Heiland electronic TD Manuel utilisateur
B&W-Densitometers
USERS MANUAL
Revision 6.1
Heiland electronic GmbH
TD / TD1
2
TD / TD1 USERS MANUAL Ver.6.1 3
Table of Contents
1. GENERAL INFORMATION...........................................................4
2. SAFETY REGULATIONS .............................................................5
3. AREA OF APPLICATIONS...........................................................5
4. INSTRUMENT DESCRIPTION......................................................6
5. INSTALLATION............................................................................9
6. READING....................................................................................10
7. CARE OF INSTRUMENT............................................................12
8. CALIBRATION CHECK..............................................................12
9. GUARANTEE..............................................................................13
10. TECHNICAL DATA...................................................................14
4
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
box. Put the cable into the folded cardboard .
TD / TD1 USERS MANUAL Ver.6.1 5
2. 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.
3. Area of applications
These densitometers are designed for the transmission
measurement of films, like B&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.
6
4. Instrument description
Figure 1, Components of the densitometer
TD1 Changeable apertures
Measuring head
Mode LED’s & Display
Zero or Min. button
Probe
Aperture
Base unit
TD / TD1 USERS MANUAL Ver.6.1 7
The id-label 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 'E 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 (display is on).
All other switches have no functions, except on special versions.
8
TD The TD 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.
Option 03: USB 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.
TD / TD1 USERS MANUAL Ver.6.1 9
5. Installation
5.1 Location conditions.
Store and use this instrument only in rooms with a temperature
from 17C to 27C (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.
10
6. Reading
6.1 General instructions.
Caution: Always depress the measuring head softly until it stops
on the film to be 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.
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.
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1
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