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Automatic Level AT-B2/B3/B4

1. heat 3 22 4 SETTING UP THE COLLIMATORS 4 4 1 COLLIMATOR SYSTEM SETUP 4 1 4 2 INSPECTION OF 4 2 5 INSPECTION AND ADJUSTMENT 5 1 3 1 SUMMARY OF 5 5 1 3 2 INSPECTION AND ADJUSTMENT PROCEDURES 5 3 521 EXTERNAL APPEARANCE CHECK 5 3 5 2 2 ROTATION PARTS FUNCTION CHECK eerte 5 3 5 2 3 TELESCOPE MAGNIFICATION siistin 5 3 524 TELESCOPE APERTURE ES 5 4 52 5 TELESCOPE RESOLVING 5 5 5 2 6 CIRCULAR LEVE G pa edu Pech I e a 5 6 Automatic Level AT B2 B3 B4 Service Manual 52 7 INSPECTION WITH COLLIMATORS PREPARATION c 5 8 5 2 8 MINIMUM FOCUS DISTANCE c ttt 5 9 520 INCLINATION OF RETICLE eatis 5 10 52 10 DINE OF SIGHT 5 11 SP ME A TIO RS 5 12 52 12 SIGHTING AXIS DEVIATION acted e tete d ceres 5 13 5 2 13 ACCURACY OF COMPENSATION TILT RESIDUAL FOR FRONT TO BACK 1500000 5 14 5 2 14 ACCURACY OF COMPENSATION TILT RESIDUAL POR VEEL TO RIGHT TILE 5 15 5 2 15 RANGE OF COMPENSATION FOR FRONT TO BACK TILT 5 17 5 2 16 RANGE OF COMPENSATION FOR LEFT TO RIGHT TILT
2. 5 18 52 17 ECCENTRICITY HORIZONTAL CIRCLE ce 5 21 52 18 HORIZONTAL ACCURACY A 5 22 PR EEO 5 23 6 EXPLODED VIEW NAMES OF PARTS LUBRICATION 6 1 6 1 LEVELLING BASE VERTICAL AXIS 6 3 6 2 FINE MOTION SCREW CIRCULAR LEVEL REFLECTOR 6 4 6 3 OBJECTIVE LENS FOCUSING TUBE PINION UNIT 6 5 6 4 COMPENSATOR RETICLE WITH FRAME 6 6 6 5 TELESCOPE FRAME COVER ettet 6 7 GO EVEPIECE e ossa UR ncn ME M EE E 6 8 6 7 CARRYING CASE STANDARD EQUIPMENT ACCESSORIES 6 9 KAPFENDICES 7 1 SPECIBICATIONS o SR MAD 7 3 Th NAMES OEPARIS 7 5 M TOOLS m d 7 7 IIT GENERAL TOOLS 7 7 erret etse sito erase 7 8 1 1 Automatic Level AT B2 B3 B4 Service Manual 1 INTRODUCTION This service manual describes the replacement inspection and adjustment procedures for the AT B2 AT B3 and AT B4 automatic levels Features e The AT B2 B3 B4 is equipped with a fast action magnetically damped automatic compensator After the instrument has been approximately levelled using the circular level the line of sight is accurately levelled by the automatic compensating mechanism e The AT B2 B3 B4 has been designed to allow stable surveying operations regardless of
3. 5 17 Automatic Level AT B2 B3 B4 Service Manual 5 2 15 RANGE OF COMPENSATION FOR FRONT TO BACK TILT lt Inspection gt 1 Place the test level on the telescope frame and precisely level the instrument observing the bubble of Range 16 or more the test level vial Difference between upper and lower 2 Sight the collimator B If necessary using the bounds instrument reticle adjusting screw align the horizontal reticles 3 Turn the levelling screw 2 in line with the collimator to tilt the instrument in the front to back direction in an elevation angle until the reticle stops going back to the center part i e the compensator stops working Check the tilt angle a of the instrument observing the bubble of the test level vial 4 Check the tilt angle b of the instrument for the other direction in a depression angle in the same manner as the above step 3 5 Check that a and b and the difference between a and b are within the tolerance 25 If the incling stage is used tilt the incling stage observing the bubble of the incling stage level vial Option lt collimator A inclining stage and collimator B instrument levelling screws Fig 5 32 Automatic Level AT B2 B3 B4 Service Manual Adjustment 6 Remove the cover and the compensator cover 7 Adjust the compensator stopper position 7 J p pper p 2 Ensure
4. If the end of the instrument reticle is not aligned with the collimator reticle adjust the instrument reticle adusting screw Fig 5 16 on the following page 2 Turn the horizontal fine motion screw until the end of the right side of the instrument reticle is on the center part of the collimator B reticle Check the displacement of the instrument reticle from the position in the above step 1 Fig 5 13 Adjustment 3 Loosen the 4 eyepiece outer frame screws 1 Turn the eyepiece outer frame to remove half of the displacement 4 Reconfirm adjustment of steps 1 and 2 5 Tighten the eyepiece outer frame screws 1 with torque of 2 4 0 5 kgf cm 0 24 0 05 N m and apply the locking agent S91 to the screws 5 11 Automatic Level AT B2 B3 B4 Service Manual 5 2 10 LINE OF SIGHT Height of the horizontal reticle lt Inspection gt 1 Sight the collimator A and confirm that the instrument is set to the proper height Re level the instrument and sight the collimator A or B mcs range 2 Observe the instrument reticle and tube of 2 approx 45mm the collimator with the right and left eyes in n ji S in vertical turn Keep your eyes horizontal Check if direction the horizontal reticle is within adjusting range as shown in Fig 5 15 If out of the tolerance proceed with the adjustment below collimator Adjustment 3 Remove the reticle cover and
5. 2 Unscrew the 2 cover screws 1 and remove the cover 2 3 Unscrew the 4 compensator cover screws 3 and remove the compensator cover 4 with sealing 4 Unscrew the 3 compensator frame screws 5 5 Remove the compensator complete 6 lt Assembling gt 6 Install the compensator mounting tool 8 on the telescope frame 7 Place the compensator complete 6 along with the compensator mounting tool 8 and tighten the 3 compensator frame screws 5 temporarily at the center of the screw holes 8 Proceed with the inspection and adjustment of the instrument chapter 5 Caution When the compensator unit is replaced for a new one unscrew the 4 stop screws 9 2 screws on each side by En h of one full revolution and apply lac S35 to the screws stop screws are tightened in the compensator supplied as a spare part to prevent the compensator suspension tapes from damages which may occur while the unit is shipped from the factory 3 22 Automatic Level AT B2 B3 B4 Service Manual 3 13 FINDER AT B2 B3 lt Disassembling gt 1 Unscrew and remove the reticle cover with the sealing 2 Unscrew the 2 cover fixing screws 1 and remove the cover 2 3 Loosen the finder set screw 5 and 2 screws 4 4 Pull out the finder from the cover 2 Assembling 5 Insert the finder complete into the cover taking care of the direction the lens of t
6. 8 and reticle ring 7 from the eyepiece outer frame 6 3 20 Automatic Level AT B2 B3 B4 Service Manual lt Assembling gt 7 Apply a small quantity of G38 to the reticle screw 3 and the thread of reticle adjusting screw 5 8 the reticle ring 7 and reticle with frame 8 into the eyepiece outer frame 6 Take care of the facing direction of the reticle with frame 9 Fix the reticle with frame 8 temporarily using the reticle adjusting screw 5 10 Insert and tighten the reticle screw 3 through the spring 4 11 Slip the O ring 9 onto the reticle frame 8 12 Apply a small quantity of G31 to the front surface of the reticle retainer 10 contact surface with the O ring 9 Install the reticle retainer 10 taking care not to jam the O ring 9 13 Confirm that the reticle adjusting screw 5 smoothly turns 14 Apply the locking agent S91 to the 3 points at the reticle retainer 10 and the eyepiece outer frame 6 15 Confirm that there is no stain and dust on the eyepiece lense Relocate the eyepiece complete with the eyepiece outer frame on the telescope frame 16 Proceed with the inspection and adjustment of the instrument chapter 5 3 21 Automatic Level AT B2 B3 B4 Service Manual 3 12 COMPENSATOR The compensator complete for each model AT B2 B3 B4 is different lt Disassembling gt 1 Unscrew the reticle cover 7 with sealing
7. Service Manual 4 2 INSPECTION OF COLLIMATORS Prior to the inspection of the instruments check the collimators A and B if they are in line with each other and horizontal Inspection 1 Remove the illuminator D from the eyepiece of the collimator A Looking through the eyepiece 2 VA of the collimator A move the eyepiece knob back and forth to focus on the reticles of the collimators A and B collimator A 2 Byusing the collimator tilt adjusting screws 3 align the reticle of the collimator A to that of collimator B Relocate the illuminator 3 Place an adjusted automatic level on the instrument support stand and level the instrument collimator A position of leveling collimator B screws reticle image while sighting reticle image while sighting collimator A collimator B collimator B collimator A clamp lever instrument support stand Automatic Level AT B2 B3 B4 Service Manual 4 Sight the 2m reticle of the collimator A and adjust the instrument height to align the horizontal lines of both instrument and collimator reticles Fix the the instrument height by the clamp lever 5 Re level the instrument 6 Sight the collimators A and B to check if the sighting axis of the automatic level is horizontal If any error is observed adjust the horizontal reticle adjusting screw 25 If the collimators and B are not horizontal and the sighting ax
