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Spectral Products CM110 Manual

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Digikröm
CM110/CM112
Monochromator
February 07 2014
1
Spectral Products
2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705
www.spectralproducts.com

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Piotr Kwiek
April 6, 2025

Can the CM112 monochromator work in a vertical position?

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Summary of Contents for Spectral Products CM110

  • Page 1 Digikröm CM110/CM112 Monochromator February 07 2014 Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 2: Table Of Contents

    Optical Bench Mounting ......................33 CM110 Dimensions ......................... 34 Optical Path Design ......................... 35 J Reference CM110/CM112 Interface Pin Layout ..............36 K Reference Serial Relay Command ..................37 L..CM110/112 .Exit and Entrance flange ................38 M CM Series Grating Addition Using VB Software…………………………………………39 Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705...

  • Page 3: Introduction

    Spectral Products, will void any written or implicit warranty. Spectral Products reserves the right, without prior or further notice, to make changes to any of its products described or referred to herein to improve reliability, function, or design.

  • Page 4: Theory Of Operation

    The wavelength that is passed by the monochromator, lambda, is described by the grating equation that was presented earlier. n *  [nm] = 2 * d * COS() * SIN() Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 5: Getting Started

    Digikröm CM110/112, labeled POWER. Lock it in place. Plug the power cord into your wall or power strip outlet. The CM110/112 will reset and find home position. The RS232 connection requires a cable with a DB9-M subminiature connector at the monochromator, and a computer communications port connector as appropriate for the user.

  • Page 6: Baud Rate

    The Digikröm CM110/112 is factory configured and the character length, number of stop bits and parity cannot be changed. Its signal levels and format are the same as those that are specified for the RS-232. The CM110/112 emulates data communications equipment (DCE).

  • Page 7: Operation

    <High Byte> <Low Byte> CM110/112 Action: If ( 256 * <High Byte> ) + <Low Byte> is a valid position, then the scale factor used in determining position will be recalibrated to make the current position agree with the input position. The gratings return to zero after completion.
  • Page 8 From CM110/112: <Status Byte> CM110/112 Action: If valid, moves to the zero order position of the selected grating. Rotation of the grating thereafter will be clockwise if the order byte was 01, and counter-clockwise if the order byte was 254.
  • Page 9 From CM110/112: <Status Byte> CM110/112 Action: Sets CTS low, and moves below (above) the starting value. Sets CTS high and accelerates to scanning speed. Sets CTS low when the Start is reached. Sets CTS high again as END is passed.
  • Page 10 <Status Byte> CM110/112 Action: No immediate action. If the Size Byte is less than or equal to 127 (i.e., the most significant bit = 0), a subsequent STEP command will increase the position by that number of units. If the Size Byte is greater than 127 (most significant bit = 1), then a subsequent STEP command will decrease the position by that number of units.
  • Page 11 From CM110/112: <Status byte> CM110/112 Action: If units byte is valid, the CM110/112 will move to the zero order position. The specified units will be used in subsequent commands. Note: Each grating may have a different type of unit specified.

  • Page 12: Hand Held Controller Dk1201 (Optional)

    Digikröm CM110/112 Connect the controller RS232 cable to the rear of the CM110/112. Connect the other end of the dual power cable to the power jack on the CM110/112. The CM110/112 will find home position and the control unit display will read:...
  • Page 13 SCAN This command selects the speed at which the CM110/112 will scan the intensity of light at the exit slit for a SPEED given wavelength range. The user should refer to Appendix B, page 21 for a list of scan speeds that are appropriate for various gratings.
  • Page 14 Now, enter the ending wavelength and press ENTER. Note: once the scan is started it cannot be stopped unless power is disconnected. After the ending wavelength value is entered, the CM110/112 will go to the START position at maximum speed. The CM110/112 will begin scanning, while the display reads: ENTER=scan CNCL=quit CURRENT =xxxxx...
  • Page 15 In response to ENTER under the “Calibrate Wavelength” menu, the display will read: # - select CNCL=quit STEP SIZE:xxxxx =xxxxx 5-size 3=step+ 9=step- Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 16 OLD WAVELENGTH:xxxxx NEW WAVELENGTH:_ Pressing the ENTER will accept the value and pressing CANCEL will exit without changing old value. In response to ENTER under the “Change zero offset” menu, the display will read: CM110 CM112 ENTER=zero CNCL=quit ENTER=zero CNCL=quit...
  • Page 17 Pressing ENTER displays: CM110 CM112 ENTER=zero CNCL=quit ENTER=zero CNCL=quit ********ZERO********* ********ZERO********* 3=Inc MACH.2 9=Dec Accept new zero? Accept new zero? Pressing ENTER accepts new zero offset. CANCEL to exit menu without saving the changes. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705...

  • Page 18: Error Screens

    When there is a failure to complete a task, a value of 24 occurs, the following message appears: <24> WAS NOT RECEIVED HIT ANY KEY TO CONT. The CM110/112 must be turned off and then back on to recover from this error INVALID KEY Whenever an invalid key is pressed the following message appears: Invalid key……………….

  • Page 19: Queries

    “calibration” wavelength. Displays the number of motor steps required to Cal Offset M1G2 move grating #2 from zero order to a specified “calibration” wavelength.. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 20: Option Commands

    STEP This command allows the user to recalibrate to a MANUAL=nxt CNCL=quit zero wavelength or a nonzero wavelength. ENTER=select Change zero offset INC/DEC Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 21: Appendices

    Diffraction Limit to Resolution The grating used in a CM110/112 is a reflective surface with a series of vertical parallel grooves. Collimated light is directed toward the grating, which in turn diffracts the light into component wavelengths. A slight rotation of the grating causes a change in wavelength transmission.
  • Page 22 70 is the maximum grating angle for the CM110/112. The CM110/112 grating drive provides a minimum  of .0075...

