operator´s manual sokkia dt4 and dt4s - home - glm · surveying ins sokkia c0,ltd. 1-1, tomigaya...

SURVEYING INS

SOKKIA C0,LTD. 1-1, TOMIGAYA 1-CHOME, SHIBUYA IKYO, 151 JAPAN PHONE 03-3405-521 1 'U. 03-3465-5203 TFLEX SURSOK J2851

Electronic heodolite

OPERATOR'S MANUAL

MEMO CONTENTS

1. PRECAUTIONS 2. PARTS OF THE INSTRUMENT.. . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3. FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 4. BATTERY MOUNTING AND CHECK/Compensation of

verticalangle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 5. KEY FUNCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6. DISPLAY SYMBOLS.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

. . . . . . . . . . . . . . . . . . . . . . . 7. SETTING UP THE INSTRUMENT 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.1 Centring and levelling 9

. . . . . . . . . . . . . . . . . . . . . . . . 7.2 Focussing and target sighting 11 . . . . 8. INDEXING VERTICAL AND HORIZONTAL CIRCLES 13

9. DT4 ONLY: ANGLE AND OPTICAL DISTANCE MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

. . . . . . . . . . . . . . . . 9.1 Key operations for angle measurement 14 . . . . . . . . . . . Zero set: Measure angle between 2 points 14 ........... Angle hold: Set horizontal angle t~ a value 15

. . . . . Horizontal angle selection: Angle repetition mode 16 vo vertical angle mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

. . . . . . . . . . . . . . . . . . . . . . Display and reticle illumination 18 9.2 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 9.3 Optical distance measurement: Stadia survey . . . . . . . . . . 20

10. DT4 WITH EDM: ANGLE AND DISTANCE MEASUREMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

10.1 EDM combinations and mounting . . . . . . . . . . . . . . . . . . . . 21 10.2 Simultaneous angle and distance measuring procedure 24 10.3 Error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

11. CHECKS AND ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . 29 12. INSTRUMENT PARAMETERS AND CHANGING

PARAMETER OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 APPENDICES: A. Indexing vertical circle by face left, face right sightings . . . 42 B. Battery selection/External power supplies . . . . . . . . . . . . . . 43 C. Standard accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 D. Optional accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

. . . . . . . . . . . . . . SPECIFICATIONS/STANDARD EQUIPMENT 48 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

1. PRECAUTIONS

a) When the DT4 is not used for a long time, check it at least once every three months.

b) Handle the DT4 with care. Avoid heavy shocks or vibration. c) If any problems are found with the rotatable portion, screws or optical

parts (e.g. lens), contact our agent. d) After removing the DT4 from the carrying case, close the case to

exclude dust. e) Never place the DT4 directly on the ground. f) Never carry the DT4 on the tripod to another site. g) Protect the DT4 with an umbrella against strong sunlight and rain. h) When the operator leaves the DT4, the vinyl cover should be placed

over the instrument. i) Always switch the power off before removing the internal battery. j) Always remove the battery from the DT4 before returning it to the

case. k) Do not wipe the display 0 , keyboard Q or the carrying case with

any organic solvent. I) When the DT4 is placed in the carrying case, follow the layout plan. m) Make sure that the DT4 and the protective lining of the carrying case

are dry before closing the case. (The case is hermetically sealed; if moisture is trapped inside, damage to the instrument could occur.)

Tribrach clamp locking screw

IMPORTANT When the DT4 leaves our factory, the tribrach clamp @ is locked with a screw. Loosen it and leave it loose.

