Rudolph Research Analytical - Autopol 589 & 880 Automatic Saccharimeter
 The AUTOPOL 880 Series Automatic Saccharimeter is a dual wavelength microprocessor based saccharimeter capable of measuring at both 589 nm and 880 nm. The 880 nm ICUMSA Approved near infrared wavelength allows measurement of dark sugar factory juices, while the AUTOPOL Automatic Saccharimeter Purity Mode allows simultaneous measurement and display of PURITY, BRIX and POL.
Rudolph Research Analytical knows Sugar Technologists around the world demand 24 hour operation, 7 days a week for up to 9 months out of the year. They expect 0.02°Z reproducibility and accuracy. Rudolph Research understands these demands and requirements, because Rudolph has been serving the sugar industry since 1940. Throughout those sixty plus years, Rudolph has dedicated itself to manufacturing quality instrumentation and providing superior technical and service support, both directly and through its worldwide dealer network. This dedication is consistent with Rudolph's over 2,000 instruments installed worldwide, with many of those instruments still in operation after 25 years of service. |
| Why choose Rudolph Saccharimeters? |
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Just listen to their customers:
"...how pleased we are with the AUTOPOL instrument here at Lula-Westfield. Its performance has proven to be both reliable and accurate..."
A.H. Newchurch, Jr. Arnel Negranza |
The AUTOPOL 880 provides 0.02 repeatability and accuracy, time proven measurement technology and the critical features necessary for today's sugar analysis. |
Dual Wavelengths
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Dilution and Cell Length Correction
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 The AUTOPOL 589 and 880 have a built in temperature probe to measure the temperature of the sample or quartz plate being measured. The AUTOPOL 589 and 880 display the temperature source and type of correction. Utilising factory programmed temperature coefficients the AUTOPOL saccharimeters can make the following types of temperature corrections:
(1) A 30°C sucrose sample can be measured by the 31T cell sensor and corrected to 20°C or 27.5°C. (2) A 29°C sucrose sample in a Type 14 center fill glass cell can be estimated by the air temperature inside the sample chamber and corrected to 20°C. (3) A Quartz Plate measured at 25°C by the chamber sensor can be automatically corrected to 20°C. |
Automatic Calibration First, place a Rudolph Quartz Control Plate calibration standard on the optical rails and enter the Quartz Plate value in the appropriate window.
Second, enter the temperature to correct the measurement to either the ICUMSA standard temperature of 20°C or the Tropical reference temperature of 27.5°C.
Third, press 2 buttons and calibration is complete. |
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Weight/Weight (Purity Mode)
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Print & Data Transmission Format The printout below is an example of what can be generated by the AUTOPOL 880 Purity Option consumables. This type of printout can be sent to a PC or a printer. The Purity, Saccharimeter and Refractometer measurements can all be accessed and retrieved by a remote PC either by specific key commands or on a time interval basis. Similar printouts can be generated by the AUTOPOL 880 however, these printouts are limited to the following parameters: sample name, tube length multiplier, °Z value, date-time, wavelength, temperature correction, range limits and statistical functions. 
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Definitions The AUTOPOL 880 always displays Purity as if it were reading a 1 normal solution as defined in SPS-1: 3.1 The "normal sugar solution" is defined as 26.0160 g of pure sucrose weighed in vacuo and dissolved in water at 20.00°C to a final volume to 100.000 cm3. This corresponds to 26.000 g weighed in air under normal conditions (1013 mbar, 20°C, 50% relative humidity) and dissolved in water to a final volume of 100.000 cm3 . Therefore, Rudolph displays:%Sucrose: %RDS-OP %PURITY |
ICUMSA Specification and Standard SPS- 1 (1998) Polarimetry and the International Sugar Scale - Official Excerpts from SPS-1 (1998) shown below describe Rudolph's basis for calibrating quartz and its Saccharimeters at 589 nm and 880 nm.7.6 Use of quartz control plates in polarimeters with different wavelengths. As outlined in Section 7.5, a quartz control plate has a sugar value of 100°Z for a particular wavelength, if its rotation is equal to that of the normal sucrose solution at the same wavelength. The numerical values for the wavelengths used in practice are given in 5.4. They are calculated from the value at the basic wavelength of 546.2271 nm using equation (3) for the rotatory dispersion of sucrose solutions. In addition the rotation values of a quartz plate must be known for those wavelengths which are needed for its calibration. Using experimental data by Bunnagel and Oehring and the 22nd Session study 55 the specific rotatory dispersion of a quartz for a wavelength in the range 546 - 900 nm is given by e quation (4). In determining the appropriate quartz plate value for a polarimeter operated at a near infrared wavelength, the wavelength of the particular light source employed needs to be known. [ where: Rudolph calibrates its Quartz at 880 using the above ICUMSA approved method and others upon request. |
The AUTOPOL 589 Series Automatic Saccharimeter provides the same features, measuring speed and accuracy of the AUTOPOL 880 but at the single wavelength of 589 nm.
