THE ELECTRON MACHINE CORPORATION DSA E-Scan, Operating And Service Manual

Page 1: ...olids Analyzer Refractometer Designed and Manufactured by THE ELECTRON MACHINE CORPORATION 15824 CR 450 West 352 669 3101 Post Office Box 2349 FAX 352 669 1373 Umatilla FL 32784 2349 E Mail sales electronmachine com http www electronmachine com cav09 09 ...

Page 2: ......

Page 3: ...fore leaving the factory and should not need re calibration Calibration procedures are available to change system parameters and allow the refractometer to measure different sample fluids if so desired Extensive literature is available for various industries listing the correlation between refractive index Brix or solids and specific process parameters Please contact the service department for mor...

Page 4: ...is at the top of each page for quick reference through the manual Important points reminders and warning messages are printed in bordered boxes as This is a general use manual Additional information is available for specific applications NOTE Box indicates important messages ...

Page 5: ... 1 6 Interface for External Connections 2 3 2 1 7 Power supply 2 4 2 1 8 Electronics Card 2 5 2 2 Refractometer Specifications 2 6 3 Operation 3 1 3 1 The User Interface 3 1 3 1 1 The Sample Chamber 3 1 3 1 2 Button Touch Pad Function Chart 3 2 3 2 Set Up 3 3 3 3 Normal Mode 3 3 3 4 Menu Selections 3 4 3 4 1 Heater Control 3 4 3 4 2 Single Point Calibration 3 5 3 4 3 Measurement Offset 3 5 3 4 4 M...

Page 6: ...n 3 9 3 4 18 Test Mode 3 9 3 4 19 Password Entry 3 9 3 5 External Communications 3 10 3 5 1 Serial Ports 3 10 3 5 1 1 Comm 1 3 11 3 5 1 2 Comm 2 3 11 3 5 2 Parallel Port 3 13 4 Servicing 4 1 4 1 EMC Warranty 4 1 4 2 Return of Defective Parts 4 1 4 3 Technical Assistance 4 1 4 5 Preventive Maintenance 4 1 ...

Page 7: ... connector should be plugged into the power connector located on the bottom right side of the console 1 3 Interconnection The DSA E Scan offers some options for external device connections to satisfy a wide range of requirements The data access cover located on the bottom left side can be used to bring wires and cables into and out of the instrument The bottom cover will need to be removed to conn...

Page 8: ...be re installed and the integrity of the seal should be verified before operating the instrument Please refer to the Operation section for more information 1 3 4 Optional Temperature Controlled Coolant Circulation If a precision reading of a sample at ambient temperature or below is desired a temperature controlled external coolant source will need to be connected to the fittings located on the le...

Page 9: ...DSA E SCAN INSTALLATION 1 3 1 4 Outline Drawing ...

Page 10: ...DSA E SCAN INSTALLATION 1 4 N O T E S ...

Page 11: ...1 Optics Light energy radiating from a light emitting diode LED passes through the prism surface and reflects off mirror 1 to the prism to sample interface The energy reaching this interface intersects at angles chosen to include critical angle for the sample being measured The light intersecting at an angle greater than critical angle is refracted into the solution Light intersecting at less than...

Page 12: ...intervals and stores an electrical charge which reflects the measured intensity The measured intensity is then converted to a digital value using a high speed analog to digital converter The processor manipulates the digital value using the appropriate calculations for the measurement scale chosen based on the calibration of the instrument Thus the DSA E Scan s signal is completely digital allowin...

Page 13: ...al resistance 2 1 5 Cable Entry The DSA E Scan has a data access port to allow data communications with external peripherals The cover should be installed at all times to prevent liquid intrusion The supplied gaskets should be used with any wires or cables securely sandwiched between the gaskets and the data access cover using the supplied hardware The integrity of the seal should be verified on a...

Page 14: ...er connector on the enclosure The power supply accepts inputs from 90 265VAC and 47 63Hz Both American and European power cords are available to connect to the power supply s IEC 320 2P AC receptacle The device has safety approvals from UL cUL TUV Tmark Nemco and CE for worldwide acceptance NOTE Only the power supply provided with the DSA E Scan should be used DO NOT USE any other power supply as ...

Page 15: ...nt printed circuit cards with components on both sides The following diagramg shows the layout of major components integrated circuits switches and connections DSA Electronics Cards Component Identification Power Connector Other Side Reset Switch Parallel Port Comm 2 Serial Port Comm 1 Serial Port Heater Backlight 0 5V Analog Outputs ...

Page 16: ... line LCD w LED backlight Calibration 1 329 1 539 see calibration print out for individual units Sample chamber materials 316 SS synthetic Sapphire sealed with chemical resistant epoxy and Peak materials Outputs 0 5VDC Measurement Temperature 9600 Baud Serial Parallel Printer The precision and accuracy of refractive index measurements is dependent on operator skill the environment temperature cont...

