WILD N3 The precision Ievel with unique features
Technical data For years the WILD N3 has been a standard for precision and reliability. The latest N3 builds on this tradition. Standard deviation for 1 milei1km double run levelling i0.0008ft i0.2rnin The classical use of the instrument is for Telescope with panfocal optics erect image geodesy, particularly the measurement Clear objective aperture 2.05in 52mm of national networks. For the highest accuracy requirements iii engineering and Magnification M Distance for the control of structures, the N3 is and field of view FV OD 46>»: if-1.0“ widely employed. And there are other new ltltlm (330ft) 45>»: 1.83m ( llft and rapidly growing fields of application. 10111 (33ft) 34>»: 24cm (9.5in Today, in industry, laboratories, for 21 >< g 3c_n1__§3. 1n research and for special measurements, _,2m-t6~5ft) a precision level of the highest class Shortest focusing distance: is needed. Standing aiiis to target 1'i.'iin 45cm Cover giass to target 11.0in 28cm The N3 is designed to meet this multiplicity Tubular level, sensitivity per 2mm 10” of requirements, and it incorporates the Setting accuracy of split bubble i(l.25” latest advances in technology. Circular bubble, sensitivity per 2mm 2)‘ The N3 is a spirit-level instrument. Tilting screw with graduation 8 revolutio For very good reasons. Range = 8 revs = 4t]=[l intervals i3.400ini1l]Din 4.CIUmnii The inherent qualities of a well-designed (400 :1[lt] DUO} '1l.{]4UUfti1Uft 3 precision spirit-level produce a basic 1 revolution = St] intervais IIl.[l5Uini1UDin {l.5[lmnii stability that an automatic level can hardly (5t]:1[l[l tltlfl) fl.i][l5Uft11[lft 1 match. 1 interval on drum '3.0U1iiti1DUin 0.U1mmi (1:1t}llII]ll{l) =3.{][ll]1fti1Dft Although a few first-order automatic levels, Accuracy of measurement '3.5"iCl.4% of measured inclination such as the WILD NA2 with parallel-plate micrometer, are capable of levelling Parallel-plate micrometer Range Iutervai Estimation accuracies approaching that of the N3, with glass scale ' 10mm 0. 1l"l’ll'1'1 l].(i1mm there are circumstances and fields U.5in [l.t)U1in l].{llJ[l5in of application where the spirit-level Environmental range —-30" to +6U°C --22“ to +14Cl‘°F instrument has important advantages. When running lines of first-order levels in Weight 1|! windy conditions, the N3 will give reliable N3 5.1kg results. The reason is the tubular level, with accessories in container 3.-*-tkg the stability of the instrument. Tripod GST4{l, with rigid legs 6.Ukg 6.5kg Industrial users, laboratories and research Tripod CrST2{l-9, with telescopic legs establishments will find that the N3 is relatively unaffected by vibrations and that “mug P rman nt magnetic elds have no The N3 can be used for measuring small Aggggggrigg influence at all. iiicliiiationsfor- - . ~ river- crossings.-in geodesy Th - v r st ff nd imerchan gable , _ _ e in a a s a g and fciprsstetting and controlling inclinations eyepiaces are of particular interest to the In In u IF" geodetic engineer. And it E35 atplllll rful tgla c pe with The optical tooling ciipcrt will appreciate zlignr jsgac Em C5 an 3 lgnmen the variety of specialized accessories which P P ' make the N3 such a versatile instrument for industrial measurements.
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3|" it_.,_,_._ _'_“._l— _..p II-t' 'I£"In-i U,‘ iss-* ‘f "1' fir-rs.”1*"'I"_,_,;.,- es,/Tis/I ‘J-5::4 _ if‘Ill-» For the highest accuracy in geodesy, engineering and industry
First order Engineering and Optical tooling, industry geodetic levelling deformation surveys and special tasks lilll _-
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o First-order geodetic levelling for o Height control for engineering o Measuring the heights of machine national networks. projects. components. I t).2m_m standard deviation for 1km o Deformation and subsidence I Setting base plates and rollers horizontal double-run. measurements. and at‘ the required height. o Carrying lines of levels over wide rivers. o Checking bridges and structures. o Investigating the deformation of I Determining crustal movements. o Monitoring movements. bearings and drive shafts. I Height measurements for scientific o Measuring the flatness of beds, studies. blocks and plates. 0 Aligning and positioning components. I Checking the straightness of axes and rails. o Determining and setting inclinations. o Establishing and calibrating optical and mechanical control systems. o And a wide variety of other specialised tasks.
