Instruction Manual
Contents
1. 7443H English_Manuals 10 24 13 E AM Page 1 JOHNSON 22X Builder s Transit Level Model No 40 6910 Instruction Manual Congratulations on your choice of this 22X Builder s Transit Level We suggest you read this instruction manual thoroughly before using the instrument Save this instruction manual for future use 2013 Johnson Level amp Tool Rev 2 1 oe 7443H English_Manuals 10 24 13 S AM Page 2 Table of Contents 1 Kit Contents 6 Technical Specifications 2 Features and Functions 7 Care and Handling 3 Location of Parts Components 8 Product Warranty 4 Operating Instructions 9 Product Registration 5 Calibration 10 Accessories 1 Kit Contents Description Oty 22X Builder s Transit Level 1 Instruction Manual with Warranty Card 1 Hard Shell Carrying Case 1 Features and Functions e Horizontal Circle Graduated to single degrees and reads by vernier direct to 15 minutes e Vertical Arc Reads to degrees 45 0 45 e Horizontal Tangent Screw amp Vertical Lock amp Tangent Screw For precise movement control e Built in Sunshade For clear sighting e Top Mounted Leveling Vial For effortless viewing e Large Leveling Screws Easy to turn e Versatile Ideal for leveling foundations driveways patios floors for grading street curbs ditches for aligning fences or any other light construction job 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 eS AM Pa2. 13 S AM Page 5 Keep about half the length engaged When the bubble is centered in posi tion 1 turn the instrument and observe the vial in position 2 Now cen ter the bubble in position 2 using only screw C The instrument should now be leveled but to be certain double check Rotate the instrument 180 so the vial is reversed If the bubble will not center when reversed follow adjustment procedure outlined under Bubble Adjustments Aiming and Focusing Rotate the instrument by hand to aim the telescope to the far object Rotate the focusing knob until the object can be observed clearly Rotate the horizontal tangent knob to place the vertical cross hairs on the object Reading the Vernier The vernier is actually a double Se ey vernier that is two verniers in i one This makes it possible to Pinas read any angle turned by the imiia sening of Morisonral Cirle and Vernier telescope whether to the right I og or to the left For example De x consider that you have turned anes Reading 44 20 Angle to Left an angle to the left counter Clockwise after first having set the circle to read 0 Refer to the bottom figure this is what your vernier looks like after having turned the angle 2013 Johnson Level amp Tool Rev 2 5 o 7443H English_Manuals 10 24 13 S AM Page 6 In the illustration to the right the index has passed the 44 degree line but has 6 N 30 60 not gone as far as the 45 degree
3. LEVELS In Canada contact Johnson Level amp Tool s Customer Service Department at 800 346 6682 9 Product Registration Enclosed with this instruction manual you will find a warranty registration card to be completed for your product You will need to locate the serial number for your product that is located on the bottom of the unit PLEASE NOTE THAT IN ADDITION TO ANY OTHER LIMITATIONS OR CONDITIONS OF JOHNSON LEVEL amp TOOL S LIMITED WARRANTY JOHNSON LEVEL amp TOOL MUST HAVE RECEIVED YOUR PROPERLY COMPLETED WARRANTY CARD AND PROOF OF PURCHASE WITHIN 30 DAYS OF YOUR PURCHASE OF THE PRODUCT OR ANY LIMITED WARRANTY THAT MAY APPLY SHALL NOT APPLY AND THERE SHALL BE NO WARRANTY 2013 Johnson Level amp Tool Rev 2 15 o 7443H English_Manuals 10 24 13 S AM Page 16 10 Accessories Johnson accessories are available for purchase through authorized Johnson dealers Use of non Johnson accessories will void any applicable limited warranty and there will be NO WARRANTY If you need any assistance in locating any accessories please contact our Customer Service Department In the U S contact Johnson Level amp Tool s Customer Service Department at 888 9 LEVELS In Canada contact Johnson Level amp Tool s Customer Service Department at 800 346 6682 16 2013 Johnson Level amp Tool Rev 2 oe
4. You can obtain a copy of the limited warranty for a Johnson Level amp Tool product by contacting Johnson Level amp Tool s Customer Service Department as provided below or by visiting our web site at www johnsonlevel com The limited warranty for each product contains various limitations and exclusions Do not return this product to the store retailer or place of purchase Non warranty repairs and course calibration must be done by an authorized Johnson service center or Johnson Level amp Tool s limited warranty if applicable will be void and there will be NO WARRANTY Contact one of our service centers for all non warranty repairs A list of service centers can be found on our web site at www johnsonlevel com or by calling our Customer Service Department Contact our Customer Service Department for Return Material Authorization RMA for warranty repairs manufacturing defects only Proof of purchase is required 14 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 S AM Page 15 NOTE The user is responsible for the proper use and care of the prod uct It is the responsibility of the user to verify the calibration of the instru ment before each use For further assistance or if you experience problems with this product that are not addressed in this instruction manual please contact our Customer Service Dept In the U S contact Johnson Level amp Tool s Customer Service Department at 888 9
