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Olympus Imt Inverted Research Microscope Instruction

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OLYMPUS INVERTED RESEACH MICROSCOPE ~~ODEL INSTRUCTION MANUAL . ;" ' •• · "', ; -:y:sll·.·· .. /.:.';~ _'P-_-y~ .: f: . • . • ,. ' .' .. , ; • •.., . ., ' ; j JJ • •• .' . ' ," ', .' . -... . . ' ..., »:'>. • -: ',~.:·:··:'''V·<···;,,~.';·:. II· " • r.. ..~. _..,~::.<~_~.l;: ~~~ ........'-...'..... .... 1('-'':. ..... •• ... • • •• • IMT r~ ,J ~ • • nn lll . <..:0-. ~ .'. ••••••• ': if • • • • • • • •• ... II ••••• • •• _ _n,J I • P ' :lI .. •• .- r1il "fill . \ .. • I' I I .•."., • •• I.. -. ;..; " ' , II II • -'.:;:«~::._~ . • =• ~ 1II1 . • , • " .: , , , IIIIII1 '. II. IIIIII111 , . I , II OLYMPUS , . Thi s inst ruct ion manual has been prepared f o r the O ly mpu s Invert ed Research Microscope Model IM T . It is recomm ended th at you read the man ual caref ull y in o rder to famil iar ize you rself f ull y wi t h you r m icroscope in order to ob t ain opt im um perfo rmance f ro m t hi s precision inst rument . IMPORTA NT Observe th e following points car efully: • Operation 1. A lways handle t he m icros cope w it h the care it deserves, and avo id abrupt m otions . 2 . A vo id exposure of the m icros cope t o direct sunlig ht, du st and vi brati on. 3 . Only use the te nsion ad just ment ring for altering the t ension of th e coarse adj ust me nt kn o bs. Do no t twist the two coarse adjustment kn obs in th e op pos ite d irecti on s sim u lt aneously, as th is causes damage. 4 . Ascerta in that t he voltage select or swi tc h on th e base plate is set t o co n fo rm w i th t he local mains voltage. 5 . Di sconn ect the li ne co rd fr om the AC power ou t let for fu se repl acem ent . 6 . Object ives provided to t he Mod el IMT are designed for observat io n o f speci mens t hro ugh cu lt ure vesse ls of 1 mm th ickness. Therefore , be sure to use cult ure vessels, th e b ottom o f wh ich is 1 mm ±O.3 t hic k and even ly f lat . • Main te nance 1. Len ses mu st always be kept c lean. Fine du st o n lesn surfaces sho uld be b lown or w iped off by means of a hand bl ower or a clean bru sh. Carefully wipe o ff oil o r fingerp rin t s deposited o n t he lens surf aces wi t h gauze moi stened w ith a small amount of x y lene, alcoh o l-et her m ixture (7 : 3) or et her. 2 . Do no t use o rganic solutions t o wi pe t he surfaces of vari ous com pon ents. Plast ic part s, especi all y, sho uld be cleaned wi t h a neut ral dete rgent. 3 . Never di sassemb le th e mi crosco pe f or repair . 4 . The m icroscope shoul d be st o red in it s con ta iner im med iat ely aft er use. If this is not possible, it shou ld be co vered with the vi ny l dust cover provided . It is best to keep objectives and ey epieces in desiccat o rs. co n taining desiccants such as sili ca gel. CONTENTS I. ST A NDA RD EQUIPMENT 2 II . NOMEN CLATURE 3 III. A SSEMBLY 4 IV . IDENTIFI CATION AN D FUN CTI ON OF VARIOU S COMPON ENTS . 6 V. OPERATION . A. B. C. D. E. F. . . . . . . . . . . . . . . . . . . . 10 Electri c Equipment 1. Adjustment of Mi nimum Vol tage 2. 30W Tungsten Bulb Specimen Holders 1. With the Mechanical Stage 2. Without the Mechan ical Stage Obse rvatio n Tubes . . . . . . 1. Interpupillary Distance and Diopter Adjustments 2. Eyepiece Cap 11 Illumin ation for Phase Contrast Microscopy 1. Ultra Long Working Distance I llumination 2. Long Work ing Distance Illuminat ion 12 13 Field and Aperture Iris Diaphragms 1. F ield Iri s D iaphragm 2. Aperture Ir is Diaphragm Fo cusing Adjustm ent . . . . . . . . . . . . 