  • Page 23: Wavelength Scan/Slew Speeds

    Actual speed = 1000 / 2 = 1000 Å/sec User defines scan speed as 62 Å/sec w/600 g/mm grating Actual speed = 2000 / 2 = 62.5 Å/sec Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 24: Encoding/Decoding Data Bytes

    1000 - (256 x Hibyte) = 1000 - (256 x 3) = 232 Remainder = 232 = Lowbyte Step 4: Send the command. The specifiers are 3 and 232. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 25 Step 1: Use the formula:  Wavelength ( ) = (Hibyte x 256) + Lowbyte (05 x 256) + 106 = 1386 Angstroms Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 26: Status Bytes

    D. Status Bytes Whenever the CM110/112 is given a command, it will respond with a status byte that indicates whether or not the command was accepted. Each bit in the status byte has a meaning, which is given below. When a command is not accepted, some of the bits of the status byte will indicate the reason.

  • Page 27: Novram Program

    <Data Byte><Checksum Byte> From CM110/112: <Status byte> CM110/112 Action: If valid, Data Byte is saved into non-volatile memory at Address Byte. From CM110/112: <24> Valid choices for Address Byte are integer values between 0 and 127, and valid values for Data Byte are integer values between 0 and 255.
  • Page 28 Not used Not used Not used Not used AA in hex if programmed AA in hex if programmed 34 - 127 Not used Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 29: Calibration

    (if the unit were optically and geometrically perfect) and scales it by the calibration factor. Each grating in a multiple-grating machine has its own zero and calibration numbers, compensating for mechanical or optical variations as the gratings are changed. The following are tools and procedures that can be used to calibrate the CM110/112 monochromators.

  • Page 30: Accessories

    The AD131 module does not have the sensitivity of a photomultiplier tube, and is not appropriate for some applications. Spectral Products offers a TE cooled PBS/PBSE photodiodes to extend the useable range of the AD131 module. However, due to high dark currents, this option is considerably less sensitive than alternative detection systems.

  • Page 31: Product Conversions

    CM110/112 is factory assembled with a removable folding mirror in place, unless otherwise requested by the customer. Therefore, the instrument is usually configured for a straight-through optical path. NOTE: only one of the two folding mirrors in the CM110/112 is removable. Before you attempt to remove the mirror, refer to page 28, and follow directions below: The conversion of the monochromator from the straight-through optical configuration to the right angle optical configuration is a six-step process.

  • Page 32: Reference Drawings

    I. Reference Drawings Changing the Optical Path Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 33: Optical Bench Mounting

    Optical Bench Mounting Digikröm CM110-Bottom View Description M6 threads (3) used for attaching the instrument to a optical bench. ¼ - 20 threads (3) used for attaching the instrument to a optical bench. Threaded holes are occupied with set screws to prevent light leaks.

  • Page 34: Cm110 Dimensions

    CM110 Dimensions Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 35: Optical Path Design

    EXIT SLIT FOCUSING MIRROR GRATING FOLDING MIRROR COLLIMATING MIRROR ENTRANCE SLIT Figure 2 Schematic of the “Right Angle” Optical Configuration for the Digikröm CM110 Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 36: J Reference Cm110/Cm112 Interface Pin Layout

    J Reference CM110/CM112 Interface Pin Layout Fig. I-1 CM110 to AT 9 Pin Serial Port Connector, DB25 Female Fig. I-2 CM110 To PC 25-Pin Serial Port Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705...

  • Page 37: K Reference Serial Relay Command

    K Reference Serial Relay Command SERIAL RELAY OPERATION All Spectral Products Instruments with an RS232 interfaces now support a serial relay mode. The serial mode allows multiple instruments to be controlled from one serial port. In the serial relay mode, a daisy-chain cable allows serial messages to be relayed from instrument to instrument. Only one selected instrument will respond to the message.
  • Page 38 L..CM110/112 .Exit and Entrance flange Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

  • Page 39: M Cm Series Grating Addition Using Vb Software

    2. Connect the monochromator to your computer serial port with a standard RS-232 cable. NOTE: Use of a null-modem cable could result in damage to the electronics of the CM110. 3. Open the supplied program CMDEMO-E.exe program. The opening screen...
  • Page 40 Novram drop down menu. Click the Novram Utility menu. Click Read drop down menu, then the Novram tab. The screen should appear as: Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 41 9 and change the value to 600, and then click the Value tab in item 10 and change that value to 1200. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 42 6. Once you have identified the grating to be installed, click the Write, then the Novram menu items. A warning box will appear. Click Continue. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 43 A custom Allen wrench is supplied for adjusting these screws. The grating is secured with a screw and star lock washer. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705...
  • Page 44 633nm laser line, and then the 2 , and 4 order lines. Continue adjusting the tip and tilt until all lines intersect the incoming beam on the collimating mirror. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 45 Press the Continue button to issue the Zero command and store the offset value into memory: Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 46 8. To calibrate the grating, click the Commands, Control, and GoTo menu commands. A second box will appear. Enter the laser wavelength and press OK. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...
  • Page 47 Again, a new box will pop up showing the actual wavelength the monochromator is at presently, and asking what wavelength you would like to calibrate the grating to be: Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705...
  • Page 48 11. The grating will reset. It is a good idea to check several known lines to ensure zero and calibration offsets are good. 12. Remove power from the monochromator. Replace the PCB and monochromator cover. Spectral Products 2659-A Pan American Frwy., NE Albuquerque, NM 87107 Tel (505) 343-9700 Fax (505) 343-9705 www.spectralproducts.com...

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