User manual - ARS
Contents
1. Note The densitometer and the calibration strip shipped with it belong together Since measuring geometry may defer the calibration strip should not be used to check other densitometers The calibration strip is made of photographic material It should be kept in a dark cool dry and dust free place to protect density values Do not touch reading area with bare hands Soiled reading areas cause incorrect readings especially on high densities 12 Checking the calibration should be done under the following conditions Ambient temperature 20 to 22 Celsius Relative humidity between 0 and 70 Voltage and frequency must be in tolerance to the one indicated on the identification label of the power supply The instrument should be acclimated to ambient conditions and have been connected to the power source for a minimum of 5 minutes before calibrating Use aperture with 3mm diameter TD1 only Position the calibration strip so that the left field 0 00 of it is centred over the light source Reset the display to zero Reading of densities is done in the centre of each test area If a slight drifting of values is encountered the values should be averaged tolerance is 0 02 log D If greater variations are encountered the densitometer and the calibration strip should be sent to the manufacturer or authorised service centre since a new Calibration is not possible without the necessary testing devic2. Heiland electronic GmbH TD1 TD2 B amp W Densitometers USERS MANUAL Version 5 Table of Contents 1 GENERAL 4 2 SAFETY REGULATIONS sn na 5 3 AREA OF 5 4 INSTRUMENT 6 9 INSTALLATION Gassner engeren kann tits ansehe 9 O READING an 2 een nen 10 7 CARE OF 12 8 CALIBRATION CHECK eine 12 9 GUARANTEE nad EL 13 10 TECHNICAL DATA nennen 14 TD1 TD2 USERS MANUAL Ver 5 3 1 General information Dear Customer thank you for purchasing a Heiland densitometer In order to become familiar with the operation of your instrument please read these instructions carefully and completely before your first use Packing The packaging of the instrument is shock absorbent and should be kept for the case of further shipping Shipment Use only the original packaging for transportation and shipment First lay the cardboard on the surface of the base unit then place the plastic block between measuring head and the cardboard Finally put the instrument inside the plastic bag Put the calibration strip in the users manual and the users manual on the bottom of the shipment box then place the folded cardboard on the right side and the densitometer on the left side of the
3. box Put the cable into the folded cardboard N Safety regulations Assure that the main voltage and the frequency on the power supply unit is the same as the one indicated on the identification label of the power supply unit It is not permitted to exchange the power supply against another one without the permission of the manufacturer Always keep the instrument and the power supply in a dry place and never immerse it in any kind of liquid To prevent electric shock do not open neither the densitometer nor the power supply There are no user serviceable parts inside Area of applications These densitometers are designed for the transmission measurement of films like B amp W films for photographic applications X Ray films and microfilms The reading is taken in units of logarithmic density log D Application of this instrument in other fields is not allowed without our written permission The following applications are given as a brief introduction how to get benefits of density measurement Finding the right combination of film and developer Determination of true film sensitivity Determination of contrast Comparing diazo origin and copy TD TD1 TD2 USERS MANUAL Ver 5 5 4 Instrument description Figure 1 Components of the densitometer Zero or Min button Measuring head Mode LED s amp Display Probe Aperture Base unit TD1 Changeable apertures TD2 Changeable probes The id la
4. C 0 70 one calibration strip Appendix Communication parameters Appendix Communication parameters Communication port type USB 2 emulating a serial com port with 9600 Baud 8 Databit 2 Stopbit The measurement value is transmitted automatically by the instrument every time there is a stable value for about 1 second Following syntax is used Character No possible Char meaning T O Transmission StandBy Sign 0 9 Value MSB 0 9 Value 0 9 Value 0 9 Value LSB D Unit Density or Percentage of dot area CR End of string Examples T 1 53D Transmission density 1 53 log D 0 D Stand By Issue date December 2004 Technical data may change without notice TD TD1 TD2 USERS MANUAL Ver 5 15 Heiland electronic GmbH Schulstra e 8 0 35579 Wetzlar Heiland electronic Wetzlar Telefon 49 6441 26978 Fax 49 6441 26988 email heielec t online de Internet http www heilandelectronic de
5. After changing the probe the density display has to be reset to 0 00 log D Option 03 PC port At the back side of the base unit is an USB connector located A suited cable to connect the densitometer to a PC is delivered with this option See appendix for details 5 Installation 5 1 Location conditions Store and use this instrument only in rooms with a temperature from 17 C to 27 C degree Celsius and relative humidity from 0 to 70 percent Fast temperature variations may cause condensation inside the densitometer Wait at least 30 minutes after moving the instrument from cold to warm environment more than 10 C temperature difference Keep the densitometer away from these environment Direct Sunlight Instruments that emit heat Aggressive chemicals or liquids Strong magnetic fields e g from transformers voltage stabilisers or loud speakers Electronic devices that emit strong interference like dimmers 5 2 Switching on Assure that the main voltage of the power supply unit is the same as the one indicated on the identification label of this unit Connect the power supply first to the densitometer and then into the wall plug The instrument switches on automatically in a stand by mode Wait at least 2 minutes before taking the first reading TD TD1 TD2 USERS MANUAL Ver 5 9 6 Reading 6 1 General instructions Caution Always depress the measuring head softly until it stops on the film to be
