Wallner CA526 Color Analyzer

E N GI N E E N ' N C C O RP O E A T ' O N . (408)372-5038 P0.BOX 1849. PEBBLEBEACH, C493953

LABEX-WalLner I'todel CA-526 Digital

Spot Color Analyzer

OWNERS MANUAL

LABEX Engineering

Corporation

Pebble Beach, California . Copyright

1989

T I I I i

Table of Contents

I

Technical Control Controls

I

I

t

T

and Setup

fntroduction

t t t t

Installation

Specifications

Locations and Displays

Setup W a rr a n t v II

Calibration fntroduction Color

Target

Diffusion

Method

lrlethod

Summary of Calibration fII

Steps

User fnstructions Introduction pack

Determination

of Filter

Determination

of Exposure

Exposure S u m m a r yo f U s e r I n s t r u c t i o n s

!F

F I t t F t F tI It I I I I

t t I

!

Introduction

Installation

and Setup

The key to outstandingphotographic results is reproducibility. Vgry few, if any photograpn6rs would consider using a camera without first consufting an exposure meter and perhaps a color temperature meter. Co-nsistenciy in the entire photographic process demands a similar level of- control in the printing phase. The LABEX-wallner Digital Spot coloi Analyzer was designed to respond to the same need in the printing process that the color temperature meter serves in the mafing od lf,e negative or transparelcy. C o u p l e d w i t h t h e L A B E X - I ^ I a 1 l n - e rM o d e l u 6 S O g l , t w Integrated Di.gital Exposr:re Meter and Timer r it addresses noin questr-ons of importance to the printer: i) wha.t is the;r;p;; _ c o l o r filter pack to produce the color toires desired? 2) What is the Ploper exposure to obtain the desired color saturation? In addition' the combined instrument provides automatic contror of exposure timing. You will parts:

find

this

manual conveniently

f

Installation

II

Calibration

III

User Instructions

into

three

and Setup

Please read each of these thoroughly instructions which vtere designed- to with the Least possible effort. Technical

divided

and follow the step-by_step obtain profeisional- results

Specif ications

The LABEX-WaIlner CA-526 Digital Spot Color Analyzer is a _microprocessor controlLed instrument desigied to meet the needs of the most demanding darkroom worker. Color

Balance Measurement Filter

Range:

-199 to +199 togarithmic density units.

Measurement Modes:

Spot or Integrated (diffused) ; Cyanr ye1low and Magenta; switched from m e a s u r e m e n tp r o b e .

Memory:

Unlimited plug-in memories.

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zero Set:

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Push button.

Measuring Probe Aperture 3

5 .0mm.

Cosine Correction:

Built in swivel- +/-10 deg. in all directions.

Sensor Configuration:

Black Body, (insensitive off-axis safelight illumination).

to Displays Filter

Density:

Mode:

3 digit,

LED.

Cyan, Magenta, YeIlow (and Time when used with the M C 5 0 9 l 4 w.)

Accessor ies Diffusion

filter,

m e m o r ym o d u l e a n d o w n e r I s m a n u a l .

S p e ci f i c a t i o n s Voltage:

+/- 5VAcr 300Ma. (Derived f r o m t h e l ' 1 C 5 0 0 MI W ntegrated Digital Exposure lrleterTimer or the Model 500 Power Supply).

Dimensions:

8 i n . W x 3 i n . H x 7 i n . D.

Figure I CONTROLS

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I

controls

t

-0-

T

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t Irl

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I

Sets Filter

Switches

t

t

(Refer to Figure 1 for

locations)

Push button

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and Displavs

Density Display

to

Zero

(on measuring head)

1.

Analyzer-Exposure Switches between Color Analyzer and Exposure-Timer (when used witfr functions M C 5 0 9 M W. )

2.

l'lonochrome-Cyan-Magenta-Ye1low selects f iltration and switches appropriate circuitry within the analyzer.

Displays 1.

Filter Density (unmarked) indicates filter change required for balanced filter pack in logarithmic density units.

2.

Mode (unmarked) indicates Cyan, yellow or tlagenta when in Analyzer mode and Time in Exposure or Monochrome mode (when used with MC509MW).