8. environmental conditions such as vibration and temperature changes e The 2 3 4 has a simple horizontal circle for angle measurement and the stadia lines on the reticle can be used for approximate distance measurement e The AT B2 B3 B4 is ideally suited for general survey work civil engineering and construction work e The shortest focus is 0 3m This product is particularly useful for measurement works at narrow places Note The instrument is accurately levelled when the bubble is within the center circle of the circular level unless the precise inspection and adjustment requiring the test level as specified in chapter 5 of this service manual is performed by the service center The following basic differences in specifications feature all models AT B2 AT B3 With micrometer TE 42mm Objective aperture 1 65 in 1 42 in Magnification 32x 28x Field of view 1 20 1 25 at 100m 328ft 2 3m 7 5ft 2 5m 8 2ft Resolving power 3 0 Standard deviation for 1 km of 0 7mm 1 5mm 2 0mm double run leveling 0 03in 0 06in 0 08in Automatic Level AT B2 B3 BA Service Manual Note about the gap between the levelling unit and the vertical axis nut resulting in slight movement of the levelling unit against the telescope frame of the instrument in the vertical direction If you hold the base plate in one hand and apply a force with other hand to move
9. hori i suspended Mirror 2 2 Automatic Level AT B2 B3 B4 Service Manual 2 2 DIAGRAM OF OPTICAL LIGHT PATH focusing lens e reticle conversion lens l 9 al Ke A iva PSE 1 SU WU T S A prism UR RS 771 2 steal eyepiece Automatic Level AT B2 B3 B4 Service Manual 3 DISASSEMBLING AND ASSEMBLING This chapter describes the disassembling and assembling of each unit Follow the procedures in the consecutive order Also use the specified cleaning detergent and grease when needed Cleaning detergents Metal parts white gasoline Plastic parts neutral detergent Glass parts ethyl alcohol 30 and ether 70 Greases and adhesives Specified in the procedure and in chapter 6 Exploded view Gxx denotes the part code for the grease applied to the particular parts of the instruments Sxx or Sxxx denotes the part code for the adhesives 3 1 BASE UNIT lt Disassembling gt 1 Unscrew the 3 levelling screws 14 from the levelling head 15 to separate the base plate unit from the upper part of the instrument 2 Unscrew the vertical axis nut 2 by using the spanner and remove the levelling head unit 15 from the vertical axis 1 3 Remove the C ring 3 using the snap ring pliers Remove the plate A 4 wave washer 5 plate A 6 worm wheel 7 and washer B 8 fro
10. horizontal reticle is going back to the collimator horizontal reticle 25 To tilt the instrument in more simple way the levelling base can be turned 90 on the instrument support stand in advance While the 2 levelling screws i e the line passing through the center of the levelling screws are set parallel to the optical axes of the collimators the levelling screw 1 7 Fig 5 36 can be used to incline the instrument in the left to right direction If the inclining stage ST RA 03 is used tilt the stage with the instrument in the direction perpendicular to the optical axes of the collimators direction until the reticle stops going back to the center part i e the compensator stops working as observed against the collimator B horizontal reticle Confirm the tilt angle a by checking the bubble position of the inclining stage level vial Next tilt the inclining stage with the instrument in the direction perpendicular to the optical axes of the collimators direction until the reticle stops going back to the center part as observed against the collimator B horizontal reticle Confirm the tilt angle b by checking the bubble position of the inclining stage level vial Check that a and b and the difference between a and b are within the tolerance Option 2 collimator A inclining stage collimator B Fig 5 37 5 20 Automatic Level AT B2 B3 B4 Service Manual lt If out of th
11. the view field 3 When the resolving power is out of the tolerance check that there is no dust and dirt on the optical parts of the instrument Check if the optical units are the correct parts for the instrument Automatic Level AT B2 B3 B4 Service Manual 5 2 6 CIRCULAR LEVEL Inspection 1 2 3 4 5 6 Place the test level 1 on the instrument Center the level vial by using the adjusting screw 2 of the test level Rotate the telescope frame 180 When the level vial is out of center correct half of the displacement using the levelling screws 3 and 4 and another half with the adjusting screw 2 of the test level Rotate the telescope frame 90 When the level vial is not centered correct the displacement using the levelling screw 5 Repeat steps 3 to 6 to center the level vial at any direction of the telescope frame 7 Check the position of the circular level vial Adjustment 8 Using the hexagonal wrench 2mm center the circular level vial with the 2 adjusting screws 6 7 The level vial moves with the adjusting screw 6 or 7 parallel OC ep J Automatic Level AT B2 B3 B4 Service Manual Optional adjustment without test level Adjust the levelling screws to center the bubble in the circular level 2 Turn the instrument 180 or 200 gon If the bubble is inside the circle no adjustment is necessary If the
12. Screwdrivers 13 Mascot hammer 3 Torque driver 14 Plastic bar 4 Dust blower 15 Dynameter 5 Adjusting pin 16 Pliers 6 Brush 17 Hexagonal wrench 0 89mm 1 5mm 2mm 2 5mm 7 Hole brush 18 Inspection chart S94 8 Alcohol fountain 19 Grease G21 G30 G31 G32 G33 G38 G42 9 Lens tissue 20 Adhesive Three Bond 1401C S91 10 Tweezers Three Bond 1401 S102 Loctite 262 S112 11 Spanner silicone KE3475T S138 Cemedine 1500 S113 Loctite 460 S111 shellac lac S35 Automatic Level AT B2 B3 B4 Service Manual 2 SPECIAL TOOLS Conversion lens mounting tool S055 004 Compensator mounting tool 8055 002 Stadia nut mounting tool S055 003 Test level 8055 001 Vertical axis mounting tool 8055 006 Inclining stage ST RA 03 Note it can be used optionally with the test level 4 to tilt the instrument for the inspection of the automatic compensation accuracy and range NOB WNW TOPCON CORPORATION 75 1 Hasunuma cho ltabashi ku Tokyo 174 8580 Japan www topcon co jp
13. bubble shifts from within the circle adjust as follows 3 Compensate for one half of the shift by adjusting the levelling screws 4 Eliminate the remaining half shift with the circular level adjusting screws using the hexagonal wrench 5 Turn the instrument 180 or 200 gon If the bubble remains in the circle adjustment is complete levelling screws Fig 5 8 adjusting screws Fig 5 9 Automatic Level AT B2 B3 B4 Service Manual 5 2 7 INSPECTION WITH COLLIMATORS PREPARATION Prepare the following tools e Collimator system e Inclining stage optional equipment 1 Level the collimators A and B and align their optical axes section 4 2 page 4 2 2 Place the AT B2 B3 B4 on the instrument support stand so that one of the levelling screws is pointing towards collimator A Bring the instrument to the collimator height and tighten the fixing clamp collimator A position of levelling collimator B screws collimator B inspected level collimator A clamp lever instrument support stand 5 9 Automatic Level AT B2 B3 B4 Service Manual Option To check the accuracy and range of the compensator the test level 8055 001 can be used optionally the inclining stage ST RA 03 can be applied If the inclining stage is available by the service center it is recommended to use it taking into consideration the convenience of its operation Place the