2. PARTS OF THE INSTRUMENT O Handle

@ Instrument height mark

O Internal switch cover (For servicing only)

O Display

O Keyboard

O Lower clamp cover

O Lower clamp

O Tribrach clamp

O Base plate

(D Circular level adjusting screw

@ Circular level

(B Levelling foot screw

@ Tribrach

@ Horizontal circle positioning ring

@ Optical plummet eyepiece

@J Optical plummet focussing ring

g) EDM connector

@ Objective lens

@ Handle securing screw

@ Tubular compass slot

QD Battery, BDCPl

@ Sensor index adjustment cover

@ Power switch

@ Horizontal clamp

@ Horizontal fine motion screw

@ Data output connector

OD External power source connector

@ 0 index mark

dif Oo mark

@ Plate level

@ Plate level adjusting screw

@ Vertical clamp

@ Vertical fine motion screw

@ Telescope eyepiece

@ Telescope reticle adjustment cover

Telescope focussing ring

@ Peep sight

MAINTENANCE

a) Wipe off any moisture if the instrument gets wet during operation.

b) Always clean the instrument before returning it to its case. The lens requires special care. Dust it off with the lens brush first, to remove minute particles. Then, after providing a little condensa- tion by breathing on the lens, wipe it with a soft, clean cloth or lens tissue.

c) Store the instrument in a dry room where the temperature remains fairly constant.

d) Check the tripod for loose fitting and loose screws.

The specifications and general appearance of the instrument may be altered at any time and may differ from those appearing in catalogues and the operator's manual.

Standard Equipment 3. FEATURES

Main unit . . . . . . . . . . . . . . . . 1 Vinyl cover.. ............. 1 Carrying case SE30 ....... 1 Sunshade.. . . . . . . . . . . . . . . 1 Shoulder strap.. . . . . . . . . . . 1 Lens cap . . . . . . . . . . . . . . . . 1 Plumb bob . . . . . . . . . . . . . . . 1 Battery BDC21 Adjusting pins . . . . . . . . . . . . 2 (including R6P X 4) . . . . . . . 1 Screwdriver . . . . . . . . . . . . . . 1 Operator's manual . . . . . . . . 1

. . . . . . . . . . Tubular compass . . . . . . . . . 1 DT4 Field guide 1 Brush . . . . . . . . . . . . . . . . . . . 1

@ The DT4 can be used not only as a highly-accurate, electronic digital theodolite, but as an electronic total station when combined with the REDmini2 or RED2A/L.

@ Both the horizontal and the vertical circles are provided with 0 index points. The horizontal index value is stored in the short-term memory, so that even after power is lost (i.e. battery change or automatic power cut-off), the previous index position can be recovered when the instrument is switched on and the circle is indexed again.

@ The tilt angle of the vertical axis is measured by an internal sensor. The vertical angle can be automatically compensated for this tilt angle and the compensated angle displayed.

@ The DT4 has an internal memory which stores the instrument parameter settings. The parameter functions can be changed by key operation and the new settings are memorized even after power off.

@ Any standard "AA" size batteries, rechargeable Ni-Cd or alkaline type (i.e. LR6 or R6P) batteries can be used.

e A RS-232C data-output connector is provided for use with a data collector or external computer. The DT4 can transmit horizontal and vertical angle data when used without EDM, and transmit slope distance, horizontal and vertical angle data when an EDM is being used to measure the distances.

4. BATTERY BDC21: MOUNTING AND CHECK Battery release 1) Ensure that the power switch @ is OFF. cover Release button 2) Mounting the battery:

a) Match the battery guide with the hole in the instrument battery recess.

b) Press the top of the battery until a click is heard.

L - C) Close the battery release button cover. '$ -

3) Removing the battery: a) Open the battery release cover. b) Press the release button downwards. c) Remove the battery.

4) lnstrument and battery check: Turn the D14 power switch @ ON.

The audio tone sounds and all the display symbols are shown on the display while the instrument performs self-diagnostic

I checks. 4 P

When the instrument has successfully : "1 *t

F: completed the checks, the remaining bat-

T tery power is displayed as a numeric code for three seconds:

Code 0 . . . . . 1.5 hrs (e.g. Alkaline 1 . . . . . 1.5-10 hrs R6P

batteries 2 . . . . . 10-15 hrs at 25°C)

Measuring mode Horizontal angle Vertical angle

Measuring time Sensitivity of levels

Plate level Circular level

Optical plummet Image Magnification Minimum focus

Data output

Self diagnostic function Power-saving cut-off Display of feet units Operating temperature Power supply