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teica Ernest lgl Design Powerful panfocal telescope with micrometer For precise measurements and alignment
Panfocal telescope Built-in parallel-plate Split bubble and micrometer scale with erect image micrometer in one eyepiece The telescope is outstanding. The large, The micrometer is an integral part of the Quick setting of the bubble-ends in light-gathering objective provides a bright, N3. A cover glass protects the objective coincidence is facilitated by an arrow, high-contrast image, even in poor light. and plane-parallel glass plate from dust which indicates how to turn the tilting The N3 telescope has the power needed and moisture. screw. for work of the highest precision. Tilting the plate produces a parallel shift of As the bubble and micrometer scale are the line of sight in the vertical plane. The seen together in the same eyepiece, the Zoom characteristics total shift corresponds to the graduation observer is always cerlaiii that the bubble In contrast to the commonly used annal- interval on Wild invar staffs. is set when reading the inicrometer. lactic telescope, both the magnification and the field of view of the N3 telescope vary with focusing distance. When running lines of levels with the staff at the usual 30m to 5Um, the magnification is in the 4U is to 45 it range needed for geodetic work. Extremely short minimum-focusing distance A. target 3l]cm (12 inches) in front of the cover glass can be brought into perfect focus. When focusing close up, the magnification decreases but the field of view widens to provide an overall view and perfect rea- ding of optical tooling scales. A short mininiuni focus is essential for measurements in industry and Reticle with wedge-shaped hairs Micrometer readings are taken from ii laboratories. and single line glass scale. fl. lmm is read directly in figures; U.01niiii can be estimated. In geodetic levelling, precise setting Metric and inch versions of the N3 are i Megni cati'on to the graduations on Wild invar staffs is facilitated by the wedge-shaped hairs. available. so x ~ - — — — — — — — — — — — — — — — — — — — — — itnellacrlc telescope By turning the micrometer, a graduation With the parallel-plate micrometer, is centred exactly within the wedge. so _ staff readings are taken with an accuracy E N3 telescope Fm long gightg whcll lcvcllingg U1-far ¢|,-35¢- that matches the iO.25” setting accuracy Elix- up measurements in industry to optical of the N3. tooling scales, the single horizontal hair is itl x used. Standing axis made of steel Distance The shaft and bush of the main axis are I 2! 4‘ Ill Pill -fill l ill m .- Alignment properties turned out of nitralloy steel. lvlinute The bore of the telescope tube, the nianufacturing tolerances in the micron 1 Angular field of view ceniring oithe optics and the run of the range ensure the perfect match needed for Fed‘ focusing lens are all to a high degree complete stability and precise rotation. ziir l of exactness. These factors, coupled with lee i the inherent stability of the instrument, I50, _ N teiescope allow the N3 to be used as an alignment i.?Il" ~ telescope.
,. I I | I I | | | I I | | I I | | | | I I When changing focus from lllllm to 2lJm_, nnallaerlc telescope 33% any variation of the line of sight will not I Distance exceed l].5". From 3[lc-m to 2m, linear ?'Ti i'_ii_" illl is is iliem ' deviations will be less than 20 microns.