14. conversion lens with the hole facing up Fig 3 26 7 Relocate the focusing tube and pinion 27 section 3 8 page 3 13 8 Relocate the objective lens section 3 7 page 3 11 9 Relocate compensator section 3 12 page 3 21 10 Proceed with the inspection and adjustment of the instrument chapter 5 Automatic Level AT B2 B3 B4 Service Manual 3 10 EYEPIECE The eyepiece of the AT B2 is detachable and different from those of AT B3 and AT B4 AT B2 lt Disassembling gt 1 2 3 4 5 6 7 Unscrew the reticle cover 1 with the sealing Unscrew the eyepiece complete by rotating counterclockwise Turn the eyepiece knob 2 fully clockwise Loosen the 2 eyepiece knob set screws 3 Remove the eyepiece knob 2 from the eyepiece lens frame 4 Remove the eyepiece lens frame 4 together with the O ring 6 from the eyepiece frame 11 Unscrew the eyepiece lens nut 10 from the eyepiece lens frame 4 Remove the eyepiece lens D 9 spacer 8 lens E 7 and sealing 5 from the eyepiece lens frame 4 25 If necessary remove the eyepiece sealing 12 from the eyepiece outer frame 13 and replace for a new one eyepiece complete Fig 3 27 3 16 Automatic Level AT B2 B3 B4 Service Manual lt Assembling gt 8 Put the sealing 5 lens E 7 spacer 8 and lens D 9 into the eyepiece lens frame 4 take care of the
15. inclining stage on the instrument support stand in this manner that one of the test level vials is parallel to the optical axes of the collimators another one is perpendicular to the optical axes Place the AT B2 B3 B4 on the inclining stage so that one of the levelling screws is pointing towards collimator A Bring the instrument to the collimator height and tighten the fixing clamp collimator collimator B position of inclining stage and instrument levelling screws Fig 5 11 5 2 8 MINIMUM FOCUS DISTANCE Inspection 1 Place the instrument on the collimator support Tolerance stand Bring the unit to the collimator A 0 3m or less height and tighten the fixing clamp Level the instrument 2 Place an object scale etc at a distance of 0 3m from the instrument center Turn the focusing knob and check if the instrument can be focused on the object 3 Focus the instrument to infinity and confirm that the focusing knob has a proper amount of play Caution The focusing range is determined by the engagement of the pinion focusing knob with the focusing tube section 3 8 page 3 13 Automatic Level AT B2 B3 B4 Service Manual 5 2 9 INCLINATION OF RETICLE Inspection Tolerance 5 or less 1 Sight the collimator B Turn the horizontal fine motion screw until the end of the left side of the instrument reticle is on the center part of the collimator B reticle
16. the circular level 4 O ring 2 and circular level spring 3 Assembling S Slip the O ring 2 and the circular level spring 3 take care of the upside down to the circular level 4 25 spring at the center hole location should touch the cricular level frame not telescope frame before the screw is tightened 6 Apply G31 to the O ring 2 7 Fit the circular level 8 Slightly tighten the circular level frame screw 5 9 Apply a small quantity of G38 at the lower side of the 2 circular level adjusting screw heads 1 and slightly tighten the screws 10 Tighten the circular level frame screw 5 with torque of 4 5 kgf cm 0 45 N m 11 Apply G38 to the vertical axis 12 Tighten the vertical axis nut to put together the telescope frame and base unit 13 Proceed with the inspection and adjustment of the instrument chapter 5 3 8 Automatic Level AT B2 B3 B4 Service Manual 3 6 REFLECTOR lt Disassembling gt 1 Pressing the reflector cover 1 from both sides remove the reflector cover 1 2 Unscrew the 2 reflector frame screws 2 to remove the reflector frame 3 3 Remove the tape 6 from the reflector frame AT B2 4 Remove the penta prism 4 from the reflector frame 3 AT B3 B4 5 Remove the reflector 5 from the reflector frame 3 lt Assembling gt AT B2 6 When the new reflector frame 3 is used break the reflector holde
17. 1 Place the test level 1 7 Fig 5 22 on the AT B2 5 or less telescope frame and precisely level the instrument AT B3 10 or less observing the bubble of the test level 1 vial AT B4 10 or less 2 Sight the collimator B If necessary using the instrument reticle adjusting screw align the horizontal reticles 3 Turn the levelling screw 2 in line with the collimator A to tilt the instrument 15 in the front to back direction observing the bubble of the test level vial Check if the displacement of the reticle is within the tolerance 4 Tilt the instrument 15 in the same manner as the above step 3 Check the displacement ot the instrument reticle If the incling stage is used tilt the incling stage observing the bubble of the incling stage level vial Option lt Bee collimator A inclining stage and collimator B instrument levelling screws Fig 5 23 Automatic Level AT B2 B3 B4 Service Manual Adjustment 5 Remove the cover and the compensator cover section 3 12 page 3 21 6 Install the compensator mounting tool 5 on the telescope frame Loosen the 3 compensator frame screws 3 Move the compensator complete along the tool back and forth to remove the displacement at a 15 7 Tighten the compensator frame screws with torque of 2 4 0 5 kgf cm 0 24 0 05 Caution When the compensator is moved to the objective lens s
18. 4 Magnification 32x 28x Field of view 1 20 1 25 at 100m 328ft 2 3m 7 5ft 2 5m 8 2ft Resolving power 3 0 3 5 4 0 Minimum focus 0 3m 1ft Stadia ratio 1 100 Additive constant 0 Horizontal circle Diameter 103mm 4 1 Graduation 1 1gon Automatic compensator Range 15 Circular level Sensitivity 10 2 Standard deviation for 1 km of double run leveling 0 7mm 1 5mm 2 0mm 0 03in 0 06in 0 08in Pesce 0 02in IPx6 IEC60529 2001 Operating temperature range 20 to 50 C 4 to 122 F Storage temperature range 40 to 70 C 40 to 158 F Size Width 130mm 5 12in Length 215mm 8 46in Height Weight 1 85kg 1 7kg 4 1165 3 7165 Automatic Level AT B2 B3 B4 Service Manual T 5 Automatic Level AT B2 B3 B4 Service Manual II NAMES OF PARTS Instrument shown AT B2 Lens hood AT B2 only Prism AT B2 Reflector AT B3 B4 Peep sight Circular level adjusting screw Circular level Leveling foot screw Base plate The AT B4 has a gun sight The AT B2 eyepiece is detachable Horizontal fine motion screw Objective lens Focusing knob Horizontal circle positioning ring Horizontal circle window Reticle adjusting screw cover Eyepiece 7 6 Automatic Level AT B2 B3 B4 Service Manual Automatic Level AT B2 B3 B4 Service Manual TOOLS 1 GENERAL TOOLS 1 Screwdrivers 12 Snap ring pliers 2
19. Af TOPCON AUTOMATIC LEVEL _AT B2 B3 B4_ TOPCON CORPORATION NOTICE This document contains proprietary and confidential information of Topcon Corporation and its description is protected under copyright law and international conventions Any unauthorized use duplication reproduction modification disclosure distribution or transfer of any part of this document is strictly prohibited Copyright 2010 Topcon Corporation All rights reserved Automatic Level AT B2 B3 B4 Service Manual Table of Contents Te INTRODUCTION oi ist eben foede 1 1 2 OPTICAL COMPONENTS LAYOUT 2 1 2 1 PRINCIPLE OF AUTOMATIC LEVEL 2 1 2 2 DIAGRAM OF OPTICAL LIGHT PATH 2 2 3 DISASSEMBLING AND ASSEMBLING 3 1 SIJASEDNIT co EMI 3 1 3 2 FINE MOTION SCREW 2 2 2 2 4 000000024400000000 3 4 3S VERTICALAAXIS cuta oma qaae 3 5 3 6 3S5 CIRCULAR timidis 3 7 CT OR ocelot aie neo ote 3 8 37 OBJECTIVE LENS uos eka 3 10 3 8 FOCUSING TUBE AND 3 12 3 9 CONVERSION LENS c countess ann Up 3 14 30 E VE PIECE nei aestu n ania 3 15 FIERE TICLE eae re entier ue 3 19 342 COMPENSATOR 3 21 SIS FINDER
20. B4 lt Disassembling gt 1 Remove the objective lens from the telescope frame section 3 7 page 3 10 2 Remove the pinion knob cover 5 3 Loosen the 2 pinion set screws 4 Pull out the pinion 6 from the telescope frame 4 Pull out the focusing tube from the 3 from the telescope frame 5 When replacing the rack 2 on the focusing tube remove the 2 rack screws 1 Automatic Level AT B2 B3 B4 Service Manual Assembling 6 7 8 9 10 11 12 13 14 15 16 17 When the rack 2 is removed tighten the 2 rack screws pressing the rack 2 downward and backward in the eyepiece direction Apply the locking agent S91 to the fixing screws Apply G38 to the cogs and the upper surface of the rack 2 Apply G42 AT B2 or G30 AT B3 B4 to the surface inside the telescope tube for the focusing tube Insert the focusing tube 3 to the telescope frame Fit the cogs of the rack 2 and pinion 6 Turn the pinion 6 so that the focusing tube 3 moves all in the direction of the objective lens Getting out of gear turning the focusing tube counterclockwise adjust the focusing tube 3 position so that the edge of the focusing tube 3 is level with the rim for the objective lens inside the telescope frame Tighten the 2 pinion set screws Put the pinion knob cover 5 on the pinion knob 6 G42 AT B2 G30 AT B3 B4 Check if th