Power source

Working duration DT4 only

Instrument height Size

without handle with handle

Weight

Right/Left/Hold/Repetition 0" at zenith/ 0" horizontal on face left/ 0" horizontal +90°/

vertical angle) Less than 0.5 seconds

Erect 3X 0.1 m Asynchronous serial RS232C compatible Provided 30 minutes after last key operation Available -20°C to 50°C (-4°F to 122°F)

Detachable battery BDC21 (4.8-6 V)

15 hours at 25°C (5 hrs at -20°C) (Alkaline batteries "AA" size X 4)

236 mm (193 mm from tribrach dish)

143(W) X 165(D) X 286(H) mm 143(W) X 165(D) X 338(H) mm DT4 5.2 kg (with battery DT4S 5.3 kg and handle)

g 1 The display of 3 7 indicates that the m.

n C C -, U. -6 C

instrument is ready for vertical and horizontal circle indexing.

SPECIFICATIONS/STANDARD EQUIPMENT

Telescope Length Aperture Magnification Resolving power Image Field of view Minimum focus Stadia ratio Additive constant

Horizontal circle Type Minimum display

Vertical circle TY Pe Minimum display

Accuracy

Horizontal Vertical

Automatic compensator TY Pe Minimum display Range of compensation

Display

Angle range

Distance range

165 mm 45 mm 30X 3" Erect 1 "30' (26 m/ 1000 m) 0.9 m 1 : 100 0

Incremental with zero index 5" (0.001 gon/0.02 Mil)

If ;7 dlf d is displayed, this indicates that the battery voltage is too low for measurement. Turn the power switch off and replace the dry cell batteries in the battery case as follows:

5) Changing the dry cell batteries: Remove the battery from the DT4. Push down and slide open the battery case cover. Install the four new "AA" size batteries in the directions indicated inside the

Incremental with zero index 5" (0.001 god0.02 Mil) Standard deviation of mean of measurements taken in positions I and I1 (DIN 18723) 5" (0.002 gon10.02 Mil) 5" (0.002 gon/O.O2 Mil) Selectable on/off Liquid 5" (0.001 gon/0.02 Mil) +3' LCD double &digit display on each face t 1 999"50'55"/ t 3999.999 gonl t 19999.98 Mil (t999.909%) 9999.999 m 1 32808.33 R

Note on automatic vertical angle compensation

When the -'L mark is shown on the display, the vertical angle is automatically compensated for small tilt errors. The internal tilt sensor has a range of +-3' and a resolution of 5".

Instrument parameters : See pages 37-41. -5 c* -?-L - 4

Parameter 3 can be used to swltch off and on the automatic vertlcal angle compensatlon; for example, the automatic cornpensatton should be "

off I the display IS unsteady due to vlbratlon or strong wind. g g* --,y-**m4/ -*-- *-Fee &- 5-5- --p&* -& - 7

5. KEY FUNCTIONS

The upper functions are accessed by pressing and the required key. i.e.: To obtain the % function press + 6 .

SEL e Select the required instrument parameter option. (See page 37) m e Select slope distance, horizontal distance or height difference for distance measurements.

TRK

TRK e Select/release tracking mode of REDmini2. ( I?*T~ + ) m e Transfer to angle and distance measurement mode. Startlstop distance measurements.

010

c Selectlrelease vertical angle display.( ,=T; + W ) m e Return to angle measurement mode.

OSET

OSET e Set horizontal angle to zero. ( ET + m ) m e Select horizontal angle to right, left or by repetition.

H1

e Holdlrelease horizontal angle. ( !@ + ) m e Illuminate display and reticle of telescope.

ENT e Enter the parameter setting into the memory (See page 37). e Selectlrelease shift mode (upper function).

Note: A single audio tone is output when a key is pressed. A double audio tone warns of a key misoperation.

6) Electronic field books SDR series The SDR series can collect and store all angle and distance values output from the DT4 data output connector a. The stored data can be verified and printed in the field, then transmitted by cable or modem to an IBM-compatible office data processing system for final computation,

SDR printing and plotting.

