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Twilight Tobias IQ150 Instruction Manual

Computing portable reflection densitometers
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Densitómetro IQ150, Tobbias
TB-IQ150

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Summary of Contents for Twilight Tobias IQ150

  • Page 1 Densitómetro IQ150, Tobbias TB-IQ150...
  • Page 2 IQ 150 COMPUTING PORTABLE REFLECTION DENSITOMETERS Instruction Manual MEASUREMENT FUNCTIONS: MEASUREMENT FUNCTIONS: IQ150 Densitometer IQ200 Densitometer 0Density Density 0 0Density Difference Density Difference 0Dot Area Dot Area 0Dot Gain Dot Gain Trap Hue Error Grayness Contrast...
  • Page 4 IQ 150 COMPUTING PORTABLE REFLECTION DENSITOMETERS Instruction Manual S0172/004.19 50 Industrial Drive Ivyland, PA 18974-0347 USA Phone: 215-322-1500 Toll-free: 800-877-3367 Fax: 215-322-1504 E -mail: repair@ tobiasinc.com...

  • Page 6: Table Of Contents

    ABLE OF ONTENTS Introduction ........1 MENU 1 Density [DENS] (IQ150 & 200) ....2 Density Difference [DIFF] (IQ150 & 200) ..3 Setup [SETUP] (IQ150 & 200) ....4 Print/Transmit Function (IQ150 & 200) ..6 MENU 2 Dot Area [AREA] (IQ150 &...

  • Page 8: Introduction

    Introduction The Tobias IQ is a portable, computing reflection densitometer. Density readings are displayed on a large, easy-to-read LCD screen, which displays a prompt line and a legend controlled by soft keys. There are three available menus, which are selected by the [MENU] key. Each menu offers several measurement functions operated by the three soft keys.
  • Page 9 2. Density [DEN] (IQ150 & 200) 1. Press [MENU] until "MENU1" is To enter Density mode displayed. 2. Press [DEN]. 1. Be sure "AB" is on the prompt line. If To read Absolute Density not, press [ABS]. This mode does not compensate for the paper density.

  • Page 10: Density Difference

    3. Density Difference [DIFF] (IQ150 & 200) This function allows you to set a standard house reference density value for each color and measure the differences from them across the sheet. 1. Press [MENU] until "MENU1" is To enter Density displayed.

  • Page 11: Setup [Setup]

    4. Setup [SETUP] (IQ150 & 200) 1. Press [MENU] until "MENU1" is To enter Setup mode displayed. 2. Press [SETUP]. 1. Press [CAL] key. To calibrate the unit 2. Follow prompts and read ZERO and CAL patches on the reflection standard. 3.

  • Page 12: Menu

    1. Press [SETUP], then [DFLT]. To reset the unit to factory 2. To reset, press [DFLT] again to save or default values press either [EXIT] key to abort. 3. Values reset automatically; press [MENU] to proceed. 4. The unit automatically switches to calibration plaque setup mode;...
  • Page 13 Print/Transmit Function (IQ150 & 200) The data obtained from the IQ can be transmitted to a serial printer or computer either manually by pressing the [PRINT] key or automatically after a reading is taken. 1. Press [MENU] until "MENU1" is To enter Print/Transmit displayed.

  • Page 14: Menu

    Dot Area [MENU2] (IQ150 & 200) 1. Press [MENU] until “MENU2” is To enter Dot Area mode displayed. 2. Press [AREA]. 1. If unit is in the Murray-Davies mode, To use Murray-Davies "M/D" is displayed. equation 2. To change base value, press [BASE] and read the base.
  • Page 15 Dot Gain [GAIN] (IQ150 & 200) Dot gain, as a percentage, is calculated as measured dot area minus the reference value. 1. Press [MENU] until "MENU2" is To enter Dot Gain mode displayed. 2. Press [GAIN]. 1. Select 25%, 40%, 50%, 75% or 80% by To cycle through the reference values pressing [REF] repeatedly.
  • Page 16 Trap [TRAP] (IQ200 only) 1. Press [MENU] until "MENU2" is To enter Trap mode displayed. 2. Press [TRAP]. 1. Read the first down color sample. To read the Trap value 2. Read the second down color sample. 3. Read the overprint sample. 4.

  • Page 17: Hue Error [Hue]

    Hue Error [HUE] (IQ200 only) 1. Press [MENU] until "MENU3" is To enter Hue Error mode displayed. 2. Press [HUE]. 1. Read the sample. To determine Hue Error 2. The three color densities will be displayed along with the hue error, expressed as a percentage.
  • Page 18 Grayness [GRAY] (IQ200 only) 1. Press [MENU] until "MENU3" is To enter Grayness mode displayed. 2. Press [GRAY]. 1. Press [BASE]. To change the base value 2. The next reading becomes the new base. Each channel maintains its own base value.