21. Oring 4 2 sealing compensator cover 4 12 w frame AT B2 4 3 screw 2 5x8 0mm 4 13 w frame AT B3 B4 4 4 compensator complete AT B2 4 14 reticle ring AT B2 4 5 compensator complete AT B3 4 15 reticle ring AT B3 B4 4 6 compensator complete AT B4 4 16 adjusting screw reticle AT B2 4 7 screw 2 5x8 0mm 4 17 adjusting screw reticle AT B3 B4 4 8 balancer t 0 3mm 4 18 screw 4 9 balancer t 0 4mm 4 19 reticle spring 4 10 reticle retainer To preserve the instrument water resistance change the cover sealing section 6 5 page 6 7 illustration No 5 10 every time when the compensator cover with sealing is removed and attached to the telescope frame Automatic Level AT B2 B3 BA Service Manual 6 5 TELESCOPE FRAME COVER 91 do not apply 91 Three Bond glue outside Three Bond this line 1401C A 7 A Isi 54 7 Pd 27 8m 5 13 x Say SN C Cis SS gt IOP COIN 5 1 2 3 5 6 screw 2 0x3 0mm 2 3 5 2 screw 2 5x6 0mm 5 7 screw 2 0x3 0mm AT B2 B3 5 3 AT B2 name plate 5 8 cover AT B4 5 4 AT B3 name plate 5 0 AT B4 name plate 5 5 finder complete AT B2 B3 5 10 sealing cover TOPCON labels with serial number for AT B2 B3 B4 illustration No 5 11 5 12 and 5 13 are not supplied as the spare parts While installing the cover push it d
22. adjust the reticle adjusting screw 1 using the adjusting pin Caution 4 During the above inspection keep your eyes horizontal Horizontality of the line of sight Inspection 5 Sight the collimator A or B infinity reticle and check the error Adjustment when the error is within 30 6 Remove the reticle cover and adjust the reticle adjusting screw 1 Fig 5 16 to align the reticles Adjustment when the error is more than 30 7 Remove the cover and the compensator cover 8 Slightly loosen the prism frame fixing screw 2 5 12 9 10 11 12 Automatic Level AT B2 B3 B4 Service Manual Adjust the prism frame adjusting screw 1 to have the sighting axis horizontal 30 Tighten the prism frame fixing screw 2 with torque of 1 2 0 3 kgf cm 0 12 0 03 N m and reconfirm that the line of sight is still horizontal Apply the locking agent S91 to the screws 1 and 2 Relocate the compensator cover and install the cover on the telescope frame if the compensator accuracy and range is to be inspected and adjusted as described is sections 5 2 13 5 2 16 reassemble the instrument later after final checking Adjust the reticle adjusting screw to align the reticles and reconfirm the inclination of the reticle section 5 2 9 5 2 11 STADIA RATIO lt Inspection gt Tolerance 1 2 25 The width of the Topcon s collimator reticle lines lt Adju
23. d temporary tighten the 3 screws 20 fixing the base plate 19 and levelling screw retainer 16 with torque of 1 2 kgf cm 0 12 N m 16 Apply a small quantity of G33 to the contact surfaces of the levelling head 15 and horizontal circle 12 Excessive appliance of the grease results in the increase of the rotation torque 17 Place the horizontal circle ring 13 between the horizontal circle 12 and the levelling head 15 Put together the horizontal circle 12 and levelling head 15 18 Slip the worm wheel spring 11 and plate A 10 to the levelling head 15 Fix the C ring 9 using the snap ring pliers Install the plate A 10 and the C ring C 9 with the smooth edges i e press punch side facing down 3 3 Automatic Level AT B2 B3 B4 Service Manual 19 Apply G38 to the upper side of the C ring 9 20 Apply G21 to the cogs of the worm wheel 7 Apply G38 to the worm wheel 7 to the surfaces which are in contact with the washer A 6 and levelling head tube 15 21 Put the washer B 8 worm wheel 7 plate A 6 wave washer 5 and plate A 4 Fix the C ring 3 Install the washer B 8 and C ring 3 with the smooth edges i e press punch side facing up and the plate A 6 with the smooth edges i e press punch side facing down The plate A 4 can be placed in any direction 22 Apply G38 to the vertical axis 23 Apply G38 to the upper surface of the vertical ax
24. e 30 0mm Magnification 30 0 1 0 30 1 The minimum graduation of the dynameter is 0 1 mm 2 When the magnification is out of tolerance check the objective lens and eyepiece lens if they are correct parts for the instrument 5 2 4 TELESCOPE APERTURE Proceed with this inspection after checking 5 2 3 Telescope Magnification in succession 1 Confirm that the telescope is focused to the infinity oo 2 Place the dynameter on the eyepiece Looking through the dynameter measure the visual field with the scale of dynameter 3 Calculate the tolerance tolerance A x C DyD x 100 A magnification calculated in section 5 2 3 C reading of the dynameter scale measured in the above step 2 D objective lens aperture in the specifications 4 When the telescope aperture is out of the tolerance check the objective lens if it is correct part for the instrument dynameter tool Tolerance 10 dynameter tool Fig 5 3 Automatic Level AT B2 B3 B4 Service Manual 5 2 5 TELESCOPE RESOLVING POWER 1 Place an inspection chart for the resolving Tolerance power 3 3 5 4 at an equivalent distance AT B2 3 or less to the stripes on the chart AT B3 43 5 or less 2 Looking through the eyepieces observe AT B4 4 less the vertical horizontal and oblique stripes to check if every stripe can be recognized at the center of the view field i e within circle of one half of
25. e focusing tube runs smoothly inside telescope frame Make sure that in the limit position the focusing tube is aligned with the rim for the objective lens inside the telescope frame or it is slightly below the rim i e in the direction to the inside of the telescope tube Install the objective lens complete section 3 7 page 3 11 Proceed with the inspection and adjustment of the instrument 4 chapter 5 end position for focusing lens Fig 3 23 Automatic Level AT B2 B3 B4 Service Manual 3 9 CONVERSION LENS The conversion lens of the AT B2 is different from those of AT B3 B4 lt Disassembling gt 1 Remove the objective lens complete section 3 7 page 3 10 2 Remove the focusing tube and pinion section 3 8 page 3 12 3 Remove the compensator section 3 12 page 3 21 4 Unscrew the 2 conversion lens tube screws 3 Pull out the conversion lens 1 or 2 from the objective lens side 1 conversion lens for AT B2 2 conversion lens for AT B3 B4 lt Assembling gt 5 Insert the conversion lens mounting tool A 4 from the objective lens side to the telescope frame 6 Insert the conversion lens 1 or 2 to the telescope frame Pressing the conversion lens 1 or 2 with the tool B 5 tighten the 2 conversion lens tube screws 3 Apply the locking agent S91 to the screws 1 conversion lens for AT B2 2 conversion lens for AT B3 B4 install the
26. e instrument are clean Check the painted and plastic parts for any damages scratches etc 2 Confirm that the optical units are clean objective lens eyepiece inner optical parts as seen through the objective lens 5 2 2 ROTATING PARTS FUNCTION CHECK 1 Check to confirm smoothness of rotation of the AT B2 B3 B4 units focusing knob eyepiece knob horizontal fine motion screw and levelling screws The rotation torque for the levelling screws as checked in the factory by using the special tension gauge is 0 35 0 50N 35 50gf 2 Turn the telescope to verify smooth rotation of the vertical axis If any abnormality is supposed to occur confirm the vertical axis torque within standard 150g 280g Check the torque inspecting the telescope at the eyepiece 5 2 3 TELESCOPE MAGNIFICATION 1 Focus the instrument on the infinity oo Tolerance reticle of the collimator 59 a5 2 Attach the dynameter tool 1 on the eyepiece and focus on the tool scale 3 Place a scale 2 on the objective lens Measure the reading of the scale I corresponding to the reading of the dynameter E 4 Calculate the telescope magnification I E 5 Calculate the tolerance A B B x 100 A Magnification calculated in the above step 3 B Magnification in the specification 2 9 N 23 Fig 5 1 5 4 Automatic Level AT B2 B3 B4 Service Manual Example Dynameter 10 graduations 1mm Scal