Setup The LABEX-Wallner CA-526 Digital Color Analyzer presents no particular problems. instaLlation rt should be placed on top of either t h e M C 5 0 9 M WT i m e r E x p o s u r e l " l e t e r o r t h e M o d e l 5 0 0 p o w e r supply and plugged into the jack marked 'l4K'. The instrument may be located anywhere convenient to the operator. The LED righl s o u r c e s p o s e n o f o g g i n g h a z a r d s t o m o n o c h r o m eo r c o l o r m a t e r i a l s . speciar caution should be taken however to prevent spilling processing solutions on the instrument or exposuring it to relative humidities in excess of 85t which may affect measurementaccuracy. W a rr a n t v LIMITED ONE YEAR WARRANTY LABEXEngineering Corporation warrants this product to be free from defects for twelve months from the date of purchase by the original c o n s u m e r . L A B E Xw i l l r e p a i r o r r e p l a c e a n y p r o d u c t covered by this warranty. If a defect is discoveredr you must contact LABEX directly. Our customer service department will tell you how to obtain warranty service. This limited warranty does not cover any costs associated with installation or removal of this product; including but not limited to any such costs necessary to obtain warranty service. This lrmited warranty shall- be invalid if this product is

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improperly installedr subject to misuse or abuser or if any repairs of the product are attempted by anyone other than LABEX. The duration -of an.y implied warranty given with this product is limited to the duration of this express limited warranty-. LABEX expressly disclaims any liability for incidenta] or consequential damages arising as a result of the sale or use of this product. Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidentil or conseguential damagesr so the above limitations may not apply to you. gives you specific This warranty legal rights, and you may also have other rights which may vary from state to state

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If

Calibration

fnt roduct i on The analysis of color negatives or transparencies and the selection of filter pack, (and exposure)r may be carried out either by reference to a color target, such as a grey cardr or by the method. A standard color target "diffusion" is the prefLrred method in professional photography. fn this method a nltandard" color target is included in each camera exposurer or in each series of_similar exposures, and this target supplies all of the necessary information to the analyzer for coLor balance (and exposure). r; most commercial photography the "standard" color target chosen is an 188 grey card. photography the nstandard" color rn portrait target chosen is often skin tone with allowance for individual col-or differences. In the "diffusion" method the entire image is diffused with the expectation that the color batance of the naveragen scene will be a neutral grey of some 'average" reflectance. fn general however, scenes frequently have a dominint color and some are bright while others are dark. we strongly reconmend the use of the color target method for color balance ina exposure determination. Following are step-by-step instructions for calibration papers for of color color balance using the standard color target and the diffusion method. Instructions for exposure caLibration may be found in your MC509MW Users Manual (if used) and exposure calibration should be carried out in conjunction with color balance calibration. Color

Tarqet

Method

1. Select a well exposed color negative or transparency containing a standard color target such as an 1gt grey card. 2.

By trial and error make the best possible g x 10 enlargement using fresh chemistry, paying special attention to following a STANDARD PROCEDURE. (Use an exposure time of at least 10 seconds to minimize errors introduced by Iamp afterglow).

3. rnstall a Plug-rn MemoryModule in the socket provided in the Color Analyzer. A separate MemoryModule rs required for each type of paper to be used. 4. Without altering enlargement ratio, f-stop or filter pack r turn off the safelights and turn on the (press the FOCUSbutton if enlarger, using the position MC50gMW Exposure t'leter-Timer ) . the measuring head on the projected image of the standard color target. Using both hands on the cosine-correcting measuring headr align it with the projected image such that the shadow of the ring is centered about the dark sensor aperture.

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5-

Press the Analyzer-Exposure measuring head so that the (Analyzer Mode).

6-

Turn the Monochrome-cyan-Magenta-ye11ow selector switch on the measuring head-to ine cyan position, (large p a r t i a t l y o O s c u r e A). " c ' The Mode h li lr_l " s9hootw l n i r l u m l n a i " a D i s p l a l ' "w a n d a- r a n d o m number wir-1 appear in the LED Frlter p"n"ity Display. Next press the _0_ f,utton. T h e displalz will now read "00n (or n-00").