SDR features: @ Simple operation with clear menu and

program display prompts. @ Wide choice of recording parameters. @ Recorded data can not be cleared from

the memory until it has been transmitted or printed.

@ Additional programs and data can be

Printer

input to the SDR from an external computer.

SDR series Specifications: Computer

I Power source:

Plotter

Memory type: Keyboard: Display: Baud rate:

Operating temperature:

Weight:

" A A size batteries

(X41 CMOS 33 keys LCD 300, 600, 1200, 2400, 4800, 9600 bps

7) Interface lF lA for the HP41CV Using this interface, the DT4 can transmit angle and distance data to a HP41CV computer.

The DT4 has two measurement modes and one parameter setting Appendix D. Optional accessories

1) Diagonal eyepiece DE17

( @ Solar The diagonal eyepiece is convenient for Fllter MAO4A) near-vertical observations and in places

where space around the instrument is limited. Remove the telescope eyepiece by unscrewing the mounting ring, and screw in the diagonal eyepiece.

2) Eyepiece prism EP3 The syepiece prism is convenient for steep observations up to 60" from the horizontal, and has an attached solar filter.

3) Solar filter EF2 For observations to the sun, and where glare is present.

4) Circular compass CP8 Mount the CP8 on the standards after removing the carrying handle. Before use,

screw loosen the clamping screw on the under- side of the compass. After use, re-clamp the screw.

5) Target sets TGI and TG2 The TGI and TG2 targets can be mounted

T G ~ T G ~ on the standard tribrach.

An illumination device (standard acces- sory) can be attached to the back of the target plate for surveying in low light conditions. The target heights are 233 mm.

mode. When it is switched on (and the vertical and horizontal circles are indexed by rotating the telescope and upper part respectively), it is automatically in the angle measurement mode.

measurement

I I I oarameter I L@I < 1 ketting mode 1

C+ Angle measurement mode (Parameter

DT4 accepts:

e Angle and distance measurement mode (REDrnini2 only)

DT4 accepts:

:~!~lsili1hl&l o Instrument parameter

setting mode * DT4 accepts:

*

* In parameter setting mode, the key and E key

function as SEL and ENT respectively.

6. DISPLAY SYMBOLS Appendix C. Standard accessories

( V Vertical angle (0' at zenith)

,, V Vertical angle (0" horizontal on face left)

V Vertical angle (0" horizontal t90°)

/ Compensated angle

Shift

Ox- Vertical angle

gon

EDM power on Angle or distance value or error code ' Feet

H m, Horizontal angle right H *= Horizontal angle left H m,, Horizontal angle repetition H m Horizontal angle hold

A Slope distance

A Horizontal distance -

AI Height difference

1) Tubular compass CP7 (accuracy t l ") To mount the CP7, slide it into the tubular compass slot @ . To use, loosen the clamping screw to free the compass needle. Turn the instrument in the face left position until the compass needle bisects the index lines. The telescope is now aligned with magnetic north. After use, tighten the clamp to fix the compass needle and remove it from the instrument.

2) Plumb bob

Tribrach 4 clamp

If the weather is calm, or for initial tripod centring, the plumb bob can be used for centring. To use, unwind the plumb bob cord and attach it to the hook inside the centring screw. Use the cord grip piece to adjust the cord length.

The DT4 instrument can be removed from the tribrach by rotating the tribrach clamp anticlockwise and carefully lifting the instrument up.

(The DT4S has a shifting tribrach for quick centring, and the instrument can not be removed.)

4) Handle The carrying handle O can be removed from the instrument by unscrewing the handle securing screw @ and sliding the handle to the side. When replacing the handle, ensure that the securing screw is fully tightened.

External power supplies

Internal 7 battery BDC21

/'-. AC Adaoter

Charger CDC14 IOOV AC CDCl4A 120V AC CDC14D 220V AC

C (1 5 hours charger)

Cable (6V) EDC3

6V DC BDCI2 1 hour cigarette

lighter charger

r CDCl3 (12V DC)

(220-240V AC)

(1 20V AC) (CDCIZ, IOOV AC)

L 1 hour quick charger CDCI 5 (1 00-240V AC)

Car ciaar liahter cable - - EDC4

External battery adapter EDC14 cable

EDC5

Use the DT4 only with the above battery combinations. Note: When using the DT4 with an external power source, leave the

BDC21 in place to balance the weight on the axes.