6. bel is located on the bottom of the base unit The case of the base unit contains the transmission lamp The light is emitted through an opal diffuser The top of the base unit serves as a platform on which the film rests during measurement The measuring head is mounted to the base unit by a precise bearing The integrated spring pushes the measuring head in the upper position The head contains the sensing electronic below of it the probe is mounted The transmission lamp and the displays are activated when the measuring head is lowered The 3 digit display allows a precise reading down to 0 01 log D If the minimum sensitivity of the system is reached or if the measuring head is depressed to fast the display will flash 888 If an error occurs during measurement it will be displayed in the following way E XX where XX is the number of the error The only error that can be serviced by the user is 01 i e there is to much light at the probe This will occur if the aperture TD1 or the probe TD2 is removed In this case simply install the aperture or the probe and measure again In all other cases please consult the manufacturer The LED s beside the 3 digit display show the selected measurement mode while the measuring arm is lowered T Transmission measurement D Density values are displayed The MIN switch resets the density display to value 0 00 it is only active while the measuring head is lowered disp
7. es 9 Guarantee This instrument is fully guaranteed for the period of two years from date of purchase Proof of purchase is the invoice or receipt Damages due to improper handling or unauthorised access are excluded This instrument has been carefully manufactured and tested using defect free materials and state of the art technology In case of a failure the instrument should be returned free of charge to the manufacturer or authorised service centre accompanied by proof of purchase For the warranted period the manufacturer will pay cost of replacement parts and repair However the manufacturer reserves the right to exchange the instrument Important Both the instrument and calibration strip must be send back together TD TD1 TD2 USERS MANUAL Ver 5 13 10 Technical data Dimensions Weight Voltage requirements length x width x height Power consumption Aperture diameter Reading geometry standard Diazo UV probe of TD2 Maximum subject size Width x Height Maximum measurable density TD and TD1 aperture 23 0 22 0 21 0 0 5mm TD2 Reading variation Repeat accuracy Temperature range Relative humidity Accessories 200 x 100 x 100 mm 1 12 V DC by use of a wall plug power supply 0 5 1 2 3 mm according to the order diffuse directed directed directed 260 mm x 2 mm 400 3 5 D 3 00 2 0D 2 5D 1 0 02 log D 0 01 D 17 27
8. lay is on All other switches have no functions except on special versions TD TD1 TD2 USERS MANUAL Ver 5 7 TD The densitometer has a fixed aperture mounted inside the none exchangeable probe The diameter of the aperture is according to the order TD 1 This instrument is equipped with a set of 4 changeable apertures with diameters of 0 5 1 2 3mm Smaller diameters reduce the amount of light thus the max density is lowered The aperture is changed by pressing slightly on the edge of the aperture e g with the fingernail Please take care that the aperture directs upside while inserting After changing the aperture the density display has to be reset to 0 00 log D TD 2 This instrument is equipped with changeable probes The type is used for silver and neutral colour films and the type for Diazo films UV measurement For exchanging the probe grip the probe with two fingers and turn it clock wise or in the right direction facing it from above After 3 turns it can be released Attention Don t press the measuring head down without a mounted probe Otherwise you may damage the spring bearing Place the other probe in the hole inside the base of the measuring head and secure that the axial direction of the probe is in a right angle to the base of the measuring head Turn the probe counter clock wise or in the left direction facing it from above After some turns it is fastened Use no tools for fastening
9. measured To prevent damage of the precise bearing always let the measuring head return slowly to the up position Never try to raise it higher than this stop position On a digital display the actual value may intermit between two values The display changing back and forth between two values should not be a cause for concern 6 2 Instructions to avoid incorrect reading Especially when measuring high densities the subject must be free from dust lint finger prints and other contaminants Thick glass plates or filters should be read in low ambient light because of their light conducting tendency Films should be placed on the reading area with the emulsion side down 6 3 Instructions for reset to zero 10 Reset the display before starting a series of density measurements If the part of the subject used for zeroing does not have the lowest density a negative sign will appear while measuring lower density Since in photographic applications density is measured above the base fog zeroing should always be done on the base fog That is an unexposed but a developed area of film For other applications the free light flux can be used for zeroing this is equivalent to absolute zero If for the measurement of thick glass plates or filters zeroing to the free light flux is required then the subject to be read must be placed on the surface of the filter or glass plate so that the light source is not covered up but the p
10. robe rests on the plate when the measuring head is depressed l e the probe must always have the same height while setting the zero density and while measuring 6 4 Density measurement After zeroing the display measurement is done by slightly lowering the measuring head until light comes on then centre the area to be read over the light source and reading the value with the fully depressed measuring head TD TD1 TD2 USERS MANUAL Ver 5 11 7 Care of instrument The housing and especially the reading area should only be cleaned with a lightly dampened soft cloth or chamois if necessary with the addition of a mild cleaner Do not use solvents or abrasive materials The measuring head and probe should only be cleaned from dust with a soft brush or compressed air Unplug the power supply when not in use for long time periods necessary repairs send the densitometer and the power supply unit to manufacturer or authorised service centre Any unauthorised opening will invalidate your guarantee CAUTION To prevent an electric shock do not open the power supply There are no user serviceable parts inside 8 Calibration check The instrument is calibrated at the factory Certification is shipped with the instrument in the form of a transmission calibration strip on which the density values of the calibration are recorded If the fields are only numbered 1 2 3 4 please refer to the attached calibration list
Download Pdf Manuals
Related Search