Page 17: ... measurement It is important that the sample covers the prism for an accurate reading The lid should be kept in the closed position to prevent light contamination when reading a sample The sample chamber should be kept clean when not in use The sample may be removed with a paper towel and the prism cleaned with water methanol or alcohol depending on the application Dry with a clean cloth or paper ...

Page 18: ...is prompted Left allows changing between displayed units of measurement in normal mode Scrolls cursor horizontally to the left when user input is prompted Enter accepts information displayed for user input Menu allows user to change the operating mode by adjusting various parameters Read prompts the instrument to display an average of the current measurement over the time period specified in the s...

Page 19: ...t of time after the time set by the read delay adjustment has completed Please refer to the Menu Selections section on Sample Time and Read Delay for more information After the reading has been completed the instrument will display the result until another key is pressed Pressing READ at this time takes another reading while pressing the SEND key sends the held value to the output Pressing any oth...

Page 20: ...ture a heater at the base of the sample chamber will be activated The temperature will then be maintained automatically This is a useful feature when measuring thick liquids that solidify at room temperature such as concentrated black liquor When the temperature set point is below 10 C the heater is turned completely off regardless of the current temperature of the sample chamber Use the RIGHT and...

Page 21: ... or degrees brix percent solids or specific gravity value must be known for the Measurement Offset option 3 4 3 Measurement Offset The measurement offset is used to mathematically shift the current reading It is entered in units of degress brix percent soids or specific gravity depending on which solution type is in use Measurement offset can also be calculated automatically by the Dissolved Solid...

Page 22: ... the instrument s calibration and is only for adjusting the scale of the temperature output 3 4 8 Backlight Adjustment This parameter allows the user to adjust the intensity of the backlit display from completely off to full on Use the RIGHT and LEFT arrows to increase and decrease the intensity A bar graph on the display shows the relative level Press the ENTER button to store the setting 3 4 9 C...

Page 23: ...s to select either of these applications If a product other than these is desired select either Custom Solution Solids or Custom Solution Specific Gravity and proceed to the Custom Calibration menu to set up the appropriate calibration The stored data in the sucrose and black liquor calibration uses the ICUMSA table for temperature compensation through 40 C Temperature compensation data above 40 C...

Page 24: ...e custom solution selection of the solution type menu This allows for an application other than black liquor or sucrose to be calibrated for and measured with the instrument For maximum precision the instrument should be connected to an external temperature controlled coolant circulation source to help stabilize the sample chamber to a constant temperature usually 20 C Starting with the low sample...

Page 25: ...f the 8V power source used to drive the display backlight 3 3V Voltage of the 3 3V power source used to power some integrated circuits Vcc Voltage of the 5V power source used to power some integrated circuits 5 0V Pre regulated 5V source Pdark Average level of defined dark pixels detected on the linear array CCD array Pmin Average level of minimum CCD output pixels detecting light on the CCD array...

Page 26: ...ation on connecting to these ports 3 5 1 Serial Ports The two serial port connections are located on the electronics card at J5 and J1 Comm 1 uses the J5 connector and operates in conjunction with the SEND button to transmit a sample reading to a serial receiver such as a dumb terminal or serial printer Comm 2 uses the J1 connector and is used for communication with an external computer Through Co...

Page 27: ...ransmits current analog measurement low value TAMH transmits current analog measurement high value TATL transmits current analog temperature low value TATH transmits current analog temperature high value TMUN transmits current measurement units THSP transmits current heater set point TCTC transmits current custom temperature compensation coefficient TTIM transmits current system time TDTE transmit...

Page 28: ...n coefficient RTIM followed by 12 34 in 24 hour format receives time information RDTE followed by 12 31 56 in Month Day Year format receives date information RSRT followed by 0 for 2 seconds 1 for 5 seconds 2 for 10 seconds and 3 for 20 seconds receives sample time value RSOL followed by 0 for sucrose 1 for black liquor and 2 for custom receives solution type information RTOS followed by 123 in C ...

Page 29: ... 02 BRIX 01 37 TEMP 26 6C 079 9F A form feed signal is sent after 15 transmissions Thus the printer will only print the information after the SEND button has been pressed 15 consecutive times Then all 15 transmissions will be printed on a single sheet of paper For the printer to print the sent information sooner than that the form feed button on the printer will need to be pressed Refer to your pr...

Page 30: ...DSA E SCAN OPERATION 3 14 N O T E S ...

Page 31: ... Parts No return authorization is necessary Pack defective parts carefully to avoid damage in transit The shipper will be liable if in the opinion of the carrier insufficient packing was used Attach a letter stating the nature of the difficulty encountered the reason for failure if known the date of delivery of original equipment and the approximate number of hours of operation All return shipment...

Page 32: ...DSA E SCAN SERVICING 4 2 N O T E S ...