7. SETTING UP THE INSTRUMENT

7.1 Centring and levelling

1) Ensure that: a) The tripod head is approximately level,

and over the surveying point. b) The tripod shoes are firmly fixed in the

2) Place the DT4 on the tripod head. Support it with one hand and insert and tighten the centring screw with the other.

3) Focus on the surveying point: a) Turn the optical plummet eyepiece @ to

focus on the reticle. b) Turn the optical plummet focussing ring

@ to focus on the surveying point.

Levelling Optical plummet 4) Adjust the levelling foot screws @ to

centre the surveying point in the optical screb @ plummet reticle. Observe the off-centre direction of the circular eve1 @ bubble.

Adjust Optical plummet 5) Shorten the tripod leg nearest the bubble tripod 5 leg direction or extend the leg farthest from @ this direction.

Generally, two tripod legs must be adjusted Circular level to centre the bubble.

6) Using the horizontal clamp @, turn the upper Appendix B. Battery selection/External power supplies part of the instrument until the plate level @ is parallel to a line between levelling screws Battery selection

A and B. Any good-quality "AA" size batteries may be used in the DT4,

Centre the plate level bubble using levelling although alkaline batteries normally last longer than the other types.

screws A and B. However, battery characteristics change with the working

A B Note: The bubble moves towards a clockwise- rotated foot screw.

Bubble movement

7) Turn the upper part 90" The plate level is now perpendicular to a line between levelling screws A and B. Centre the plate level bubble using levelling screw C.

A B

C f-7 8) Turn the upper part a further 90" and check . .

the bubble position.

If the bubble is off-centre, either perform the plate level adjustment described on page 29

A B or carefully adjust levelling screws A and B in equal and opposite directions to remove half of the bubble displacement. Again turn the upper part a further 90" and use levelling screw C to remove half of the displacement in this direction.

The bubble should now remain in the same position for any position of the upper part.

(If it does not, repeat the levelling procedure.)

temperature. From the graphs it can be seen that for sub-zero temperatures re-chargeable Ni-Cd batteries will last the longest. Choose the battery type best suited to the working temperatures.

4.0 V-! Ni-Cd Manganese (R6P)

APPENDICES

Appendix A. Indexing vertical circle by face left, face right readings.

Like all theodolites, the DT4 will have a vertical index error. The vertical index can be determined, and the index error removed, by the following procedure:

1) Carefully level the DT4 and switch the instrument on.

2) Change the instrument parameter 2 to option F1: (See page 38) i.e. Vertical circle FT-7 c,. 3 C indexing by face left. face right readings.

-- The prompt v : is displayed.

Face 3) In the face left position, accurately sight a left clear target at a horizontal distance of

about 30 m.

0 SET

Press D.

The prompt v Z is displayed.

4) On face right, accurately sight the same Face target. r~ght

OSET

Press VtFT m again.

[G, When the vertical circle has been indexed, the vertical angle is displayed. The horizontal angle should now be

p indexed. Note: The vertical and horizontal circles must be re-indexed each

time the DT4 is switched on. Ensure that the instrument is switched off when moving it to a new location.

The following steps are different for the DT4 and DT4S: DT4:

@ 9) Look through the optical plummet eyepiece. Loosen the centring screw slightly. Carefully slide the instrument over the tripod head until the surveying point is exactly centred in the reticle. Re-tighten the centring screw.

10) Repeat procedures 6)-9) until the instrument is correctly levelled and centred over the surveying point.

DT4S: 9) Turn the tribrach shifting clamp anti-

clockwise. Adjust the instrument position on the tribrach to centre the surveying point. Tighten the shifting clamp to fix the instrument in the centre position.