I

rocker switch on the white dot ii visiure,

7. Turn the Monochrome-cyan-Magenta-ye11ow switch to the Magenta position. T h e t q b a e o i s p i a y- w iwr fi l r show an 'Mn and a iltuminated random nurti"r in the LED Filter D e n s i t y- .i r r u m i n a i e d U s i n g " paG ; ;s m a l l _ O i s p l a y . screwdriver, (a small screwdriver is s u p p l i e d w i t h t h e M c 5 o g M wn x p o s u i e Meter-Timer), a d j u s t t h e _ R E D _p o t e n t i o m e t e r in lr," Memory Module until the LED display reads "00" (or ,_00n).

I

8. Turn the Monochrome-cyan-Magenta-yerlow switch to the yg]10y posirion. The r'r6ae oispriy w ill show an 'y' and a iltuminated r a n d o m n u *-b' -"ei -a i u wsi rt l in the LED Filter t p ; ;y E L L o w t h" e . D e n s i t y o i s p r a y-.M o d u r e potentiometer in the uemoiy until the LED disPIaY reads n0O" (or n-00"). NOTE: rf a zero balance cannot be attained with either the 'M' or 'y. potentiometer, it will-Le necessary to readjust the nc" potentiometer in the Memory Module and repeat steps 6 through g. 9.

If

using the MC509MW Exposure Meter_Timer, complete the caribration process by calibruiing that unit for ! h " e x p o s u r e - ( s e e y o u r n c s o g M Wo w n e r , s M a n u a r f o r details).

10. Note the type of paper in the panel provided on the Memory Module. This completes the calibration procedure. D : . ff u s r o n M e t h o d calibration o f t h e c A - 5 2 5 c o l o r A n- sa al ymzee r u s i n g t h e diffusion method is carried out by fo].lowing the steps described above f o r t h e c o l o r T a r g e t t ' t - e t n o aw i t n t r r e e x c e p t i o n that a diffused i m a g e o f t h e e n t i r e f r a m e i s s u b s t i t u t e d- n u : roi'tte--irig!-or the color target in step 4. A dif f usion f ilter -11 . b . e e n* p p i l " o w hich may be instatred in rhe red filrer horalr

q4" or adapred to the enlarging lens cover to produce a aiil'""JifiJ;"'. ";t;;;;; rr should b e k e p t i n m i n d w h e nu s i n g t h e D i f f u i i o " M e t h o d th;C th" unulysis

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of the negatives and transparencies will- be based on some average color, usually assumed to be neutral grey, and some average scene and that scenes which differ significantly from the brightness, require additional caLibrated color balance and brightness will to obtain optimal prints. operator effort Summarvof CaLibration L.

Steps

test print l{ake a correct negative or transparency.

from a properly

exposed

2 . S e t t h e d i s p l a y e d v a l u e o f t h e C Y A Nm e m o r y t o z e r o b y pressing the -0- button. 3 . S e t t h e d i s p l a y e d v a l u e o f t h e M A G E I * I TmAe m o r y t o z e r o by a.d3usting the RED memory potentiometer. 4 . S e t t h e d i s p l a y e d v a l u e o f t h e Y E L L O Wm e r n o r y t o b y a d j u s t i n g t h e Y E L L O Wm e m o r y p o t e n t i o m e t e r . 5.

exposure Calibrate Meter-Timer.

if

using

the

zero

l , l C 5 0 9 M WE x p o s u r e

I I

III

User fnstructions

fnt roduct r on u s e o f th e L A B E X -W a11n_e_r cA- 526 Digital involves three distinct "t"p",

spot col0r

Ana l y z er

f

Determination of the correct filter paek- to produce a print with the rlesired color balance using lf,e Ca_SZO.

II

Determination of the correct exposure to produce a print with the desired color saturation l u s i n g t h e M C 5 0 9 MoWr other means).

III

E x p o s u r e ( u s i n g t h e M C 5 0 9o r o t h e r timer).

The foll0wing

step-by step instructi_ons- will ' uh e li"' p ot h e u s e r t o c o m p l e t e .n " ::^ quickly una . l tr^ ::_ :.:0 ." insight into the process whicn wilr sive s om e n f u r n "r s u,"r g gije s t a d d i t i o n a r . r { a y s i n w h i c h t h e i n s f r u m e n t * u v b e u s el d to-proaui-e a;id" variety of

n o " " i b r e w i r h o u l r h e s e n s i i o m e t r i cc o n r r o l a r r o r d e d by

i;:"li:rl::

Determination

of Filter

pack

1 . fnstall

t h e a p p r o p r i a t e M o m o r yt r l o d u l e f o r the paper to be used. Mount the negative or L r i r , " p " rency in t h e e n ' a r g e r a n d f o c u " t n u i m a g e; t - h l n e e ntarging l e n s a t a m a x i m u ma p e r t u r e .

