Exposure of Technical English( Sencico)
Transcript of Exposure of Technical English( Sencico)
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ENGLISHFOR
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THEME: Electronic
TheodolitePENTAX ETH-302
( series 300 )
Surveyors :
Huerta Julian
Huamn Wilber
Navarro Gustavo
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Theodolite electronic PENTAX
ETH-302
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Storing and environmentalconditions.
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Battery.
Do not use batteries which have differentremaining capacities.
The four batteries should be on the sametype.
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Transportation.
When transporting, handle the same asfragile and pack the shipping case with
cushioning materials.
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Inspeccion, adjustment andrepair, overhaul.
When not use for extended periods ofhaving been subject to impact or vibration,
be sure to check the instrumentadjustments before using.
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When cleaning the case or the instrument,do not use any organic solvent. The
surface of plastic parts may dissolve anddeformation and discoloration can accur.Wipe off the dirt with a wet cloth of dilutehousehold detergent.
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6/12/12 Names of parts.
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6/12/12 Names of parts.
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2.1 Display
2. Key Operations and Display
Vertical
angle
V=Zenith0, V%=Slope(VH=Horizontal 0,Vc=Compass)
Horizontal
angleBattery
indicator:
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2.2 Keyboard
[V/%] key
(Switches thedisplay of verticalangle)
[R/L] keyset the
horizontal angle
right and leftrotationalternately )
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[HOLD] key(Pressing twice holds
the horizontal angleshown on the display)
[0SET] key(Pressing twice resetsthe horizontal angle to
0,00,00)[ ] Illumination key(Illuminate LCD paneland the telescopereticle)
[ON/OFF] key (Turnsthe power on and offalternately)
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2.3.1
Power
[ON/OFF]
key
2.3 Function of each key
1
Pressing the
ON/OFF key turns
on the powersupply and themessage
0 SET is
displayed. After
the 0 SET ofvertical angle is
performed,
the Horizontal
and Vertical angle
are displayed andthe instrument
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Error Appears OVER RANGE when thetelescope exceeds 45(100%) in viewing
mode V%.
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2.4.1
Remainingbattery
indicator
2.4 Other Functions
The status of theremaining batterycapacity isdisplayed with
symbolizing thebattery capacity.
Battery full -
operating possible
Operation possibleOperation still
possible Get the battery
ready for a stand
by
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Automatic Power-off function
If there is no key operation for about 30minutes, the power supply isturned off automatically.
This function can be set to NIL by specialkey operation. (Refer to 3.5Setting of automatic power off function
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1) Adjust the tripod legs so that a height suitable for surveying isobtained when the instrument is set on the tripod
2) A Set the tripod and fix the metal shoe firmly into the ground
so thatthe tripod head is as level as possible and centered above the
stationpoint. If the tripod head is disturbed by the action of fixing the
metalshoe into the ground, correct the level by extending or
retracting eachleg of the tripod.
3) Set the instrument on the tripod head; insert the tripod centerscrew
into the instrument bottom plate and tighten firmly.
PREPARATION FOR SURVEYINGSetting up the instrument
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Leveling with the Circular
levelAfter [ Setting up the instrument] is
completed, instrument must be leveledusing the circular vial.1) By rotating any two leveling screws,position the bubble in the center of the vial(See A.) (To adjust the screws at the sametime, turn them in opposite directions.)
2) Adjust the remaining leveling screw, andposition the bubble in the center of the circle(See B)
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Leveling with the Plate level
1) Place the plate vial in parallel with a linejoining any two of the leveling screws. Byrotating two leveling screws in the oppositedirection of each other, position the bubble inthe center of the vial (See A)
2) Rotate the plate vial through 90, positionthe bubble in the center of the vial byoperating the remaining one leveling screw(See
3) Confirm if the bubble stays in the center byrotating the instrument 180.If the bubble moves, repeat procedure 1
and 2.