27. e tolerance If the range of compensation is out of the tolerance adjust the compensator stopper position Ensure that the pin does not touch the side of the stopper Keep a gap equally on both sides pus 2 Iif necessary also confirm setting of the compensator 7 OD Y distance stop screws as described in section 3 12 page 3 21 2 d Recheck the range of compensation in the front to ZZ back direction section 5 2 15 Tighten the 2 stopper fixing screws with torque of 1 2 0 3 kgf cm 0 12 0 03 N m and apply the locking agent S91 to the screws stopper stopper pin 6 Relocate the compensator cover with sealing Tighten the compensator cover fixing screws 4 pcs with torque of 1 5 0 1 kgf cm 0 15 0 01 N m Apply the locking agent S91 to the compensator cover fixing screws Caution To preserve the instrument water resistance change the cover sealing section 6 5 page 6 7 illustration No 5 10 every time when the compensator cover with sealing 1s removed and attached to the telescope frame 7 Relocate the cover and apply the locking agent S91 to the cover fixing screws 2 pcs 5 21 Automatic Level AT B2 B3 B4 Service Manual 5 2 17 ECCENTRICITY OF HORIZONTAL CIRCLE 1 2 3 4 5 6 7 8 9 10 11 Level the instrument and sight one of the collimators Tolerance collimator A 15 or less Turn the hori
28. elescope frame from the focusing knob side Fit the hook of coil spring 6 in the channel of the fine motion shaft and attach the coil spring to the fixing screw 6 Tighten the screw and apply the locking agent S91 to the screw Insert the worm metal B 5 w guide channel spring washer 4 and screw the fine motion knob 3 Tighten the fine motion knob set screw 2 Put the fine motion knob cover on the fine motion knob Apply G38 to the vertical axis Tighten the vertical axis nut to put together the telescope frame and base unit Proceed with the inspection and adjustment of the instrument chapter 5 Automatic Level AT B2 B3 B4 Service Manual VERTICAL AXIS lt Disassembling gt 1 Unscrew the vertical axis nut and remove the base unit from the telescope frame 7 section 3 1 page 3 1 2 Fix the vertical axis 1 on the vertical axis mounting tool 2 using a parallel bench vice 3 Turn the telescope frame counterclockwise to remove the vertical axis Since the vertical axis is glued to the telescope frame warm up the vertical axis when having difficulty in turning the telescope frame Caution Do not use the removed vertical axis lt Assembling gt 3 Apply adhesive S112 to the screw part of the vertical axis 1 Screw the vertical axis 1 to the telescope frame using the vertical axis mounting tool 2 4 Apply G38 to the vertical axis 1 5 Tighten the vertica
29. en parts of the reflector complete are removed and assembled replace the double sided adhesive tape illustration No 2 16 for a new one 6 5 Automatic Level AT B2 B3 BA Service Manual 6 3 OBJECTIVE LENS FOCUSING TUBE PINION UNIT 3 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 3 11 3 12 torque 0 45N m 4 5kgf cm AT B2 S91 3 6 Three Bond ae 1401C telescope cap sunshade AT B2 objective lens frame cover objective lens outer frame AT B2 objective lens outer frame AT B3 B4 screw 2 5x30 0mm objective lens complete AT B2 objective lens complete AT B3 objective lens complete AT B4 stadia adjusting nut AT B2 O ring focusing tube complete AT B2 3 13 3 14 3 15 3 16 3 17 3 18 3 19 3 20 3 21 3 22 3 23 AT B3 B4 AT B2 91 138 Three Bond Silicone glue KE3475T 3 18 3 12 3 19 3 13 Three Bond 1401C focusing tube complete AT B3 B4 rack screw 2 0x4 0mm conversion lens complete AT B2 conversion lens complete AT B3 B4 pinion complete AT B2 pinion complete AT B3 B4 cover pinion knob screw 2 0x4 0mm screw 2 0x3 0mm screw 2 0x3 0mm AT B3 B4 Automatic Level AT B2 B3 B4 Service Manual 6 4 COMPENSATOR RETICLE WITH FRAME S91 Three Bond torque 0 15 0 01N m 1 5 0 1kgf cm 91 91 2 Three Bond gt 1401 torque 0 24 0 05N m 2 4 0 5kgf cm 4 compensator cover 4 1
30. es the part code for the grease applied to the particular parts of the instruments Sxx or Sxxx specifies the part code for the adhesives 6 1 LEVELLING BASE VERTICAL AXIS 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 1 9 vertical axis C ring plate A wave washer worm wheel washer B plate spring worm wheel horizontal circle complete 360 ring horizontal circle 1 10 1 11 1 12 1 13 1 14 1 15 1 16 1 17 1 18 102 Three Bond 1401 levelling head vertical axis nut levelling screw complete levelling screw retainer levelling screw pad base plate levelling screw plate screw 3 0x6 0mm horizontal circle complete 400g Automatic Level AT B2 B3 B4 Service Manual 6 2 FINE MOTION SCREW CIRCULAR LEVEL REFLECTOR S91 Three Bond AT B2 642 1401C AT B3 B4 G30 torque 0 1N m 1kgf cm 5111 Loctite Cemedine 1500 Three Bond torque 1401C 0 45N m 4 5kgf cm 2 1 telescope frame 2 11 reflector frame 2 2 indicator 2 12 screw 2 0x8 0mm 2 3 circular level complete AT B2 2 13 penta prism AT B2 2 4 circular level complete AT B3 B4 2 14 reflector AT B3 B4 2 5 circular level vial AT B2 2 15 reflector cover 2 6 circular level vial AT B3 B4 2 16 tape reflector 2 7 Oring 2 17 worm complete 2 8 circular level spring 2 18 fine motion knob cover 2 9 screw 2 5x10 0mm 2 19 coil spring worm 2 10 screw 2 5x10 0mm 2 20 screw 2 0x4 0mm Wh
31. facing direction of the lens D and E 9 Install the eyepiece lens nut 10 into the eyepiece lens frame 4 to fix the lenses 10 Apply G32 to the O ring 6 and eyepiece lens frame 4 11 Screw the eyepiece lens frame 4 fully clockwise to the eyepiece frame 11 12 Fit the eyepiece knob 2 and tighten the 2 set screws 3 13 Apply G31 to the eyepiece sealing 12 and screw the eyepiece complete into the eyepiece outer frame 13 eyepiece complete 14 Apply G31 to the sealing of the reticle cover 1 15 Proceed with the inspection and adjustment of the instrument chapter 5 3 17 Automatic Level AT B2 B3 B4 Service Manual AT B3 B4 The eyepiece lens D 10 eyepiece lens E 8 and eyepiece knob 3 of the AT B3 are different from those of the AT B4 lt Disassembling gt 16 Unscrew the reticle cover 1 with the sealing 17 Remove the eyepiece knob cover 2 18 Turn the eyepiece knob 3 fully clockwise and loosen the 2 set screws 4 19 Remove the eyepiece knob 3 from the eyepiece lens frame 5 20 Unscrew the eyepiece lens frame 5 together with the O ring 7 from the eyepiece outer frame 13 21 Unscrew the eyepiece lens nut 11 from the eyepiece lens frame 5 22 Remove the eyepiece lens D 10 spacer 9 lens E 8 and sealing 6 from the eyepiece lens frame 5 25 If necessary unscrew the 4 screws fixing the eyepiece o
32. he finder is the eyepiece side 6 Tighten the finder set screw 5 to fix the finder 7 Apply the locking agent S91 to the finder set screw 5 8 Relocate the cover 2 and tighten the 2 cover screws 1 Apply the locking agent S91 to the screws 9 Apply G31 to the reticle cover sealing and install the reticle cover 10 Proceed with the adjustment of the finder section 5 2 19 page 5 23 4 1 Automatic Level AT B2 B3 B4 Service Manual 4 SETTINGUP THE COLLIMATORS 4 1 COLLIMATOR SYSTEM SETUP The collimator system is the equipment which can be used to inspect the vertical axis the horizontal axis the sighting axis the level axis of the instruments Standard collimator system recommended by the JSIMA114 2002 Guideline for the Checks and Adjustments of the Collimator System for Surveying Instruments comprises of the 4 collimators The 2 of them are installed for the level lines A B and the other two C D are installed above and below the collimator B Infinite oo parallel rays are obtained through the collimators Non infinite rays are also available from the collimator A Collimators A and B optical axes are aligned in a straight line and remain level Collimators C and D are mounted at 30 in elevation and in depression respectively in the same vertical plane collimator C collimator B collimator A collimator D instrument support stand Automatic Level AT B2 B3 BA