Note: The DT4S shifting tribrach can be adjusted up to t8mm without moving the base plate.

7.2 Focussing and target sighting

1) Look through the telescope at a bright, featureless background and turn the eyepiece clockwise, then anti-clockwise until just before the reticle image goes out of focus. Using this procedure, frequent reticle re-focussing is not necessary, since your eye is focussed at infinity.

2) Loosen the vertical and horizontal clamps and use the peep sight @ to bring the target into the field of view. Re-tighten both clamps.

3) Turn the focussing ring @ to focus on the target. Use the vertical and horizontal fine motion screws @, @ to sight the target precisely. The last adjustment of each fine motion screw should be in a clockwise direction. Check that there is no parallax between the target image and the reticle.

Parallax: This is the relative displacement of the target image with respect to the reticle when the observer's head is moved slightly before the eyepiece. Parallax will introduce reading errors and must be removed before observations are taken.

Parallax can be removed by re-focussing with the focussing ring.

/7\ 4) Position of the target in relation to the reticle a) When observing simultaneous horizontal

and vertical angles

m c) When observing vertical angle

\L/ Note: Observe to the same point of the reticle when the telescope face is changed.

F L 1 c;:;z 1 FO: Illumination on/off using the

e f4 F L-

- 1 m key. f W

i

F1: lllumtnatton cut-off 30 seconds "

after presstng the m key.

(Press 113 to return to angle measurement mode)

G !

9 L . - P F3: bright

(Press 113 to return to angle measurement mode)

m: v 3 l , L 1 1 FO: Vertical angle displayed at power

.- - - ---- ,l F1: On. 010 vertical angle displayed at

-. ... -. power on.

press @ (Press to return to angle measurement mode)

Parameter 1 again

- 41 -

FO: New RED mini2

(set tracking mode from DT4)

F1: RED 2A12L

press l@ (Press m to return to angle measurement mode) <--

Parameter 8: Distance units

(Press &a to return to angle measurement mode)

Y &

'ewer cut-off 30 m~nutes after last g,.i5 L- i I

p(' lion. - -- I

Switch onloff with the DT4 switch. L -

press 6% (Press 8@ll to return to angle measurement mode)

See next page

8. INDEXING THE VERTICAL AND HORIZONTAL CIRCLES

Turn the DT4 power switch @ ON.

/ .. . . . waiting for vertical circle indexing

- I, SE . . . waiting for horizontal circle indexing

(If v: is displayed, see page 42)

1) Vertical circle indexing Loosen the vertical clamp @, and transit the telescope completely. (Indexing occurs when the objective lens

.-P P crosses the horizontal plane in face left.) The audio tone sounds and the vertical angle (V) is displayed.

2) Horizontal circle indexing Loosen the horizontal clamp @, and rotate the upper part completely. (Indexing occurs when the 0 index mark @ passes the 0" mark @ on the horizontal positioning ring.) 3 The audio tone sounds and the horizontal

H :, c $3 0 h ,-," et -I U -I -, U U angle (H) is displayed.

Angle measurement can now begin.

Note: Each time the instrument is switched on, the vertical and horizontal indices must be redetermined. However, if the instrument was only switched off for a short time (less than 5 hrs), a display of H 5 E 7. means that the previous horizontal 0" position is recovered when the horizontal circle is indexed again.

change the horizontal circle indexi ng the upper part or automatic index

9. DT4 ONLY: ANGLE AND OPTICAL DISTANCE MEASUREMENT

Parameter 1: Vertical angle mode: FO: Zenith 0" F1: Horizontal O"F.L. F2: Horizontal O a f 90"

9.1 Key operations for angle measurement

9.1.1 a) Set horizontal angle to zero. OSET

Press @f (m) to set the horizontal angle

9.1.1 b) Measure the angle between two points using operation a).

* \ Sight the first target A.

OSET

Press [G) m to set the horizontal angle display to zero as in a).

Use the horizontal clamp and fine motion screw to sight target B.

The displayed horizontal angle is the angle between points A and B.

