Northwest NCL-22 User Manual Download

Page: 1 / 11

1. CONTENTS

2. Nomenclature

page 3

3. Care and Maintenance

page 4

4. Using your Instrument

4.1

Setting up your Instrument

page 5

4.2

Stadia Measurement

page 5

4.3

Measuring Height Difference

page 6

4.4

Horizontal Circle and Vernier Reading

page 7

4.5

Compensator Lock

page 8

5. Checking and Adjusting your Instrument

5.1

Circular Level

page 8

5.2

Line of Sight

page 9

5.3

Crosshairs

page 9

5.4

Adjusting the Compensator

page 10

5.5

Repair Shop Adjustments

page 10

6. Specifications

page 11

Summary of Contents for NCL-22

Page 1: ...urement page 5 4 3 Measuring Height Difference page 6 4 4 Horizontal Circle and Vernier Reading page 7 4 5 Compensator Lock page 8 5 Checking and Adjusting your Instrument 5 1 Circular Level page 8 5 2 Line of Sight page 9 5 3 Crosshairs page 9 5 4 Adjusting the Compensator page 10 5 5 Repair Shop Adjustments page 10 6 Specifications page 11 ...

Page 2: ...2 2 NOMENCLATURE Base Plate Horizontal Circle Compensator Lock Eyepiece Quick Sight Bubble Reflector Focus Knob Horizontal Tangent Knob Leveling Screw Sun Shade Circular Vial ...

Page 3: ...g 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 or the compensator This should be done by a qualified repair technician only 5 When working near moving equipment never leave your instrument unattended 6 Alway...

Page 4: ...e sure not to over tighten cross or strip the threads 6 When using a dome head tripod slightly loosen the centering screw hold the instrument with both hands and slide it forward or backward across the tripod head until the bubble is approximately centered in the circular vial 7 Turn the telescope until the circular vial is between two leveling screws Observe the bubble position Slightly turn the ...

Page 5: ...u can make simple distance measurements The stadia lines are located in the reticle as shown in Diagram 4 2A below Sight the rod read the two observations at the stadia lines take the difference of these observations and multiply by 100 to obtain the distance between the rod and the center of the instrument ...

Page 6: ...oint B is 2 00ft higher than point A the value of h will be negative if point B is lower than point A When the distance between points A and B is large or if the height distance is great 1 Divide the distance into a number of sections and determine the height difference of each section 2 The height difference between points A and B is the total of the height differences of all the sections The gen...

Page 7: ...he 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 4 5 Compensator Lock All Northwest Instrument s NCL series Automatic Levels are equipped with a locking mechanism that protects the compensator against rough handling transporting and any time t...

Page 8: ...level needs to be adjusted 5 2 Line of Sight 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 and from point B as B 3 Set the instrument at point D which is about 2 m from point A 4 Sight the rods at point A take reading as AA And then sight...

Page 9: ...nce point Then turn the leveling screw which is directly under the telescope When doing this make sure not to let the bubble out off circle If the line of sight changes from the original setting it shows that the compensator is not working properly and should be adjusted by the factory or a qualified service technician 2 Shake the instrument gently If there is no movement sound heard or nonappeara...

Page 10: ...e Aperture 1 2 Field of View 1 5 Resolution 3 5 Minimum Focus 3 3 Stadia Ratio 1 100 Horizontal Circle Diameter 4 Minimum Division 1 Center Type spindle Circular Level Vial Sensitivity 8 2mm Compensator Type Wire Hung Magnetic Damp Compensator Range 15 Tangent Style Continuous Drive Leveling Head Three 3 screws Tripod Fastener 5 8 x 11 Approximate Weight Instrument 3lbs Instrument with Case 4 8lbs...

Page 11: ... Seller is determined to be defective in material and or workmanship Under no circumstances shall the Seller be liable for any consequential incidental or contingent damages whatsoever Limitation s and Exclusions A This warranty does not apply to instruments subject to negligence abuse accident improper operation instruments damaged in transit or damage due to unauthorized service repairs made by ...

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Northwest NCL-22, User Manual

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