33. ide the tilt residual changes to the minus direction at 15 plus direction at 15 If the compensator does not work at 15 adjust the compensator stopper position 6 7 section 5 2 15 25 If the compensator accuracy cannot be adjusted within the tolerance attach the balancer s Fig 6 4 page 6 6 to the damping plate of the compensator mirror frame 5 2 14 ACCURACY OF COMPENSATION TILT RESIDUAL FOR LEFT TO RIGHT TILT lt Inspection gt Tolerance at 15 1 Place the test level on the telescope frame and AT B2 5 or less precisely level the instrument observing the bubble of AT B3 10 or less the test level vial AT B4 x10 or less 2 Sight the collimator B Using the instrument reticle adjusting screw align the horizontal reticles 2 3 Turn the telescope frame 90 and rotate the 2 levelling screws 1 and 3 Fig 5 25 by the same amount in the opposite rotation directions to tilt the instrument 15 in the left to right direction observing the bubble of the test level vial Then resight the collimator B if necessary turn the levelling screw 2 to relevel the instrument in the front to back direction and recheck the left to right direction Automatic Level AT B2 B3 B4 Service Manual 4 Resight the collimator B Check if the displacement of the reticle 15 within the tolerance 5 Tilt the instrument 15 in the left to right direction using
34. is nut 2 and tighten the nut to put together the base unit and telescope frame 24 Adjust the 3 screws 20 fixing the base plate 19 and levelling screw retainer 16 so that the 3 levelling screws can be smoothly rotated with the same torque 25 Apply the locking agent 8102 to the tips of the screws 20 at the upper side of the levelling screw retainer 16 26 Proceed with the inspection and adjustment of the instrument 4 chapter 5 3 4 Automatic Level AT B2 B3 B4 Service Manual 3 2 FINE MOTION SCREW UNIT lt Disassembling gt 1 2 3 4 lt Assembling gt 5 6 7 8 9 10 11 12 13 Unscrew the vertical axis nut and remove the base unit from the telescope frame section 3 1 page 3 1 Remove the fine motion knob cover 1 from the fine motion knob 3 Loosen the fine motion knob set screw 2 and unscrew the fine motion knob 3 Loosen the coil spring screw 6 and remove the coil spring hook from the screw Undo the coil spring 6 from the channel of the fine motion shaft and pull out the worm complete 8 from the telescope frame Apply G21 to the cogs of the worm complete apply G32 to the channel of the fine motion shaft and the ends of the fine motion shaft Apply G32 to the worm metal B 5 and front surface which 1s in contact with the spring washer 4 of the fine motion knob 3 Insert the fine motion shaft to the t
35. is of the automatic level is horizontal the errors are symmetrically reversed when sighting the collimator A and then B 7 Using the reference automatic level confirm the horizontality of the collimators A and B lt Adjustment gt 8 Sight the collimator B with the adjusted automatic level and observe the horizontal lines of the intrument and collimator reticles 9 By using the collimator B tilt adjusting screws align the horizontal reticles 10 Repeat steps from 1 to 7 to complete adjustment 4 4 Automatic Level AT B2 B3 BA Service Manual 5 5 1 Automatic Level AT B2 B3 B4 Service Manual INSPECTION AND ADJUSTMENT 5 1 SUMMARY OF INSPECTION nspection recommended for the new instruments as a pre delivery check In the table below collimator A is the collimator equipped with the 2m or 3m 5m and 10m distance reticles and including the infinity oo reticle with stadia lines collimator B is the horizontal collimator with the infinity oo reticle Specification Inspection Item Inspection Procedure AT B2 AT B3 AT B4 Confirm visually that the optical units 81 External appearance m and the outer sections of the check instrument are clean without damages dust and dirt UN Confirm smoothness of 2 sm 5 rotation movement of the instrument parts function check units 3 Magnification 590 1256 015 the objec ve lens and read the sca
36. l axis nut to put together the telescope frame and base unit 6 Proceed with the inspection and adjustment of the instrument 4 chapter 5 Automatic Level AT B2 B3 B4 Service Manual 3 4 INDICATOR lt Disassembling gt 1 Unscrew the vertical axis nut and remove the base unit from the telescope frame section 3 1 page 3 1 2 Remove the indicator 1 from the telescope frame 2 using the pliers lt Assembling gt 3 Clean the contact surface for the indicator on the telescope frame 4 Apply adhesive S111 to the surface 5 St ck the indicator on the telescope frame so that both surfaces are even 6 Apply adhesive S113 at the left and right side of the indicator and contact surface of the telescope frame Make sure that the glue does not come outside the groove area of the telescope frame i e the surface is clean 7 Apply G38 to the vertical axis 8 Tighten the vertical axis nut to put together the telescope frame and base unit 9 Proceed with the inspection and adjustment of the instrument chapter 5 Automatic Level AT B2 B3 B4 Service Manual 35 CIRCULAR LEVEL lt Disassembling gt 1 Unscrew the vertical axis nut and remove the telescope frame from the base unit section 3 1 page 3 1 2 Unscrew the 2 circular level adjusting screws 1 3 Turn the telescope frame upside down and unscrew the circular level frame screw 5 4 Remove
37. le using dynameter Focus the telescope to infinity oo do sieben 42mm 36mm 932 Measure the field of view using 10 10 10 dynameter and multiply it by the magnification 5 Resolving power 2 a OF Use the resolution test chart less less less After levelling in one position turn the 6 Circular level instrument 180 and confirm the bubble centering Sight the target at a distance of 0 3m 7 Minimum focus 0 3m or less and confirm that the image is sharply focused Inclination of reticle 8 and horizontality of 5 or less Check sighting collimator B line of sight 9 Stadia ratio the cedia nes sighing collimator A Subinde sir Focus on collimator A 2m 5m and 10 gnung 0 0 3mm or less 10m reticles and read the difference in deviation less reticle graduations in vertical direction 5 2 Automatic Level AT B2 B3 B4 Service Manual Inspection Item Specification AT B2 AT B3 AT B4 Inspection Procedure Automatic Sight collimator B and tilt the compensation accuracy 45 410 instrument 15 in front to back Ho To Hips 0006 direction Check horizontality of line front to back tilt of sight Sight collimator B and tilt the Automatic 2t 5 t b 2 instrument 15 in left to right 12 compensation accuracy 5 or less 10 or less pin 1 QNI MD direction Check horizontality of line left to right tilt 2
38. m the levelling head 15 4 Remove the C ring 9 using the snap ring pliers Remove the plate A 10 worm wheel plate spring 11 horizontal circle 12 and horizontal circle ring 13 from the levelling head 15 5 Unscrew the 3 screws 20 fixing the base plate 19 and levelling screw retainer 16 6 Remove the levelling screw retainer 16 from the base plate 19 7 Remove the levelling screws 14 with the levelling screw pads 17 from the base plate 19 8 Remove the levelling screw plates 18 from the base plate 19 Automatic Level AT B2 B3 B4 Service Manual lt Assembling gt 9 Apply a small quantity of G32 to the surfaces for the levelling screw plates 18 on the base plate 19 Place the levelling screw plates 18 on the base plate 10 Apply G38 to the levelling screw plates 18 11 Apply G38 to the levelling scew pads 17 to the contact surfaces for the levelling screws 12 Apply G32 to the thread of the levelling screws 14 13 Install the levelling screw pads 17 and levelling screws 14 in the levelling screw retainer 16 25 Place the levelling screw retainer 16 so that the surface of better finish is upside i e the levelling head side 14 Screw the levelling screws 15 into the levelling head 16 approximately to the same height 15 Place the base plate 19 with the levelling screw plates 18 on the tips of the levelling screws an
39. mounting tool 9 AT B2 only 4 Loosen the objective lens set screw 8 hexagonal socket screw AT B3 B4 only 5 Unscrew the objective lens 6 with O ring 7 from the telescope frame 3 11 Automatic Level AT B2 B3 B4 Service Manual Assembling 6 Apply G3l to the O ring 7 on the objective lens 6 7 Screw the objective lens 6 to the telescope frame Install the objective lens 6 by rotating it approximately 2 and half revolutions This is initial setting before the further stadia ratio adjustment 8 Proceed with the adjustment of stadia ratio section 5 2 11 page 5 12 AT B2 After adjustment apply the locking agent S91 to the stadia adjusting nut 5 and silicone glue S138 to the hole in the telescope frame AT B3 B4 After adjustment apply the locking agent S91 to the objective lens set screw 8 9 Relocate the objective lens outer frame 4 using the two screws 3 Tighten the screws with torque of 4 5kgf cm 0 45N m 10 AT B2 Put the objective lens frame cover 2 and sunshade 1 onto the objective lens outer frame 25 Align a b and AT B3 B4 Relocate the objective lens frame cover 2 11 Proceed with the inspection and adjustment of the instrument chapter 5 Automatic Level AT B2 B3 B4 Service Manual 3 8 FOCUSING TUBE AND PINION The focusing tube and pinion complete of the AT B2 is different from those of AT B3
