Related Manuals for Northwest NCL-22
Summary of Contents for Northwest NCL-22
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Page 1: Table Of Contents
1. CONTENTS 2. Nomenclature page 3 3. Care and Maintenance page 4 4. Using your Instrument Setting up your Instrument page 5 Stadia Measurement page 5 Measuring Height Difference page 6 Horizontal Circle and Vernier Reading page 7 Compensator Lock page 8 5. -
Page 2: Nomenclature
2. NOMENCLATURE Quick Sight Sun Shade Eyepiece Compensator Lock Focus Knob Horizontal Horizontal Tangent Knob Circle Base Plate Leveling Screw Circular Vial Bubble Reflector... -
Page 3: Care And Maintenance
With the appropriate care, your instrument will need only minimal routine maintenance and minor adjustments under normal field use. In case your instrument is damaged or abused, it should be taken to a qualified instrument repair facility or returned to Northwest Instrument for repair. -
Page 4: Using Your Instrument
4. USING YOUR INSTRUMENT Setting up Your Instrument 1) Loosen the straps around the tripod legs. Lift the extension quick-release clamps. With the tripod closed extend the legs to roughly eye level and re-tighten the quick clamps. 2) Position the legs in a triangular position, making sure the tripod head is approximately level. 3) Fix the tripod legs firmly into the ground by pressing on the tripod shoes. -
Page 5: Stadia Measurement
Stadia Measurement Your Northwest Instrument Automatic Level is equipped with a stadia reticle so you 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... -
Page 6: Measuring Height Difference
4.3 Measuring Height Difference (1) Set up the instrument at a point approximately halfway between points A and B (Fig 4.3A). NOTE: The reticle stadia lines can be used to optically compare 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). -
Page 7: Horizontal Circle And Vernier Reading
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 the instrument is in its case. The compensator lock can also be used as a compensator check. Push and release the lock button and jiggle the compensator. -
Page 8: Checking And Adjusting Your Instrument
5. Checking and Adjusting Your Instrument Circular Level Set up your instrument properly on the tripod. Adjust the leveling screws to center the bubble into the circle vial. Turn the telescope 180 degree clockwise, check the bubble position, and then, turn the telescope 180 degree counterclockwise and check the bubble position again. -
Page 9: Crosshairs
NOTE: The above adjustment may change instrument calibration. Adjusting the Compensator The compensator in your Northwest Automatic Level is a high accuracy, wire hung magnetically dampened optical system, which should not be adjusted or repaired in the field. If you feel the compensator is not operating properly, the following test should be conducted: 1) Set up and level your instrument as usual. -
Page 10: Specifications
6. SPECIFICATIONS / SELECTION GUIDE Model No. NCL-22 NCL-26 NCL-32 Magnification Leveling Accuracy 1/16" @ 100' 1/16" @ 200' 1/16” @ 300 Working Range w/Rod 200' 300' Telescope Image Erect Objective Aperture 1.2" Field of View 1.5 Resolution 3.5" Minimum Focus 3.3'... - Page 11 For claims to be made under this warranty the instrument must be inspected by Northwest and the defect must be proven to Seller’s satisfaction. At the time that it is proven to the Seller’s satisfaction that the instrument is defective, it shall be repaired or replaced, at the Seller’s option and returned to the original purchaser...
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