5. and level it up Use a plumb bob with about six feet of string Attach the plumb bob string to the hook under the instrument by means of a large loop fastened by a slipknot and adjust the plumb bob until it is clear of the ground point By shifting the entire instrument set the tripod keeping tripod head as level as possible by estimation so that the plumb bob appears to be over the ground point Next press the legs of the tripod into the ground and lower the plumb bob until its point is about one quarter inch above the point on the ground The final centering of the instrument can be made by loosening the tripod center bolt and slowly shift the instrument until the plumb bob is directly over the point on the ground Then retighten the tripod center bolt and re level the instrument To measure horizontal angles such as FIG Fig 8 center and level your 2013 Johnson Level amp Tool Rev 2 11 o 7443H English_Manuals 10 24 13 S AM Page 12 instrument over point F in accordance with previous instructions Rotate the instrument until point E is nearly in line with the vertical crosshair Turn tangent screw until vertical crosshair is on point E By hand set the horizontal circle to read zero Swing the telescope toward point G until the vertical crosshair is exactly on point G Your instrument is furnished with a vernier and you will be able to read the angle closer than a single degree The use of a vernier is explained earlier in
6. line inh In this case the third vernier line from PA the index is lined up with one of the 40 sind ant lines on the circle Since each vernier Reese ME SSS Angi Ta Lali line represents 15 minutes add 45 minutes to the 44 degree reading 3 times 15 minutes equals 45 minutes Therefore our exact reading is 44 degrees 45 minutes 44 45 The Vertical Vernier In reading the vertical vernier the principle is exactly the same as the horizontal vernier Note however that the vernier is below the circle portion rather than inside as in the case of the horizontal One other minor difference is that you will read angles up or down rather than left or right Here again is a double vernier The right hand side reads angles of elevation up and the left hand side reads angles of declination down These are the only differences between the horizontal and vertical verniers 5 Calibration 5 1 Bubble adjustment If the telescope bubble does not remain centered after having leveled the instrument and reversed the telescope end for end 180 as described under the Leveling section the need for adjustment is indicated Use a 3mm hex key 6 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 S AM Page 7 With an adjusting screw A facing to the right Bubble of the bubble and with telescope directly in te sae level line with two of the three leveling screws Se oo note to which side the bubble
7. loosen the two calibration set screws 3 Rotate the eyepiece seat to make the crosshair center in the reticle of instrument on the same level with a known reference point Then rotate the eyepiece tube to make the horizontal hair on the reticle of instrument level by using a known level reference point 4 Tighten the two set screws and restore rubber cover to its original position _ Eyepiece tube 4 gt Eyepiece seat set Screws 5 4 Setting Points in Line with use of transit level Points A and B are two points which are on a line Center and level your instrument over point A sight on point B Bring vertical hair exactly on point B by means of the tangent screw A pencil held vertically at B is useful to show this point Depress the telescope to set points between A and B on line If the top of a stake cannot be seen when you come to set point C sight with the aid of a plumb bob first to find where to drive the stake and secondly to note the point on the top of the stake If it is necessary to continue this line beyond point C center and level your instrument over point B sight point C and continue this procedure 8 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 S AM Page 9 5 5 Determining difference in elevation Measuring a difference in elevation from one set up To find the difference of elevation between two points which can be observed from one position s
8. this manual Fig 8 Fig 9 In layout work it is frequently necessary to set off an angle usually 90 Assume that the 90 angle HIJ is to be laid off and points H and are shown Fig 9 Therefore J is the point you are to set 12 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 S AM Page 13 6 Technical Specifications Telescope Magnification Leveling accuracy Working range Minimum focus Clear objective aperture Field of view Number of lenses Level vial Graduation diameter Horizontal circle Graduations Number Vernier Vertical arc Graduations Number Weight Center screw thread 2013 Johnson Level amp Tool Rev 2 Erect 22X 3 16 100 ft 5mm 30m Up to 200 60m 4 1 2m 22mm 2 100 ft 0 6m 30m 5 4 per 2mm 110mm 1 Each 10 0 90 0 Double direct to 15 min 1 Each 10 45 0 45 2 204 Ibs 1kg 5 8 11 o 7443H English_Manuals 10 24 13 S AM Page 14 7 Care and Handling Care must be taken to maintain the accuracy of the instrument e After each use the instrument should be wiped clean and kept in its carrying case e Remove dust from the lenses with a soft brush or a nonabrasive wipe Never tough the lenses with your fingers e Store the instrument in a dust free area with low humidity 8 Product Warranty Johnson Level amp Tool offers a three year limited warranty on each of its products
