OptiMelt Automated Melting Point System - Stanford Research ...

Chapter 4 Maintenance and Calibration 75Figure 39. Align camera.5. A confirmation window immediately pops up with three choices: (1) press Calibrateto confirm your choice and update the camera alignment information, (2) pressFactory to revert to the original factory calibration of the instrument or (3) pressCancel to abort the calibration procedure without any changes.Replacement of Faulty LEDsInternal lighting of the heating block is provided by high brightness white LEDs withexpected lifetimes in excess of 50,000 hours. This is a significant improvement overtraditional incandescent light bulbs which usually have lifetimes well below 5,000 hoursand are sensitive to shock or vibrations.In the case of a fault, the LEDs must be replaced at the factory. Contact your localrepresentative for service information.Broken CapillariesCleaningAll broken capillaries and capillary pieces need to be removed from the heating block.Wait for the heating block to cool down before touching it! Remove the topceramic spacer carefully and carefully extract any capillary pieces left behind. If moredebris remains, remove the block from its compartment to clean the internal slots. Loosenthe two thumbscrews securing its base to the bottom of the box and pull on the blockassembly to bring it out of the box. Slide the front window out to expose the sample slots.Remove any broken glass pieces and spilled chemicals. Use a thin cotton swab or pipecleaner, dipped in alcohol or similar solvent, to clean the capillary slots if necessary(careful to not drip solvent on the exterior paint). Air dry the block before inserting itback into the box. Tighten the thumbscrews to assure proper optical alignment of thesamples relative to the camera. Perform a camera alignment procedure (see earlier in thischapter) after each block cleaning procedure. Unless the block is completely replaced,there is no need for an Acceptability Test at this time.The housing of your OptiMelt system is coated with paint and should only be cleanedwith a rag moistened in soapy solution. Do not use halogenated solvents, acetoneor any similar solvents to clean the magnifying lens!OptiMelt Automated Melting Point System