1. Tensi on Adju stment of Coarse Adjustment Knobs 2. Au tomatic Pre-focusing Lever 3. Ad just ment of Stage Block Height 14 V I. OPTICAL DATA 15 VII. T ROU BL ESHOOT I NG 16 I. STANDARD EOUIPMENT Model Component IMT 201 203 2 11 213 M icroscope stand with p illa r and base IMT ·F 1 1 1 1 Revolving nosepiece IMT·R E 1 1 1 1 Binocular tube BH·BI 45 1 1 1 1 Plain stage w ith two extension plates IMT·S 1 1 1 1 Me chanical stage with three specime n ho lders IMT·MV R 1 1 Condenser holder IMT ·CH 1 1 Lo ng wo rking distance tu rret condenser IMT·LWCD 1 1 1 1 1 For ult ra long work ing d istance IMT ·U LWD For long worki ng di stance IMT·LWD Light annul us IM T·RS-lO Light annulu s IMT·R S-20 1 1 1 1 IMT·RS-40 1 1 1 1 Lamp hou se IMT·LH 1 1 1 1 30W tungsten bulbs LS30 3 3 3 3 Ach.4X 1 1 1 1 Ach. l OX 1 1 1 1 Ach. LWD·C20 X 1 1 1 1 , Auxi liary lenses Light annul i in mount IMT·RS Light annu lus Object ives 1 1 1 1 1 1 1 Ach. LWD·C Plan 40 X Eyepieces BiCK10 X, paired 1 1 1 1 1 Phase annulus slide IMT·SL 1 1 1 1 Centering telescope CT 1 1 1 1 Spare fuses 100 -1 15 A ( lAI or 220 -240V (0.8AI 2 2 2 2 Ey ep iece caps 2 2 2 2 1 1 1 1 1 1 1 1 45 G-533 G reen filter V inyl dust cover • Optional Accessories: 1. Trinocular Tube Mod el 8 H·T R45 2. Phot o Eyepieces FK2.5 X , FK 3.3 X , FK5X , FK 6.7X 3. Photom icrograph ic System Camera Model PM· 'O 4. Drawing Attachment Mod el 8 H·DA (Thi s att achment is provided with a magnif ication adjustment screw for use not only with th e Mod el IM T but also w it h vari ou s Olympus mi croscopes such as VANO X , BH, CH, etc . For use with the Model IMT the adjustment sc rew on the drawing attachment shou ld be set to the posit ion "C".) 2 I I. NOMENCLATURE The Model IMT is composed of var ious co m po nen ts and interch angeab le accessor ies . A var iet y o f com binations. stan dard o r, optio nal , is avail able acco rdi ng to y ou r requ irement s . Lamp ho use 30W tungsten lam p Plain stage Pillar t Mechanical stage A ttach able . Auxi liary len s For lo ng w o rki ng distan ce. Ey epiece Long wo rki ng d ist an ce tu rre t conde nse r Con den ser holder Ob je cti ve Obser vation tu be Revolving nosepi ece Phase annulus slide Sta nd • Base Ligh t an nuli for ultra Auxi liary lens lo ng wo rki ng d istance For ultra long wor k ing d ist ance. 3 III. ASSEMBLY * Th e picture below ill ust rat es th e sequent ial proced ure of assem bly . Th e number s ind ic ate th e assembly order of various co mponents. Remove du st caps before mou nting co m ponen ts. Take care to keep all glass surfaces clean and avo id scrat chin g the lens surfaces. @] @ Mech an ical stage (See NOT E 2.1 @ Specimen holder f! 1 ~ cl am p i ng 0 screws C lam p steadi ly w i t h a coin. @ Eyep iece E 5 == J ® Co nde nser @ Light a n n u l u ~ ® Lam p ho u se holde r ~~~:;~:r @ Eyepiece ca p t u ngs te n bul b ! Q) Co nd enser Stage ® 3M TI~ T ap ped ho le Jl~:~; -J lv wit h a coi n. N osepiece Clamp w it h sc rew prov id ed . Pillar clamping sc rew Lo wer limit st o p pi n K nu rled ring Rotate t he ring t o sta bilize t he base. NOTE 1: The lower end of t he p ill ar has tw o notches (larger one at t he fr on t and smaller one at the back ) and a co nnect ing co rd co mes out of it . Insert th e co nnect ing co rd and low er end of the pi ll ar into th e base hol e vertically and clamp th e p illar with screw at the bottom of the base. The p illar d irect ion is dete rm ined by f itt ing the no tches so th at the co nnect ing cord passes through the larger no tch and co nnects to the receptac le o n the left hand sid e of the base back . 