40. of sight Automatic Range 16 or more Sight collimator B and tilt the compensation range arg 13 Diff between upper and lower instrument until reticle stops going front to back tilt and bounded bak left to right tilt e ack to center Eccentricity of Check the eccentricity sighting I horizontal circle 2 Ires collimators A and B Horizontal accuracy 15 horizontality of line of 5 or less Check using collimator A or B sight 16 Finder accuracy 10 or less distance of more than 10m 9 The inspection tolerances are in accordance with requirements of Japanese Surveying Instruments Manufacturers Association standard JSIMA 103 2007 Levels Standards for the AT B2 B3 levels are within application category B and standards for the AT B4 levels are within application category D The inspection tolerances comply with the manufacturer standard Although the inspection procedures are same as those of JSIMA 103 2007 standard the specified accuracy of the check items is higher The collimators are setup and adjusted according to Japanese Surveying Instruments Manufacturers Association standard JSIMA 114 2002 Guideline for the Checks and Adjustments of the Collimator System to Surveying Instruments Automatic Level AT B2 B3 B4 Service Manual INSPECTION AND ADJUSTMENT PROCEDURES 5 2 1 EXTERNAL APPEARANCE CHECK 1 Check visually that the outer sections of th
41. oting bar 7 9 hinge pin AT B2 7 10 sealing AT B2 7 11 X warning label 7 12 case name plate AT B2 7 24 UIPMENT nylon cover plumb bob cleaning cloth hexagonal wrench operation manual adjusting pin adjusting pin straight AT B2 illumination pack LA8 optical micrometer OMS diagonal eyepiece DE16 diagonal eyepiece DE22 removable eyepiece 40x EL5 7 20 7 22 7 24 are optional accessories for the AT B2 7 23 is the optional accessory for the AT B3 B4 Automatic Level AT B2 B3 B4 Service Manual P Topcon AT B3 MADE IN CHINA AUTO LEVEL 7 TOPCON AT B4 MADE IN CHINA AUTO LEVEL 8 1 plastic case complete SE49A AT B3 B4 8 2 pin hinge pin AT B3 B4 8 3 sealing AT B3 B4 8 4 strap w rivet AT B3 B4 8 5 3 4 8 6 X latch 8 7 latch pin 8 8 E ring 8 9 pivoting bar 8 10 pin pivoting bar 8 11 8 12 8 13 8 14 8 15 8 16 8 17 8 18 8 19 8 18 8 19 case name plate AT B3 case name plate AT B4 warning label nylon cover plumb bob cleaning cloth hexagonal wrench operation manual adjusting pin Automatic Level AT B2 B3 B4 Service Manual 7 APPENDICES Automatic Level AT B2 B3 B4 Service Manual Automatic Level AT B2 B3 B4 Service Manual I SPECIFICATIONS Telescope Length 215mm 8 46 in Image 1 26 in Objective aperture 5
42. ownward as shown by arrow marks in Fig 6 5 and then tighten the 2 fixing screws illustration No 5 2 Automatic Level AT B2 B3 B4 Service Manual 6 6 EYEPIECE S91 Three Bond 6 23 1 1401C De es 6 186 21 6 19 torque 0 24 0 05N m 2 4 0 5kgf cm Three Bond torque 1401C 0 24 0 05N m 2 4 0 5kgf cm 6 1 eyepiece outer frame AT B2 6 15 eyepiece complete 24x AT B4 6 2 screw 2 5x6 0mm 6 16 w o lens 28x AT B3 6 3 sealing eyepiece AT B2 6 17 eyepiece w o lens 24x 4 6 4 eyepiece complete AT B2 6 18 eyepiece lens D AT B3 6 5 eyepiece w o lens AT B2 6 19 eyepiece lens D AT B4 6 6 eyepiece lens D AT B2 6 20 eyepiece lens E AT B3 6 7 eyepiece lens E AT B2 6 21 eyepiece lens E AT B4 6 8 sealing eyepiece lens AT B2 6 22 Oring AT B3 B4 6 9 Oring 6 23 sealing eyepiece AT B3 B4 6 10 eyepiece knob AT B2 6 24 eyepiece knob AT B3 6 11 screw 2 0x2 0mm 2 6 25 eyepiece knob AT B4 6 12 sealing reticle cover 6 26 screw 2 0x2 0mm AT B3 B4 6 13 reticle cover AT B2 6 27 knob cover AT B3 B4 6 14 eyepiece complete 28x AT B3 6 28 reticle cover AT B3 B4 Automatic Level AT B2 B3 BA Service Manual 6 7 CARRYING CASE STANDARD E ACCESSORIES 7 1 plastic case complete SE35A AT B2 7 2 strap w rivet AT B2 7 3 rivet AT B2 7 4 latch 7 5 latch pin 7 6 E ring 7 7 pivoting bar 7 8 piv
43. r A by using the pliers and fit the penta prism to the reflector frame Automatic Level AT B2 B3 B4 Service Manual AT B3 B4 7 Pull the reflector holder A slightly upward black painted surface and slide the reflector 5 into the reflector frame 3 Keep the black painted surface and non painted area B of the reflector 5 at the position as shown at right AT B2 B3 B4 8 Put the double sided adhesive tape 6 on the front side of the reflector frame 3 9 Attach the reflector frame 3 to the telescope frame using the 2 fixing screws Tighten the screws with torque of of 1 kgf cm 0 1 and apply the locking agent S91 to the screws 10 Relocate the reflector cover 1 25 When any parts of the reflector complete are removed and assembled replace the double sided adhesive tape 6 for a new one 3 10 Automatic Level AT B2 B3 B4 Service Manual 3 7 OBJECTIVE LENS The objective lens complete for each model AT B2 B3 B4 is different lt Disassembling gt 1 Remove the objective lens frame cover 2 from the telescope frame Press the part A to unfold the part B Inthe AT B2 remove the objective lens frame cover 2 with sunshade 1 sunshade is used only in AT B2 2 Unscrew the 2 objective lens outer frame screws 3 Remove the objective lens outer frame 4 3 Unscrew the stadia adjusting nut 5 using the stadia nut
44. r B and if necessary adjust the reticle adjusting screw 1 to align the instrument and collimator horizontal reticles 3 Apply G31 to the reticle cover sealing and attach the reticle cover to the instrument 4 Turn the instrument 360 clockwise and then counterclockwise and resight the collimator Confirm that the horizontal reticles are aligned within 5 5 Repeat step 4 total 6 times Confirm that the instrument horizontal reticle remains aligned with the collimator reticle within the tolerance If out of the tolerance gt Confirm the compensator adjustment section 5 2 13 5 2 16 and the conditions of the optical and mechanical units of the compensator dust dirt sticky parts collimator B 5 23 Automatic Level AT B2 B3 B4 Service Manual 5 2 19 FINDER AT B2 B3 Inspection Tolerance 1 Sight a target with the finder at a distance of Right Left 10 or less more than 10m 2 Look through the eyepiece and check the difference from the target Check if the sighting error is within the tolerance Adjustment 3 Adjust the finder set screws 1 5 24 Automatic Level AT B2 B3 B4 Service Manual 6 1 Automatic Level AT B2 B3 BA Service Manual 6 EXPLODED VIEW NAMES OF PARTS LUBRICATION 6 2 Automatic Level AT B2 B3 B4 Service Manual Automatic Level AT B2 B3 BA Service Manual Gxx shown in the exploded view diagrams of this chapter specifi
45. stment gt 3 Remove the objective lens frame cover and objective lens outer frame 7 section 3 7 page 3 10 AT B2 4 Loosen the stadia adjusting nut 2 using the stadia ring mounting tool 1 5 Rotate the objective lens complete 3 until the stadia ratio is within the tolerance e g rotate the objective lens clockwise to widen the interval of the 2 stadia lines 6 Tighten the stadia adjusting nut using the stadia nut mounting tool 1 and recheck the stadia ratio 7 Apply the locking agent S91 to the nut 2 8 Relocate the objective lens outer frame and 8 or less Sight the collimator A infinity reticle and within 0 4 using the reticle adjusting screw move the reticle of the instrument until the stadia line is centered between the upper double lines of the collimator A Check if the lower stadia line is aligned with the lower line is 3 and the distance between the center horizontal double lines is 20 objective lens frame cover page 3 11 Automatic Level AT B2 B3 B4 Service Manual AT B3 B4 9 Loosen the objective lens set screw 4 using the hexagonal wrench 10 Rotate the objective lens complete 5 until the stadia ratio is within the tolerance e g rotate the objective lens clockwise to widen the interval of the 2 stadia lines 11 Tighten the objective lens set screw 4 using the hexagonal wrench and recheck the stadia ratio 12 Apply the locking agen
