Vernier Software and Technology
Vernier Software & Technology
Tech Info Library

Chemical Polarimeter Troubleshooting and FAQs

Polarimeter (Chemical), order code CHEM-POL, $499
Specifications and User Guide

TROUBLESHOOTING
- Primary Test:
Make sure you are using a current version of the software.
Software Requirements:
Logger Pro: 3.8.5 or newer
LabQuest App: 1.6 or newer

Connect the two Vernier Polarimeter cables to their respective ports on your Vernier interface. Start the data-collection program and choose New from the File menu. NOTE: In Logger Pro, wait until a graph of Illumination (rel) on the y-axis and Angle on the x-axis appears before continuing. Start data collection and rotate the analyzer, a cosine squared wave should appear on the graph and both the illumination and angle readings should change.

**If you are using a LabPro interface, please refer to these additional instructions:
TIL 2597: I'm using a LabPro as my data collection interface for the Chemical Polarimeter. Do I need to follow any special instructions?

RELATED TIL ENTRIES
TIL 2595: What is the sample volume required by your Chemical Polarimeter?
TIL 2596: What does the illumination value on the Chemical Polarimeter mean and what are its units?
TIL 2597: I'm using a LabPro as my data collection interface for the Chemical Polarimeter. Do I need to follow any special instructions?
TIL 2598: Do you have experiments written for the Chemical Polarimeter?
TIL 4290: I'm not getting accurate results with the Chemical Polarimeter (CHEM-POL).

SPECIFICATIONS
- Encoder Resolution: 0.25 degrees
- Accuracy (optical rotation measurements): +/-1 degree
- Sensitivity: typically up to OD 2
- Optical Encoder: Bidirectional, quadrature encoder, 360 cycle per revolution
- Light Source: LED
- Wavelength (nominal): 589 nm

CALIBRATION
Because you are taking relative measurements of angle, you should perform a new calibration each time you use the Polarimeter. See the user guide for details.

RELATED VERNIER PRODUCTS
Chemical Polarimeter Accessory Cells, order code CELLS-POL, $66

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