4 NOTE 2: Th e mec hanical stage is attachab le t o the rig h t o r left hand side o f the plai n st age an d clamped w ith a co in. If t he mecha nical sta ge is attached, o nly one exten sio n p l at e can be attac hed to t he o pposite side of t he pla in stage. @ How to mount t he mechanical sta ge: F ig. 1 shows t he mechanic al stage attached on t he ri gh t hand side o f t he p lain s tag e. It is po ssibl e to attach th e mechanic al stage o n t he left side as shown in Fig. 2 ac co rd in g t o your prefere nce . To co rrect ly attach t he mechan ical staqeon eit her side, al ign t he edge o f t he mechan ical st age wi t h the plain stage co rner as indicated by arrow s. F ig. 2 Fi g. 1 To t ho se w ho w ish to use a left-han ded mech an ical stage, the mechanical sta ge w ith left-ha nd low dr ive contro ls Mod el IMT· MV L is op ti onall y avail abl e. NOTE 3: Set up the illuminat or: a) T o illuminat e f or lon g work ing distance ( Fig. 31: Mou nt t he aux il iary lens IM T -L WD CD t o the lam p hou se suppo r t ® and attach th e consenser and co ndenser ho lder t o t he plain stage; th en adj ust the heigh t of t he suppo rt ® , movi ng it ver t ically alon g t he pi llar un t i l th e lo we r edge o f t he suppo rt is aligned w ith t he ye ll ow l ine ® o n t he pill ar and d amp. Fig . 3 Fig , 4 b) T o illumin at e f or ul tra long w or k ing distan ce ( Fig. 4 ): Att ach t he auxi l iary lens IMT -ULM D CD to t he support @ and align th e low er edge of the support t o t he red line ® . For t h is use, t he con denser and con denser hol de r should be removed . cl For use of t he Abbe cond enser BH ·eD or A ch rom atic/ aplan ati ccond enser BH ·AAC : It is necessary t o moun t the op ti onal au x ili ary lens IMT ·A L t o t he lamp h ouse supp ort and attach th e con denser and con denser ho lder t o the stage. Th e lower edge of t he suppor t should be alig ned wi t h t he red line on t he pi l lar. For observat ion wi t h object ives 40 x o r h igher , use an ordinary object ive and pu t a cover glass under t he specimen . * d ) For use of th e di fferentj al 1~terference con trast attachment BH·NIC : It is necessary to ali gn t he lower edge o f t he support wit h the bl ack index li ne on the pillar, and use t he au x ili ary lens IMT - AL . On ly a cover glass of 0 .17 m m t hick can be used . * 5 IV. IDENTIFICATION AND FUNCTION OF VARIOUS COMPONENTS Filter mounts Inser t the green fil t er 45G -533 in t o one o f t he tw o m ounts f o r L am p house support phase co ntrast observat ion. Fi eld ir is diaphragm lever Sup p o rt locki ng knob Interpup illary distance scale Aperture iris d iaphragm lever Mechani cal t ube length adjust ment rin gs Conden ser height adjustment kn ob Low drive coax ial cont ro l kn ob s Ten sion adjustme nt ring Arrow mar k ind icat es increase in coarse adjustme nt t ension . Coarse adj ustme nt kn ob /.-N__- -- - Fi ne adjust ment knob Graduated in in cre ment s of 211 . Gro und term inal Pil ot lamp Main swi tc h Sliding cont ro l lever A s numbers in crease. vo lt age in- creases. 6 Stage cl ips I Index li nes Stage ex tensio n p late Light a nnulus centering screw Phase ann u lus insert io n slo t Condenser center ing screw Connect ing cord Nosepiece c lam p in g screw Level screw Rota te t he ri ng t o level t he base . L ine co rd recept ac le 7 III Aux iliary lens cla m p ing scr ew ----1_-·' --------~J] _.-:L~ lgh~ta:::.:.:.nn:::::ulu::::....:sc:..=.. l am2.P I~ ng_ sc r_ ew 111' Ligh t an nulus cent er ing screws Rheost at t rimmer screw A fter sw itching on, if necessar y , rotate this screw with a co in unt il t he b u lb is d imly li t w i th the slidi ng co n tro l lever at minimum vo lta ge p osition. Line voltage selecto r swit ch Se t t h e sw itc h to con form w ith Fuse ho lde r line vol t age. Press wi t h a screw d ri ver and ro- tat e co unte rc lockwise t o rem ove the ho lder. 8 SUMMAR Y OF PUTTIN G THE MICROSCOPE IN OPERATION Model IMT A. Mat ch t h e li ne voltag e selector switc h t o local main s vo ltage (page 8). B. Switch on th e light so urce. C. Rotate t he trimm er screw until th e illum inator dim ly li gh t s with slidi ng co nt r ol le ver at m inimum voltage po sition (page 10 ). D. A lign t he lamp ho use suppor t to t he index li ne on th e pill ar acco rd ing t o your