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4 -F,--'+i#- Gradienter screw and other design features Rugged, stable, superb to handle
Frictionless tilting axis Other technical features view is fully utilized, that brightness is Intense research led to a new type of tilting Full revolutions of the tilting screw are uniform and the eye relaxed, and that the axis. Crossed spring plates provide a joint shown on a scale close to the eyepiece. observer can concentrate on setting the that is immensely strong yet completely bubble ends together and the hair on the frictionless and free from wear and tear. To adjust the line of sight, simply turn the staff graduation. cover glass [a thin wedge). It is easy and This solution guarantees high instrumental exact. There are no visible adjustment Quick to use stability and precision. screws for the tubular level to concern the user. The N3 can be set up quickly and easily at a comfortable height for observing. Calibrated tilting screw A horizontal clamp and fine motion drive View the circular bubble via the The tilting screw is a gradienter. One are provided for alignment work. pentaprism and centre it by turning the interval of the drum corresponds to The detachable eyepiece permits the use rapid-action footscrews. Put the tilting 1:100 DUO (llfllmm per lm, 0.001 inch of various accessories. screw to the approximately-required per 100 inches). In angular terms, position. The ends of the split bubble I interval equals 2.[lt5”. The drum has will be seen. Only a slight turn of the St] intervals. The range is S revolutions. Ergonomically designed, tilting screw is now needed to set the The graduated tilting screw provides the superb to handle line of sight horizontal. geodetic engineer with the perfect means The design and positioning of the controls The time needed to measure the height of carrying 1st-order level lines over wide and reading elements are the result of a difference between two staffs is 25% less rivers and gorges. River crossings can detailed study of the handling of precision than with a standard type of precision now be made with the level itself, the new levels. spirit level. WILD N3. The speed of geodetic levelling with the Control knobs are large and easy to new N3 compares favourably to that with The tilting screw enables the optical- operate with a fine touch. The tilting automatic levels. tooling engineer to measure inclinations screw and micrometer knob are arranged and changes in inclination. It allows the coaxially as are the horizontal clamp and Container N3 to be employed for autocollimation drive screw. The focusing knob has coarse measurements. Measurements can even and fine motion. A rugged, foam-padded container made of high performance synthetic material pro- be taken with the main axis inclined There are two eyepieces side by side. The tects the N3 against weather, bumps, jolts to the vertical. split bubble and micrometer are seen in and shocks. It is bright red to be easily seen. one, the staff image in the other. Separate A screwdriver with adjusting pin, llobust, stable, precise eyepieces ensure that the telescope field of a rainldust cover and the instruction A single casting is used for the telescope booklet are all kept in the container. body and tubular level mount. Covers enclose a space through which air circulates in order to insulate the level and telescope. They are attached in such a way that thermal expansion and contraction H. 1,?-"I3 have no influence. Even the carrying I . handle is fixed at one end only to prevent the warmth of the hand being transferred to the telescope body. These factors, the steel standing axis, the tilting axis of crossed spring plates, the sturdy base and the tubular level, provide the built-in strength and stability that guarantee precision and reliability, year after year in the toughest field conditions, on construction sites and in machine halls.
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Optional eyepieces Accessories for special tasks
Eyepiece I Magnification at various distances ltlllrn it-‘in 2m
For in 25' .2.’-E’ I4 FUKFF 45 as I 21 Foxes es = so 3i
ilutocollimation eyepiece Optional eyepieces Laser eyepiece Fitting the_GClA2 autocollimation The most suitable eyepiece for most With the WILD GLO2 laser eyepiece eyepiece converts the N3 into environments and most applications is fitted, the N3 becomes a laser level an autocollimation instrument. The FUK77, the standard eyepiece for the N3. for alignment control, marking points, inclination and changes in inclination defining horizontal planes, lines FOK53 gives a highermagnification. lt is and grades. of a mirror, or object fitted with sometimes used for alignment tasks in a mirror, are measured with the tilting laboratories or for geodetic levelling when The laser beam coincides exactly with screw. sighting conditions are excellent. the line of sight and is parfocal with the The method is excellent for setting telescope to give a sharp point of laser machine parts and measuring flatness. Diagonal eyepiece light at any position from 3llcm in With a mirror on a 20 cm-long base, front of the cover glass. a change in inclination of one interval The diagonal eyepiece enable the operator to observe through the telescope from If a laser eyepieceis available, it can be of the tilting screw corresponds to a above and from the side. The eyepiece useful to locate an autocollimation image height difference or out-of-flatness of with universal joint can be positioned particularly if the mirror is small or the 2 microns. in any convenient position. distance is long. Autocollimation mirror Translation stage The WILD GAS1 autocollimation mirror The GMT5 translation stage is useful for is an optically flat front-surface mirror of determining lateral displacements when Sflmm diameter in a titanium housing. the N3 is being used for monitoring or for Three holes tapped with an M4 thread in measuring defoi'inutions. The translation the rear of the housing allow the mirror stage can be used with or without tribruch to be attached and adjusted to many types on tripods or mounts. When screwed into of mounts. position. the N3 can he displaced with the micrometer screw within a range of Eyepiece lamp =lUiuin. The micrometer drum is readable The eyepiece lamp transforms the N3 to llllliiini. For further inforniation. into a collimator. Collimators are used please refer to the translation stage flyer as references for measurements and for G1 43?e. checking and adjusting optical instru- 1TlE'.I'itS. The horizontal setting, the tilting mechanism, the precise rotation, and the large objective of the N3, are all valuable features for a collimator.