  • Page 19: Print Contrast

    Print Contrast [CONT] (IQ200 only) 1. Press [MENU] until "MENU3" is To enter Contrast mode displayed. 2. Press [CONT]. 1. Read the solid patch. To determine Contrast 2. Read a 75% tint patch. 3. Its density will appear briefly, then the printing contrast.
  • Page 20 Frequently asked questions Why won’t the lamp light? Usually caused by loss of calibration, or misuse and resulting in misalignment of base plate. The lamp itself is usually OK. IQ units have error checking in the software. When an error is detected, the lamp driver is turned off, and remains off until the error is corrected.

  • Page 21: Source Lamp Replacement

    Source Lamp Replacement 1. To verify that the source lamp needs replacing, perform the test described on page 4, under Setup. 2. Close and latch the unit shut and wait for the unit to turn off. 3. Turn the unit over and remove the two Phillips head screws in the front of the unit and the two black Phillips head screws on the rear panel.

  • Page 22: Battery Pack Replacement

    Battery Pack Replacement 1. The IQ uses rechargeable NiCad batteries. NOTE: Batteries do NOT need to be fully discharged. Tobias has run the batteries on a conditioner prior to shipment. (See Step 8 below). Fourteen hours are required to fully charge the unit. 2.

  • Page 23: Error Messages

    Error Messages Recalibrate unit; perform [DFLT]. Density Out of Range Appears whenever the unit is taking a Incomplete Reading reading and the unit is not held down long enough for the reading to stabilize. Shows that the batteries have discharged to Low Battery such a point that the unit will not perform properly.
  • Page 24 The message will be followed by a number Unable To Calibrate Unit from 1 to 5. For 1 or 3: Check the calibration plaque values. The values displayed for the CAL and ZERO swatches must match the values of the CAL plaque. For 2 or 4: There is mechanical damage or an electronic problem;...
  • Page 25 Unit Dead Reset IQ by pressing switch at rear of unit through small hole on center of back panel, then recharge. On older models without the reset hole, unplug battery pack for five minutes, plug back in, then recharge at least 14 hours.

  • Page 26: Specifications

    Specifications Electronics ......... Microprocessor Controlled Optical Design........ANSI PH 2.17 Status "T" Measurement Range ......0.00 to 2.50 Density Accuracy ..........±0.02 Precision ..........±0.01 Display..........Supertwist Liquid Crystal (32 x 80 dot matrix) Serial I/O Baud Rate........300 to 19,200 baud (user programmable) Data Format ........

  • Page 27: Appendix: Rs-232 Primer

    Appendix: RS-232 Primer Printers are usually equipped with either a RS-232 serial interface or a parallel interface. The IQ is designed to work with printers equipped with an RS-232 interface. RS-232 is an Electronics Industries Association (EIA) recommended standard for connecting computer devices together to exchange information (data).
  • Page 28 With hardware handshaking, one of the RS-232 lines is turned off whenever the receiving unit cannot accept data. The unit stops sending data until the line is turned on again. With software handshaking, the receiving unit sends an ASCII code back to the transmitting unit when it cannot accept any more data.

  • Page 29: Connections To A Computer

    Connections to a Computer The RS-232 output of the IQ may be connected to a computer so that the data can be saved in a disk file or manipulated by a program on the computer. To connect the IQ to a computer, a cable that provides each of the devices with the appropriate signals they need to operate correctly must be used.
  • Page 30 Slope Calibration for the IQ150 & IQ200 Densitometers The SLOPE mode can bias the calibration of the IQ150 or IQ200 so that the displayed density will match that of another densitometer. Densitometers from different manufacturers have differing optical characteristics; therefore they do not always display the same density values across their full operating range.
  • Page 31 After a channel has been sloped with a value other that 1.000, a delta or triangle symbol will be displayed after its density whenever any reading is performed. REMINDER NOTE: Unit must be calibrated to the (cleaned) part number A2088 plaque prior to this slope procedure. Slope is NOT done with the plaque.
  • Page 33 50 Industrial Drive Ivyland, PA 18974-0347 USA Phone: 215-322-1500 Toll-free: 800-877-3367 Fax: 215-322-1504 E -mail: repair@ tobiasinc.com...

This manual is also suitable for:

Tobias iq200

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