9. et up and level your instrument about midway between these points Be sure that a leveling rod held on both opposite points can be read when your telescope is level Each point should not be greater than 150 to 200 feet away from the instrument or you may have difficulty reading the rods The height of the line of sight horizontal crosshair above or below each of the points is found by reading the rod c B B 29 higher than A D 12 3 7 8 higher than C A line of sight 69 inches above A and 40 inches above B is shown above Therefore B is higher than A by 29 inches Suppose one of your points is below the line of sight and the other above Fig B C is 4 feet 6 1 2 inches below the line of sight and point D the underside of a floor beam is 7 feet 9 3 8 inches above the line of sight the latter reading having been obtained by holding the rod upside down with the foot of the rod against the beam D is then higher than C by an amount equal to 4 feet 6 1 2 inches plus 7 feet 9 3 8 inches or a total of 12 feet 3 7 8 inches 2013 Johnson Level amp Tool Rev 2 9 o 7443H English_Manuals 10 24 13 S AM Page 10 5 6 Measure the difference in elevation requiring more than one set up If two points are either too far apart or at too great a difference of elevation to be observed from one set up the procedure shown below is recommended This example assumes that you want to find the difference in elevation be
10. ge 3 3 Location of Part Components Focusing knob Leveling Vial Lock Lever Vertical arc Eyepiece Vertical vernier Horizontal graduated Horizontal vernier circle Vertical tangent knob Vertical lock knob ae Horizontal Telescope tangent knob objective lens Leveling screw 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 S AM Page 4 4 Operating Instructions IMPORTANT It is the responsibility of the user to verify the calibration of the instrument before each use Set Up the instrument on the tripod When setting up the tripod make sure the three tripod points are firmly into the ground and the top of the tripod head is as level as possible Adjust the height of the tripod to a comfortable viewing height and secure the retractable legs Attach the instrument to the tripod head with the center screw and tighten securely as shown in figure below Center screw Leveling Mount the instrument on the tripod lock the telescope in place with the lock lever and line up the telescope vial in position 1 as shown poten i5 Then grasp screws A amp B so that both thumbs are moving in opposite directions either toward each other or away from each other 7 ym O Note that the bubble moves in the same 3 s direction as your left thumb 4 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24
11. is off If to the left loosen screw B and tighten screw A very slightly to remove ONE HALF the error Remove the other half of the error with the two level screws in line with the telescope If the bubble is still not exactly centered repeat the procedure If bubble is off to the right loosen screw A and tighten screw B Otherwise the procedure is identical 5 2 Instrument accuracy check Set up the instrument in an area that is as level as possible and which is about 220 ft long Place two matching level rods about 200 ft apart with the faces toward each other Position and level the instrument so that the distance from the instrument to each rod is the same Fig 1 i aD OOT Take a reading on each rod with the instrument Note the difference and record them Next move the instrument to another point in line with the two level rods as shown in Fig 2 Level the instrument and take readings on the two level rods The difference should be the same A A should equal B B The difference between A A and B B is the instrument error at 200 feet 2013 Johnson Level amp Tool Rev 2 7 o 7443H English_Manuals 10 24 13 S AM Page 8 5 3 Instrument accuracy adjustment SS If the error is more than 3 16 at 100 it is necessary to adjust the instrument When adjusting the instrument 1 Remove rubber cover to expose the two calibration set screws 2 Using a 1 5mm Allen wrench
12. tween points A and D To make the finding of this difference simple use the convenient terms plus sight and minus sight and carry the readings at each set up as shown SET UP SIGHT SIGHT 4 2 7 1 8 8 4 4 2 2 1 9 3 4 911 5 8 7 10 1 4 1 2 1 2 3 Difference of elevation of D with respect to A 12 3 1 8 SUM 12 3 4 8 19 6 5 8 19 6 5 8 7 3 1 2 Minus sign indicates D is below A NOTE Sight Is rod reading from point to line of sight Sight is rod reading from line of sight to point The difference of elevation between D and A is found by taking the difference between the sum of the plus sights and the sum of the minus sights If the sum of the plus sights is larger the final point is higher than the starting point If the sum of the minus sights is larger the final point is lower than than the starting point 10 2013 Johnson Level amp Tool Rev 2 o 7443H English_Manuals 10 24 13 S AM Page 11 5 7 Stadia Distance Measuring Distance measuring can be done using the stadia hairs of the reticle Upper Stadia Hair J B 7 L 100x eee A B Lower Stadia Hair The distance between the upper stadia hair and the lower stadia hair is set at a 1 100 ration So if the difference is 1 foot the person holding the grade rod is 100 feet away from the instrument 5 8 Measuring Horizontal Angles To measure or lay out an angle set the instrument over a point
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