m icr oscopic purpose (page 5). E. F. Place a spec ime n on th e stage (page 10 ). * Coarse fo cu s with th e lO X o bject ive. If necessary, sto p down th e aperture diaphra gm to r ea sier fo cu sing . Fo r ph ase co ntrast , ho wever, mak e it a po int o f opening th e full ape rtu re. G. Mak e interpupi llary and di opter adju stments (pag e 11 ). H. Ad just condenser heigh t if t he lo ng wo rking di sta nce co nde nse r IMT*LWCD is used (page 13) . I. Engage the pha se annu lus " 10 " . J. * Engage t he light ann ulus " 10". For th e use of th e au xiliary lens IMT· U LWD, engage th e light annu lus RS·l 0 . K. Center t he light ann ulus by means of th e centering telescope CT (page 12 ). L. Sw ing the objecti ve of desired magnifica t io n into light path . M. Match the light ann ulus to t he magn ification o f objective in use and cente r t he an n ulus. N. Adjust light int ensity. O. Fine focus. P. Adjust aperture d iaphragm and fie ld diaphragm (page 13 ). (Cu t o ff t h is page at d o tted li ne and pu t it o n th e wa ll n ear th e m ic rosc ope to see as a rem i nd er o f m icr osco pic procedu re .l 9 V. OPERATION A. Electric Equi pment 1. A d ju stmen t of Minimum V ol t age The m inimum voltage req u ir ed fo r t h e lig h t sour ce can be adj u st ed w i t h t he rh eo st at tr immer screw at th e mi cro scope base p lat e in accordance w ith t he li ne voltage and f req uency . Th e bu il t- in rheostat in co rp o rates a thy r ist or in i ts sem icond ucto r c ircu it fo r the follow ing adv antages : a) Ex t rem ely fi ne adj ustment of l igh t intensity . b ) Elimination of f l ick er and stab i lizat io n of ligh t in ten si ty . c ) Increased l if e ex pect ancy of th e bul b. For adju stm ent of t he minimum li ne vo lt age, ascertain that the vo ltage selector swi tch is set to con form w ith t he lo cal main s v o lt aqe, and t he slidi ng co ntro l lever ® is positi oned clo sest to yo u (l ow vo !taqcl , and then activa te the m ain sw itch CD . If th e bu lb is F ig. 5 di mly lit, t he seconda ry vol t age is co r rect. I f it is not l it at all, rot at e t he rheost at t rimm er screw ® grad ually wit h a co in, un ti l t he bulb is d imly l it ; t hen push t he slid ing co nt ro l lever fo rwa rd in orde r t o obtain o pt imum li gh t inte ns it y . {Fig. 51 2. 30W Tun gst en Bulb T he stand ard li ght sou rce incorporates a 30W pre -cen tered tu ngst en fil ame nt bul b, pr ov ided w ith a socket for pos it ive co nt act , el im inati ng t he prob lems of defect ive co nta c t and over -heat ing. When used at t he sett ing " 6 " on the contro l lever sca le, th e average life o f the bu lb LS30 is lon ger t han 200 ho ur s. T hi s is, h owever, greatly reduced, if the bulb is used at higher vo ltage. Theref or e, it is adv isable t o avo id prolon ged use at read ings over "6" (in the red zon e). * It is recommend ed t o avo id sw it ch ing on and off th e tungsten bu lb wit h th e slidi ng co ntrol lever at high int ensit y pos ition (away fr om th e u ser ). It red uces bu lb life. B. Specim en Ho lders 1. With the Mech anical Sta ge Mak e a cho ice of spec imen h o lder s accord ing t o your speci men and p lace i t on t he stage. Stage p late ho lder 60m m d ia . SIide h older Petr i d ish holder 2. Wit ho ut th e Mechanic al Stage Place a specimen on the p lain stage di rectl y and move it manuall y . @ Thi ck ness of cu lt ure vesse ls Ob jectives provided w it h t he Mo del IMT ar e designed t o observe specim ens t hrough 1 mm t h ick glass. Make it practice , the ref ore, t o use cultu re vessels or slides o f thi ckn ess 1 mm ± O.3. 