2 . Position the measuring head.gn. !ojected image of t h e c o r o r T a r g e r . ( r i o t e : i f t h! he " o p iii,i"ion Methodis be usedr place the diffusion filter t: oo p r o d u c e a d i f f u s e d i m a g e ) . u s i n g - o oi t,nr " , t h e L e n s t h e c o s i n e - c o r r e c t i n g m e a s i r r i n g h " ; d , - u t i g nh a n d s o n it with the projected imagesuch that t6e;h;;; o f t h e ring is centered aboui tr," a"it "."ior-iplliur". 3 . Press the Analyzer-Exposure rocker switch on the measuring head so tnlt the white d o t is visible, (Analyzer Mode). 4.

5.

T u rn th e M onochr om e- cyan- Magenta- ye110w ser .ec tor switch on the measurin! head to rh;-a;;n p o sition, (larse whire parii;iit;;;-r#;. -;c;-lno rhe Mode . d o t Display wir-1 show an irium:nat;d a. random number will a p p e a r i n t h e L E D l-i r t " " , Density Display. Next piess the -0- button. T ; ; L E D Filter Density Display wil1 now read "00;-, ioi _OO"l. Turn the s w i t c h orr"^.\1,:":."Lt_lg "o:::hrgT9-cv?n-Masenra_ye11owselector

ro rhe l,"g"ntu posirion. rhe ModeDisplay-will .q".ud. srrow-""-iiruiifi;l':;

'M'. The necessary change_in magenta filtration will be indicared in tne lnrj Fi1rer D";;i;y Display. 6' Adjust

I I I I I T

the magenta filtrati.on

by

the indicated value. F i l t e r D e n s i r y o i s p r C y-"iri'i"ua ,00n, (or TlEoil"

7'

Turn the s w i t c h o n t{o:i"^lr_"me-cyan-}ragenta-yer.row h e m e a s u r i n- "gh-oh"e a tdr o t n e v " r r o r o p ser.ector osition. The Mode Display will

8'

,y,.

illuminatea

The . i' il: Iff i : : i :5, intI?" # rrt?t"t "i f"'rt l.r1"; . V : ; " " Adjust the yellow "r,

filtratron

r h e L E DF i t . : r _ ? : " : i f v

by the indicated

oispiiv-"iri"I"uo

"-00"). This.complet6s tte color f iltration.

a"i"i^inition

, 0 0v,a, l,u(eo. r of

the

NOTE: rf a zero balance cannot be .attained with either the Magentaor yeLlol i .t s o m e c y a n f i l t r a t i o nf i t t r attoi o nt h, e f i l . t ""il i i b " , . , - " I l " " " r y r o a d d pu"r."il repeaL the balancing procedure starting at s t e i a - -atro-oer v eng . Add cyan ' latr f i rtra ti o n i n the am ount ttr at- .vou abr.e to balance the magentaor Veffow filtration. Determination of Exposure rf using the Mc50gMw'switch the rocker switch on Lhe m e a s u r i n g h e a - dt o n x p o s u i e (white 'ownef'led) and follow _ M o d e , - 9 o t o b s c u r -;;posure in

53i"f,rrrt""""fr""li resr Slii;::t

vou.- r'rcsoeuw

uanuar f t;

rime

t i m e m a v a l s o b e d e t e r m i n e dr h r o u s h rhe use of rimed

Exposure I f u s i n g t h e M C 5 0 9 M W ,f o l l o w e di rections in the MC59 OI , l W O w n e r ' s M a n u a l f o r e x p o s i n g t h e p r i nt h t. Exposure may a1!o be controLled by any electromechanical exposure timer. S u m m a r vo f U s e r f n s t r u c t i o n s

1' t"fluotl fj"%appropriare

MemorvModulefor rhe paper

2. Determine the correct f,ir-a".. pac.k matching cyan. m a g e n t a d n d , v g 1 l o w f i l _ t e r , l e n s i t i .; b ; y rn a projected image of the Srandard C"t";-Ti-rnia (or riif f used i m a g e ). 3. Determine the correct exposure.

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4. Expose the enlargement.