46. t S91 to the screw 4 13 Relocate the objective lens outer frame and objective lens frame cover page 3 11 5 2 12 SIGHTING AXIS DEVIATION Caution The collimator A oo 10m 5m and 2m reticles must Tolerance be aligned horizontal in advance AT B2 B3 0 3mm or less 1 Level the instrument and sight the infinity co AT B4 0 5mm or less reticle of the collimator A Confirm alignment of the horizontal reticles If there is a displacement adjust the instument reticle collimator A adjusting screw Fig 5 16 page 5 11 2 Focus on the collimator 2m reticle and adjust the instrument height to align precisely both Fig 5 21 horizontal reticles of the collimator and AT B2 B3 B4 3 Focus on the collimator 5m 10m reticles in turn and read the difference in Y vertical reticle graduations from the instrument horizontal reticle The reticles of Topcon s collimators are graduated to the increment values shown in the following table COLLIMATOR RETICLE GRADUATION INTERVAL 2m 0 5mm 5m 0 5mm 10m 0 5mm 4 Make sure that both difference readings at 5m and 10m reticles are within the standard 5 Ifthe sighting axis deviation is out of the tolerance replace the focusing tube or the telescope frame 5 14 Automatic Level AT B2 B3 B4 Service Manual 5 2 13 ACCURACY OF COMPENSATION TILT RESIDUAL FOR FRONT TO BACK TILT Inspection Tolerance at 15
47. that the pin does not touch the side of the stopper Keep gap equally on both sides 8 Tighten the 2 stopper fixing screws with torque of 1 2 0 3 kgf cm 0 12 0 03 5 2 16 RANGE OF COMPENSATION FOR LEFT TO RIGHT TILT Inspection 1 2 3 4 Range 16 or more Difference between upper and lower bounds 4 or more Place the test level on the telescope frame and precisely level the instrument observing the bubble of the test level vial Sight the collimator B If necessary Using the instrument reticle adjusting screw align the horizontal reticles Turn the telescope frame 90 and rotate the 2 levelling screws 1 and 3 Fig 5 34 by the same amount in the opposite rotation directions to tilt the instrument 16 in the left to right direction observing the bubble of the test level vial Then resight the collimator B if necessary turn the levelling screw 2 to relevel the instrument in the front to back direction and recheck the left to right direction While sighting the collimator B check that the compensator is working i e the instrument horizontal reticle is going back to the collimator horizontal reticle 5 19 Automatic Level AT B2 B3 B4 Service Manual 5 Tilt the instrument 16 in the left to right direction in the same manner as the above steps 3 Resight the collimator B Check that the compensator is working i e the instrument
48. the same method as the above steps 3 and 4 Check that the displacement between the instrument and collimator horizontal reticles is within the tolerance 25 To tilt the instrument in more simple way the levelling base can be turned 90 on the instrument support stand in advance While the 2 levelling screws i e the line passing through the center of the levelling screws are set parallel to the optical axes of the collimators the levelling screw 1 Fig 5 27 can be used to incline the instrument in the left to right direction 25 If the incling stage is used Fig 5 28 tilt the incling stage in the direction perpedicular to the optical axes of the collimators A and B observing the bubble of the inclining stage level vial Option eee 2 sip E collimator A inclining stage collimator B Fig 5 28 Adjustment 6 Remove the cover and the compensator cover 37 section 3 12 page 3 21 compensator fixing screws 7 Loosen the compensator fixing screws 3 pcs 8 Slightly turn the compensator complete against the optical axis in one of directions indicated by the arrow mark in Fig 5 29 9 Tighten the compensator frame screws with torque of 2 4 0 5 kgf cm 0 24 0 05 N m 10 Recheck the compensator accuracy in the left to right direction and also in the front to back direction section 5 2 13 Finally apply the locking agent S91 to the compensator fixing Screws
49. the telescope upward against the levelling unit you may notice some gap in the vertical direction This is normal the clearance originates from the mechanical structure of the instrument and does not affect the instrument accuracy levelling small gap on levelling unit unit in vertical direction Symbols The following conventions are used in this manual BS Indicates supplementary explanation Indicates the chapter section title to refer to for additional information 2 1 Automatic Level AT B2 B3 B4 Service Manual 2 OPTICAL COMPONENTS LAYOUT 2 4 PRINCIPLE OF AUTOMATIC LEVEL An automatic level is designed to keep the line of sight horizontal within the compensation range by means of a system of prism and a mirror supported by wires as in pendulum When the telescope barrel is horizontal rays of light emanating from an objective lens are focused the reticle center However without a compensator the focused point moves to the point when the instrument is tilted at an angle of a The mirror of the compensator being freely supported is inclined by gravity and changes the rays of light at an angle of in proportion to so as to maintain a horizontal line of sight The clamped magnet at the top of the compensator making a practical application of the magnetic damping stops a swing of the pendulum to stabilize the line of sight optical axis TL LS zontal line
50. uter frame 13 and remove the eyepiece outer frame 13 from the telescope frame 3 18 Automatic Level AT B2 B3 B4 Service Manual lt Assembling gt 23 Put the eyepiece lens sealing 6 lens E 8 spacer 9 and lens D 10 into the eyepiece frame 5 take care of the facing direction of the lens D and E 24 Screw the eyepiece lens nut 11 to fix the lenses 25 Apply G32 to the O ring 7 and eyepiece lens frame 5 26 Screw the eyepiece fully clockwise to the eyepiece outer frame 13 27 Fit the eyepiece knob 3 on the eyepiece lens frame 5 and tighten the 2 set screws 4 28 Put the eyepiece knob cover 2 on the eyepiece knob 3 29 Apply G31 to the sealing of the reticle cover 1 30 Proceed with the inspection and adjustment of the instrument chapter 5 3 19 Automatic Level AT B2 B3 B4 Service Manual 3 11 RETICLE The reticle ring 7 and reticle with frame 8 of the AT BT2 are different from those of the AT B3 B4 lt Disassembling gt 1 Unscrew the reticle cover 1 with the sealing 2 Unscrew the 4 eyepiece outer frame screws 2 and remove the eyepiece complete with the outer frame 6 3 Unscrew the reticle retainer 10 from the eyepiece outer frame 6 4 Unscrew the reticle adjusting screw 5 5 Holding the reticle frame 8 unscrew the reticle screw 3 with the spring 4 6 Remove the O ring 9 reticle with frame
51. zontal circle positioning ring to align the horizontal circle 0 graduation with the indicator collimator A collimator B Turn the the instrument telescope through 180 ges 922 and precisely sight the other collimator collimator B Fig 5 39 Find the error d from 180 reading of the scale Sight the collimator A and turn the horizontal circle positioning ring to align the horizontal circle 180 graduation with the indicator Turn the instrument telescope through 180 and precisely sight the collimator B Find the error d from 0 reading of the scale Calculate the horizontal circle eccentricity error as d d2 2 Turn the instrument telescope through 90 and then turn the whole unit incuding the base plate to sight the collimator A Repeat procedures of steps 1 8 for 90 and 270 directions Calculate the horizontal circle eccentricity error Use the bigger value of the 2 settings at 0 and 90 i e eccentricity errors calculated in steps 8 and 10 as the examination data If out of the tolerance gt Check the parts of the levelling assembly and the vertical axis section 3 1 5 22 Automatic Level AT B2 B3 B4 Service Manual 5 2 18 HORIZONTAL ACCURACY 1 Place the instrument on the collimator support stand Bring Tolerance the unit to the collimator height and tighten the fixing 5 or less clamp Level the instrument 2 Sight the collimator A o

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