10 @ Use of th e corr ect io n colla r of th e object ive LWD ·C Plan 40 X After co arse and fine ad just ments , rota te t he co rrect io n col lar . keep ing the specimen in fine focu s until op t imum resoluti on is o b tained . A p ro per use o f th is coll ar is specia lly ef fecti ve t o prevent th e deteri ora tio n o f t he ob jective resol ution to be caused by t he un even th icknesses of various pet ri d ishes, cu lt ure bottl es, etc . C. Observ at ion T ubes 1. Interpu pillary Dist ance and Diop t er A d justments 1) Hol d the knu rl ed sli d ing grips _ 1(08~ ( 0.43 --- (The resolving power is obtained at th e fu lly ope ned aperture d iap h raq rn.] Techn ical terms: · Work ing distance . Th e di stance from the specimen slide or culture vessel to the nearest poin t of the objective. · T he N .A . represents a performance number wh ich could be compared to the relative aperture of a camera lens. Th e quantity of light which the objective receives f rom the object increases w ith the square of the performan ce Numer ical aperture number . · Resolving power . Th e resolving power of a lens is measured by its ab ility to separate t wo poin ts. · Focal depth T he distance betwe en the upper and lower lim its of sharpness in the image formed by an opt ical system. As you stop down the aperture iris d iaphragm . the focal dep t h becomes larger . Th e larger t he N.A . of an object ive th e shallower the focal dept h. · Field number . A number that represents the diameter in mm of the image of t he f ield diaphr agm that is formed by the lens in fro nt of it. · Field of view di ameter . The actual size of the fi eld of view in mm. 15 VII. TROUBL ESHOOTING Causes T roub les Remedi es 1. Opt ical Sy ste m a) Field of view is cut off or illum inat ed irregularly _ Auxiliary mounted. lens is no t co rrectly Lamp house suppo rt is not pos itioned at cor rect height . Nosepiec e does not click in p osition . Correct ly mount the lens. (Page 5) Ad j ust t he height co rrec t ly . (Page 5) Sl igh tly rotate the no sepiece unt il it clicks into posit ion. ed to the ob servation purpose. Co rrect it referring to " I I I. ASSEMB LY " at page 5. Co nde nser is no t corr ect ly moun ted Remount th e condenser corre ct ly . Illuminat ion is not correct ly match- on the holder. F ield d iaph ragm is stopped down excessively . Bulb is not correctly att ached. Open th e d iaph ragm properl y . (Page 13 ) Re-insert it into t he socket all the way . Phase annulu s slide is not click stopped in posit ion . b) Dust or dirt is visible in Cli ck it into position . Dust on condenser top lens. the field of view. D irty speci me n. Rem ove d ust . D ust on eyep iece. c) Excessive image contrast. Co nde nser is excessively in h igh Low er the co nde nser. position. Apert ure ir is diaphragm is stop ped Open th e d iaph ragm . (Page 13 ) down ex cessively. d ) Resolutio n problems: • • • O bject ive is not co rrec t ly posit ion - Slightly ro tate the nosepi ece unt il ed in l ight path . it cl ick s into posit ion . In case of LWD·C Plan 40 X , cor- A djust th e co llar co rrectl y . (Page 11) Image is not sharp . Insuffici ent cont rast. I mage detai ls lack ce- rect lo n co lla r is not adj ust ed . f init io n. D ust on object ive fro nt lens. Clean. Dirty spec imen . Dust on condenser lens. Illu m inat io n is not mat ched to o bservat io n pu rpose. th e illum inat io n ref erring to " I II. A SSEM B LY" at page 5. Cor rect Speci me n slide is mo unted on the Reverse th e specime n slide. (Page stage upside do w n. 10) 16 T roubles Causes Remedies e) Specimen image is part ialIy o u t of f ocu s. Objective is not correctly positioned in li ght path . Slightly rotate the nosepiece unti l it clicks into positio n. Specimen is not correctly posit ioned on the stage. Piece the specimen correct ly on the st age. (Page 10) f ) When objectives are changed they are not par fo cal. Mechanical tube leng th is not correctlyadjusted. Adju st the length w ith th e tube length adjustment rings on observat ion tube. (Page 