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w Point the telescope at the target using a collimator. e Tighten the above two screws. r Adjust the eyepiece. t Look through the telescope, and then operate the Power focus key and focus on the target. y Align the reticle accurately on the target using telescope and horizontal tangent screws. Collimator Power focus key Target Collimator Target sighting . Tilting the Power focus key “clockwise” makes it possible to focus on closer objects and “counterclockwise” will focus on farther objects. . Tilting angle of the Power focus key makes it possible to perform following three focusing speeds. Low speed : When tilted to middle position by approx. 5 degrees Middle speed : When tilted fully by approx. 10 degrees High speed : When tilted fully by approx. 10 degrees and passed one second . Operating the Power focus key rotates the AF ring, so do not touch it while it is rotating. 30 PENTAX R-300 (p20-52) 10/30/02 11:08 AM Page 31 3 PREPARATION FOR SURVEYING [Target sighting by Manual focus] q Loosen the telescope clamp and horizontal clamp screws. w Point the telescope at the target using a collimator. e Tighten the above two screws. r Adjust the eyepiece. t Look through the telescope and then rotate the AF ring and stop it where the target can be seen clearly and the target image does not move in relation to reticle even if your eye is vertically and horizontally moved. y Aligh the reticle accurately on the target using telescope and horizontal tangent screws. Collimator AF ring Target Collimator Target sighting The AF ring rotation “clockwise” makes it possible to focus on closer objects and “counterclockwise” will focus on further objects. 31 PENTAX R-300 (p20-52) 10/30/02 11:08 AM Page 32 3 PREPARATION FOR SURVEYING 3-8 Attachment and Detachment of Tribrach The tribrach of R-322, 323, 325, 322N, 323N, 325N, and 326 are detachable from the instrument if required when replacing the instrument with a target or unit prism for example. Detachment First loosen the recessed screw with a screwdriver, then rotate the locking knob until the arrow points upward, and lift the instrument up. Attachment Mount the instrument on the tribrach with the guide marks coinciding, and rotate the locking knob until the arrow points downward. The guide and guide mark must be fitted to attach the instrument. When the tribrach does not need to be attached or detached or instrument is to be transported, tighten the recessed screw with a screwdriver to fix the locking knob. Instrument Tribrach Recessed screw Tribrach locking lever Guide mark 32 PENTAX R-300 (p20-52) 10/30/02 11:08 AM Page 33 4 TURNING THE POWER ON 4 TURNING THE POWER ON 4-1 Turning the Power On and Off Pressing the [POWER] key shows the initial screen. (The [POWER] key is also used to turn the power off.) After a few seconds, it turns to Electronic vial screen. Move the vials to center by adjusting the leveling screws. h Pressing the [ENT] key views the angle and distance measurement screen. MODE A 15 C S 0 H. angle 40"39'85° H. dst. 000° 0000 V. dst. 000° 000 ELECTRONIC VIAL T.COMP. ON 30"/1DIV LD POINT PLUM ADJ SENS. . The Auto Power Off function will automatically turn the power off if no operations are performed for approximately 10 minutes. (Factory default setting) . The [POWER] key is controlled by software in the instrument while it is working, and this key is valid only when turning off causes no problem. . The value displayed when the power was last time turned off will be displayed for the horizontal angle. If this horizontal angle is not needed, please perform horizontal angle 0 SET. For details on resetting the horizontal angle 0 ............See page 37. For details on changing the horizontal angle from clockwise to counterclockwise ...............................See page 41. For details on measuring the vertical angle .................See page 40. For details on distance measurement .........................See page 42. For details on the automatic power-off function ..........See page 59. For details on the Electronic vial ..................................See page 65. 33 PENTAX R-300 (p20-52) 10/30/02 11:08 AM Page 34 4 TURNING THE POWER ON 4-2 Adjusting LCD Contrast Press [F4] while holding down the Illumination key to access the screen for adjusting LCD contrast. Pressing [F1] [ ] will lighten the contrast,while pressing the [F2] [ ] will darken the contrast. Press [ENT] to exit adjustment mode and return to the previous screen. ENT LOW HIGH 0 7 25 LCD DENSITY ADJ ENT LOW HIGH 0 7 25 LCD DENSITY ADJ MODE A 15 C S0 H. angle 40"39'85° H. dst. 0000000° V. dst. 000000° . Pressing the Illumination key views the F3-RETICLE, F4-LCD and F5-ILLU. . LCD contrast may be adjusted as necessary at any time. . The contrast may be adjusted to any one of 25 levels. . LCD contrast may be unappealing under certain environmental conditions such as high temperature. Adjust the LCD contrast as described above in such situations. 34 PENTAX R-300 (p20-52) 10/30/02 11:08 AM Pag...

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