Northwest NSL100B Owner'S Manual Download | Manualshive

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8. Make sure not to over-tighten the leveling screw, clamp screw or adjusting
screw.

9. It is recommended that you have a qualified service technician check your
instrument periodically

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Summary of Contents for NSL100B

Page 1: ...1 Owner s Manual Owner s Manual Owner s Manual Owner s Manual NSL100B BUILDERS LEVEL NSL500B TRANSIT LEVEL ...

Page 2: ...etting up your Instrument page 5 4 2 Stadia Measurement page 7 4 3 Measuring Height Difference page 8 4 4 Horizontal Circle and Vernier Reading page 9 5 Checking and Adjusting your Instrument 5 1 Plate Vial page 11 5 2 Check and Calibration page 11 5 3 Crosshairs page 12 6 Specifications page 13 ...

Page 3: ... Cap Objective Lens Cover w Sun Shade Focus Knob Horizontal Tangent Knob Leveling Screw Objective Lens Cover w Sun Shade Plate Vial Focus Knob Vertical Clamp Screw Plate Vial Horizontal Circle Vertical Dial Leveling Screw Base Plate Horizontal Tangent Knob Vertical Tangent Screw ...

Page 4: ...clean and free of dirt and moisture After use clean every part of the instrument completely before putting it back in its case 3 If the instrument becomes wet wipe off moisture completely taking special care of the lenses by using a soft clean cloth or Lens tissue 4 Do not attempt to clean oil or repair interior parts Do not remove any lenses This should be done by a qualified repair technician 5 ...

Page 5: ...5 8 Make sure not to over tighten the leveling screw clamp screw or adjusting screw 9 It is recommended that you have a qualified service technician check your instrument periodically ...

Page 6: ...o align the threads properly Firmly screw the instrument until it fits tightly to the tripod However Make sure not to over tighten cross or strip the threads 5 If you are using a transit level make sure the lock lever is engaged 6 Position the telescope to the direction that aligns with 2 of the 3 leveling screws 7 Hold one of the leveling screws the one at front of telescope with one hand using t...

Page 7: ...If the bubble does not stay at the center the instrument needs to be checked by a qualified technician 11 After leveling the instrument turn the focusing knob to focus on the objective Turn the knob slowly to avoid moving past a focused image 4 2 Stadia Measurement Your Northwest Instrument Siteline Level is equipped with a stadia reticle so you can make distance estimates The stadia lines are loc...

Page 8: ...tically estimate the distances See Fig 4 2A 2 Position the rod vertically at point A Take the reading a backsight on the rod at point A 3 Then sight the rod at point B and take the reading b foresight 4 The difference a b is the height difference h of B from A Fig 4 3A Example h a b 5 25ft 3 25ft 2 00ft Therefore point B is 2 00ft higher than point A the value of h will be ...

Page 9: ...of all the sections The general formula is Altitude of the required point altitude of known point total of backsight values total of foresight values NOTE This simple leveling technique has no error check It is better to measure from A to B and then measure back to A so that the error of closure can be calculated 4 4 Horizontal Circle and Vernier Reading Your instrument is equipped with an easy to...

Page 10: ...Using the index line seen in the circular viewer take the angle reading The index line can be used for reading the circle in increments finer than single degrees This process is for estimation but the average user can position the index line for finer readings NSL500B TRANSIT LEVEL USES AND APPLICATIONS The NSL500B transit level has all the same functions and capabilities as the NSL100B level By u...

Page 11: ...turn the telescope 90 counterclockwise and check the bubble position again If the bubble is off center the plate vial needs to be calibrated by a technician 5 2 Check Instrument Calibration 1 Place two rods facing each other at points A and B at a distance of 50 80 m apart Set up your instrument at point C which is about halfway between A and B 2 Sight the rods and take readings on point A as A an...

Page 12: ...h plumb bob 20 feet away from instrument Observe the vertical line against the cross hair If vertical lines do not match instrument needs to be calibrated by a technician For calibration and adjustment call NORTHWEST INSTRUMENT INC to find a service center near you ...

Page 13: ...gnification 20x 20x Working Range 200 ft 200 ft Objective Aperture 22mm 22mm Minimum Focus 3 5 ft 3 5 ft Stadia Ratio 1 100 1 100 Transit Capabilities No 45 Leveling Head 3 screws 3 screws Tripod Thread 5 8 x 11 5 8 x 11 Approx Wt with case 7 lb 7 lb ...

Page 14: ...lacement with these provisions below A The instrument is returned to Northwest properly packaged with the transportation charges prepaid and insured and accompanied by proof of ownership Receipt and previous registration is required B Except for ordinary wear and tear resulting from normal usage the instrument upon inspection by the Seller is determined to be defective in material and or workmansh...

Page 15: ...nation of the instrument Seller determines that additional repair services are required and not covered under this warranty Seller shall notify the Buyer of such repair charges and proceed only after authorization has been received C This warranty does not apply to instruments damaged in transit to or from Northwest Instrument or any authorized repair center Other remedies may or may not be availa...

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