11) gl No effective phase contrast is obtained. A perture iris diaphragm is stopped down . Open . Object ive, l ight annulu s and pha se annulus are not correctly matched. Mat ch them cor rect ly . (Page 12) Light annulus and phase annulus are not correctly centered . Cen ter th em co rrec tly. (Page 12) V olt age selector switch matched to mains vol tage. is no t Ma tch the selector sw itch to mains voltage. Mains voltage is too high (or t oo low ). Adjust mains voltage with a variable vo ! tage transformer. Rheostat trimme r screw matched to mains voltage. is no t Adju st t rimmer screw unt il the bu lb is dimly lit w ith slid ing control lever positi oned at minimum vo ltage. (Page 10) Vo ltage selector sw itch matched to mains voltage. is no t Match the selector switch to mains voltage. Mains vol tage is too low (or too h igh). Adj ust mains voltage w it h the varl able voltage transformer. Ma ins voltage is unstable. Use a voltage stabilizer. T he f il amen t o f bulb is likely t o burn out. Rep lace the bu lb . Loose electric connect ion. T ighten the connect ion. Fuse is not a standard one. Use a standa rd fuse. 2. Electric System a) Illuminator is to o br ight (or too dark ). b) Vo ltage f or illuminator cannot be regulated. cl T he ligh t f lickers and th e intensity is unstable. d l Fuse burns ou t too often. V oltage selector switch matched to mains voltage. e) Pil o t lamp l igh ts bu t iIluminator bulb does not. f ) Reduced bu lb l if e. is not Match the switch to mains voltage. Th e bulb is burned out. Repl ace th e bu lb . Loose electr ic connectio n. T ighten the connection. Vo ltage selecto r switch matched to mains voltage. is Th e bulb is not a standard one. 17 not Match the selector sw itch to mains voltage. Use a st andard bu lb. Causes Remedies Bul b is used on higher voltage to increase light intensity . Keep the o utput vo ltage unde r 6V (wi th th e slidi ng cont rol lever at " 6" setting on the scale ) as much as possible, or use a high inten sity light source such as a halogen lamp, etc . Ten sion adjustment ring is t ightened too much . Loosen the tension adjustment ring properly . (Page 14) Th e user is try ing to lower the stage passing over th e lower focusing limit imposed by the engaged prefocusing lever. Unlock the pre-focusing lever. (Page 14) b) Stage drops and specimen goes out of focus. Th e tension adjustment ring is too loose. Ti ghten the ring pr op erly . (Paqe 14) c) Stage cannot be lowered to the lower limi t of th e work ing range. Pre-focusing lever is engaged in higher than focusing position. Unlock th e lever . (Page 14) d) Stage cannot be raised to the upper lim it . Stage bl ock is not aligned to the correct stage block height index . Adjust the stage bl ock height correctlv . (Page 14) Interpup illary d istance is not correctly ad just ed. Correct the interpupillary distance. (Page 11) D iopt er adjustment is incomplete. Co mp lete d iopter adju st ment. (Page 11) Th e user is unaccustomed to bin oGular vision. Prior to loo king at specimen details, t ry to look at the ent ire field of view, or look at a far away object before resuming microscopic obser vation. a) Image easily goes out of focus when yo u touch the stage. Th e stage is not correctly clamped. Clamp th e stage securely. b] The specimen stops midw ay on the east-west traverse. Specimen is not tioned on stage. c) Specimen stops midway on the north-south traverse. Mechanical stage is not mount ed in correct positi on. Troubles 3. Focusing a) Coarse adjustment is too t ight. 4. Observation T ube a) Incomplete binocular visio n. 5. St age correct ly 1B posi- Adju st specimen positi on. M ount the mechanical stage in correct position. (Page 5) MEMO : . 19 OLYMPUS OPTICAL CO. LTD. 01VMPLJS ..:::tOKYo:.. 43-2, HATAGAYA 2-CHOME,SHIBUYA-KU TOKYO, JAPAN. Prited in Japan 7904 M 03