The instrument will enter the AG Test Mode
Switch the instrument OFF to exit the AG Test Mode
-s.a.-
Scale A
Open or PIN
Press ZERO to step through the list and find a scale
Press READ to set and return to the menu
-s..b.-
Scale B
-sc..-
Scale C
-t.Sc-
Temperature display
Open or PIN
Press ZERO to step through °F or °C
Press READ to set and return to the menu
-dLy-
Delay before Read/
Zero
Open or PIN
Press ZERO to step through 0 to 60 in 5-second intervals
Press READ to set and return to the menu
-Pin-
Set /Remove PIN
protection
Openor PIN
To set your PIN:
1. Press ZERO to increment the flashing digit
2. Press READ to select the number and move to the next digit
3. Repeat to confirm
4. If correct then
-set-
is displayed
5. The instrument will leave the menu
To remove PIN protection:
1. Enter the previously set PIN (see steps 1 and 2 above)
2. If the entered PIN is correct
PASS
is displayed and
the PIN is removed
3. The instrument will return to the menu
-Uer-
Version
Open
View software version and serial number
-End-
Save/Exit
Open
Save settings and leave the menu
This instrument has been calibrated and checked for precision at 20°C.
Analytical Grade Water
1
and AG Calibration Fluids
2
were employed to check the accuracy of the instrument for the primary scales. All other scales are
assumed as correct as their results are calculated emperically from these values.
Sample Type
Certified Value (Brix/RI)
Acceptance Limits
Analytical Grade Water
0.00 / 1.33299
±0.2 Brix / ±0.0003 RI
AG30 Fluid
30.00 / 1.38115
AG50 Fluid
50.00 / 1.42009
Certificate of verification
All materials used to verify the performance of this OPTi refractometer were callibrated by Bellingham & Stanley Ltd., UKAS accredited calibration laboratory no. 0834, accredited to ISO/
IEC 17025:2017.
1. Refractive index values for Water are obtained from "Revised Formulation for the Refractive Index of Water and Steam as a Function of Wavelength, Temperature and Density", adopted
by the International Association for the Properties of Water and Steam (IAPWS) and available as part of NIST Standard Reference Database 10. Refractive indices calculated from the
formulation are absolute refractive indices; conversion to refractive index against air requires division by the respective absolute refractive index of air (NIST Engineering Metrology
Toolbox).
2. AG calibration fluids are prepared by mixing water with a soluble chemical of higher refractive index. The Brix value of the fluid is determined using a high accuracy digital
refractometer at 20.0°C, which has been calibrated with a NIST traceable sucrose calibration standard of Brix value equal to the target value for the AG fluid according to a Laboratory
Procedure
QL-103. The AG fluid composition is finely adjusted to give a measured value to within ± 0.01 Brix (± 0.00002 RI) at 20.0°C.