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Loosen the tripod center screw. Look through theoptical plummet eyepiece, and move the instrumentbottom plate until the reticule center coincides with thestation point. (Take care not to rotate the instrument)
Centering with the optical plummet
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Eyepiece adjustment
focus the telescope eyepiece on thetelescope reticule Remove the telescope lenscap. Point the telescope at a bright object.Rotate the eyepiece completelycounterclockwise. Look through theeyepiece, and rotate the eyepiece clockwiseuntil the reticule appears at its maximum
sharpness.
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sight the object.1) Loosen the telescope clamp screw andhorizontal clamp screw.2) Point the telescope at the object using thecollimator sight.
3) Tighten the telescope clamp screw andhorizontal clamp screw.4) Focus on the object by rotating the focusingring, while looking
through the telescope.5)Accurately align the reticule with the object,using each
Tangent screw.
Object sighting
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Measurement
5.1 Horizontal angle measurement (right)Level the instrument, and after power on set the vertical angle 0 point.
Sight the first object using the horizontal clamp and tangent screw as
well as the telescope clamp and tangent screw.
Press [0SET] twice to set the horizontal angle to 0,00,00
Sight the second object using the horizontal clamp and tangent
screw as well as the telescope clamp and tangent screw.
Read the displayed value (B).
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Horizontal angle measurement(counterclockwise)
Press the [R/L] key to switch the horizontalangle display to
counterclockwise reading (HL).
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Vertical angle measurement
Level the instrument, turn thepower on and set the verticalangle 0 point.
Sight the object A using thehorizontal clamp and tangent
screws as wellas the telescope clamp and
tangent screws.
Factory setting is Zenith 0
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Azimuth calculation
First we locate the north with the compass andput at zero angle and then We targeted
the point you want to calculate the azimuth.
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Inspection and Adjustment
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Instructions on inspection and adjustment
Inspection and adjustment should be doneafter setting the instrument on a tripod or onan adjustment stand. Inspection should be done sequentially from[6.2 Plate vial] to [6.5 Perpendicularity of line
of sight to horizontal axis] Adjustments should be finished withadjustment screws having been tightened andwith firm torque. Do not finish by loosening anadjustment screw.
Repeat inspection after adjustment andconfirm if the adjustment is performedcorrectly. It is recommended that a trained professional
perform adjustments, if possible.
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Perpendicularity of plate vial to vertical axis
AdjustmentCenter the plate vial bubble.Rotate the instrument 180, move the bubble half wayback to the center by operating a leveling screw whichis located parallel with the plate vial.Rotate the vial adjusting screw with the adjusting pin
and position the bubble in the center.Repeat procedure again to confirm.
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Perpendicularity of circular vial to vertical axis
Inspection1. Confirm if the bubble of the circular vial is in the
center after the inspection and adjustment of [6.2Plate vial].
2. No adjustment is necessary if the bubble of thecircular vial is in the center but if not, the followingadjustment is required.
Adjustment1. Move bubble to the center by rotating the bubble
adjusting screws, using the adjusting pin.2. Inspect again.
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Difference of the vertical angle
InspectionSet the vertical angle in Zenith 0 mode
Sight an object (Point P) with the telescope and read
the vertical angle (V correct).
Reverse the telescope and rotate the alidade.
Sight point P again in the reverse position and read the
vertical angle (V reverse).
At this time, when (V correct + V reverse - 360)/2 isless than 15, it is within tolerance. If it shows a larger
value, it needs adjustment - Consult your dealer.
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Optical plummet
AdjustmentRemove the cover of the optical plummet.Mark the point set on the line of sight at each stepof 90 on the white paper and call them A,B, C andD.Join the opposed points (A, C and B, D) with a
straight line, and set intersecting point 0.Turn four optical plummet adjusting screws with theadjusting pin so that the center mark coincideswith the intersection point 0.Repeat procedure again to confirm.Optical plummet adjusting screw.
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THANK YOU