The most important feature of the AUTOPOL 880 is its ability to measure at two wavelengths: 589 nm and 880 nm (NIR). Select 589 nm for conventional analysis using chemical or lead clarifiers, or select 880 nm for polarimetric sugar measurements in the near infrared (NIR). 880 nm is above the absorption level of most dark sugar factory solutions allowing measurement of filtered but non chemically clarified juices. Using Whatman 91 filter paper, Manville Filter Cel Grade Celite, a 100 mm cell and the proper technique, sugar solutions from crushed cane to molasses and raffinate can be measured. Please refer to our application note 910A. 
Whether your sugar analysis requires a 100 mm or 200 mm cell, whether you use 1/2 normal (13g/100ml), 1/4 normal (6.5g/100ml) or full weight sugar solutions, the AUTOPOL 589 and 880 provide the correct multiplier to display the reading as if the sample were prepared as a 1 normal solution in a 200 mm optical pathlength cell. 
Calibrating the AUTOPOL 589 and 880 is quick and simple.
The AUTOPOL 589 and 880 offer sample specific programs which can be pre-defined for specific juices. This capability is advantageous in factory environments where the same type of samples are repeatedly measured. These programs allow for input parameters such as: multiplier, wavelength, temperature correction to be prespecified. Enter into PURITY MODE and add a refractometer and then dilution on a weight/weight or weight/volume basis can also be prespecified for each sample name. Each program can be labeled with an alphanumeric and assigned to one of the function keys. The factory erator simply presses the preassigned function key to start measurement. 
Add a 
The Purity Mode allows the automatic determination of purity using any weight volume combination possible. The Polarimeter can have one type of dilution and the Refractometer another, either way, the AUTOPOL 880 and AUTOPOL 589 will still provide the correct Purity Value based on a 1 normal solution. 
For sugar manufacturers who prefer to work on a weight/weight (wt/wt) basis or a combination of wt/wt and wt/vol., the Purity Mode's advanced consumables will still provide an accurate Purity determination based on a standard normal solution. 
The AUTOPOL 880 has one centronix parallel port and two serial ports. These ports are configurable in the "I/O Configuration" option of the Setup Menu, allowing simultaneous communication to a Refractometer, printer and a remote PC or central database. 
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| Optical Wavelengths | 589nm, standard | 589nm and 880nm, standard |
| Wavelength Selection | Single wavelength only | Automatic by push-button |
| Measuring Mode | °Z (°ISS), Optical Rotation or User Defined Scale |
°Z (°ISS), Optical Rotation or User Defined Scale |
| Measuring Range | ± 225°Z | ± 225°Z |
| Resolution | 0.01°Z | 0.01°Z |
| Reproducibility | 0.01°Z | 0.01°Z |
| Accuracy | 0.01°Z | 0.01°Z |
| Prism | Glan Thompson calcite quartz | Glan Thompson calcite quartz |
| Temperature Probe Range | 10° - 40°C | 10° - 40°C |
| Temperature Probe Accuracy | ±0.1°C | ±0.1°C |
| Measurement Time | 12° / second | 12° / second |
| Light Source | Tungsten-halogen 6V, 20W Average life: 2,000 hours |
Tungsten-halogen 6V, 20W Average life: 2,000 hours |
| Sample Chamber | Accepts sample tubes up to 200mm | Accepts sample tubes up to 200mm |
| Communication Interface | Two RS232 Ports, one Parallel Printer Port and one auxiliary port | Two RS232 Ports, one Parallel Printer Port and one auxiliary port |
| Calibration | Automatic calibration by push-button | Automatic calibration by push-button |
| Display | 7.5cm x 10cm graphics LCD, 320 x 240 dots cold fluorescent back lit | 7.5cm x 10cm graphics LCD, 320 x 240 dots cold fluorescent back lit |
| User Interface | Touchscreen | Touchscreen |
| Automatic Sensitivity | Measures samples with transmittance as low as 0.01% (up to O.D. 4.0) | Measures samples with transmittance as low as 0.01% (up to O.D. 4.0) |
| Input Power | 100 - 240 Volts, 50/60Hz | 100 - 240 Volts, 50/60Hz |
| Calendar/Clock Functions | Battery-backed clock. Time and date sent to computer and printer | Battery-backed clock. Time and date sent to computer and printer |
| Operating Dimensions | 35"W x 10.5"H x 17"D 890mm W x 267mm H x 432mm D |
35"W x 10.5"H x 17"D 890mm W x 267mm H x 432mm D |
| Shipping Dimensions | 41"W x 25"H x 25"D 1025mm W x 625mm H x 625mm D |
41"W x 25"H x 25"D 1025mm W x 625mm H x 625mm D |
| Operating Weight | 85 lbs (39 kg) | 85 lbs (39 kg) |
| Shipping Weight | 105 lbs (47 kg) | 105 lbs (47 kg) |