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_|_| A wide selection of tripods, staffs and scales
Wli.D GPLE invar staffs WILD GWL industrial’ staffs for geodetic levelling and scales for industry, tnnneiling I __i.1-."":'|| | __. 5-._.‘\" .1 '| '1 I -{"1 i\"‘ For top-precision measurements, Nedo and special appiicaticns . 1 1 "'t Iii .1 1 In invar levelling staffs are offered. The |_|.In These invar staffs are designed for ,_\ .|-*' ,_|."' invar strip carrying 1cm graduations has 'f\' 1 industrial applications. However, they are iu 111' "-1. .-, tn. a negligeable coef cient of expansion also used for levelling in restricted spaces .3. '-. (1 micron per 1m per 1°C). It nestles in a -. where the GPLE geodetic staffs would ,.- N. non-distortion aluminium profile on the -‘-T be too long and unwieldy. *1 staff in such a manner that expansion or r='::*- y.I. ‘*1- u *-"1 1 ,1‘ "1 contraction of the staff does not affect the Industrial staffs are lighter than those used 2, ‘L . ,I- ‘\'- for geodetic levelling and the invar strip i graduated strip. To provide a check, the J... \’ i strip carries two sets of graduations, one carries only one set of graduations, either _.-| -1 ll‘ being displaced and numbered differently. 1cm or 0.5 inch as required. There are The staff has a polished steel base and two lengths, 92cm (36 inch) and 182cm should be set up on a Wild ground plate. (72 inch). In order to be fully adaptable to A ring ensures that the same point of the the various set-ups required in industry, base always rests on the bolt of the ground each staff is supplied with two interchange- Wild tripods plate. - able base plates. Another base, with a For geodetic levelling, when the N3 is rectangular mounting surface, is available always set up at eye level, the tripod Invar staffs can on request. GST4i] with rigid legs is recommended. -at-'1 be hand-held, but _- ii for work of the highest The GWL3l] is 30cm long, the GWL6l] For industry, where the instrument ,3: _ accuracy a pair of is 60cm. has to be set at different heights, the tripod - - supporting struts Engineers engaged in industry sometimes GSTZD-9 with telescopic legs will often ‘ii should be used. These manufacture special bases and stands to be more suitable. ' 51 allow the staff to be which scales have to be fitted. Leica can '| turned on the base supply glass scales of various lengths and plate, but without graduations. ~_ touching the struts, as the instrument is moved to the nest 1'". set-up. A circular bubble defines verti- cality. See brochure - 3-". G1 9[l5e.
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1"’ + WILD N3 0 The WILD N3 is a spirit-level instrument
"; for very good reasons: It guarantees the highest precision at all times. In areas woo where strong winds prevail, you can be sure of geodetic results. And in industry, where vibrations and magnetic fields occur, measurements will be precise. I First-order levelling for national control. 0 Precision levelling for engineering. I Deformation measurements and control of structures. I Determining subsidence and monitoring crustal movements. o Checking, aligning and positioning machinery. o Measuring small angles and changes in inclination.
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1|’ Leica std ca-seas Heertlrsgg {Switzerland} Illustrations, descriptions. and technical data arc not binding and may be changed without notice. Teienhone +4! Fl rs 3131 Fax +41 rt rest rs GI l5'io - K192 - Printed in Switzerland Copyrlgltt by Leica .-*'tt“i, Heerbrugg. Swltzerlaiid, lilill Tales 88? 22.2 wi ch