- 1 4 -

FO: Indexing by rotating the upper pa I-

F0 lndex~ng by rotat~ng the upper part B C------------------------------J I 5iim i

ldexing and zero set at power on

FO: 360 Degrees

F1: 400 gon

F2: 6400 Mil

(Press P11 to return to angle measurement mode)

FO: 5" (0.001 gon/ 0.02 Mil)

F1 : 10" (0.002 gon/ 0.05 Mil)

press $3 (Press to return to angle measurement mode)

See next page -39-

Changing instrument parameter options

F0 Zenith O", face left hor~zontal QO",

Nad~r 180°, face r~ght hor1zontal270"

l t F1: Face left horizontal O", Zenith 90".

Face right horizontal 180°, Nadir 270"

F2: Face left horizontal Oo, Zenith go",

press 6 (Press D to return to angle measurement mode) = *_

FO: lndexing by transitting the tele-

scope (See page 13)

F1: lndexing by face left, face right

readings (See page 42)

(Press to return to angle measurement mode)

FO: Vertical circle compensator on

F1 : Vertical circle compensator off

9.1.2 a) Hold the horizontal angle.

b H

Press to hold the displayed hor~zontal angle. The hold symbol is displayed.

To release the horizontal angle hold, again H4

press ,,, m . 9.1.2 b) Set the horizontal circle to a required value using operation a).

e.g. Set 60°00'20" to reference target R.

Use the horizontal clamp and fine motion

U c$ L# L( C C, screw to turn the theodolite until an angle

-P of 60°00'20" is shown on the display.

H1

Press iswrl m to hold the horizontal display, as above.

Use the horizontal clamp and fine motion screw to turn the theodolite to sight on the reference target R.

W4

Press '=FT m to release the display hold.

Reference target R has now been set to c n n n 1, n C# C, C, C, c C,

- - P

60°00'20".

Press L~ (Press to return to angle measurement mode)

See next page -38-

9.1.3 a) Select the horizontal display.

m - 1 Use the key to select the required

H" C ,-:,-, ,-;,,- 11 horizontal angle display: ' J C I U U C U

C P

1 (display symbol m r : horizontal angle right) .m

~ O J U , t - t a tn L H C h( - -, " 3 -, ' 3 U (display symbol 4. : horizontal angle left)

4

(display symbol m v r :horizontal angle by repetition)

9.1.3 b) Angle repetition mode

.. .-- *YB For higher accuracy reading, the angle can be measured a number of times (up to an

m angle total of t1999"59'55"), and the average calculated. rirT a) Press until horizontal angle by repeti-

----p-

tion is selected as in 9.1.3 a) above. is displayed.

b) Sight target A.

c) Press @ & to set the horizontal angle torero as in 9.1.1 a) on page 14.

" '... . . / B d) Use the horizontal clamp and fine motion

h screw to sight on target B.

I/

, ,, 1 The angle between A and B is displayed. 1 i*b;YoL(Y ;U" L --' U4

e) Press to hold the horizontal angle

i..;! as in 9.1.2 a) on page 15.

12. INSTRUMENT PARAMETERS AND CHANGING PARAMETER OPTIONS

The instrument parameter settings can be changed by key operation. To change the settings, select the parameter setting mode by the following key operation:

Angle measurement setting

l +a+ ",Ode

confirm I

* Parameter settings when the instrument left the factory.

5

6

7

8

9

10

11

12

IMPORTANT: Each time the instrument parameters are changed, the new settings become the new default parameter settings.

Angle units

Angle resolution

EDM combination

Distance units

Auto power off

Illumination auto off

Illumination brightness

V. angle display priority

* Degrees/ gon/ Mil

* 5"(1 mgon/0.02 Mil)/ 1 O"(2 mgon/0.05 Mil)

* REDmini2/ RED2A/ L

' Metres/ Feet

On/ off

" Off/ on 4 levels of brightness

' Vertical/ vertical angle

11.5 Optical plummet

a) Carefully level the DT4 and exactly centre a surveying point in the reticle of the optical plummet.

b) Turn the upper part 180" and check the position of the surveying point in the reticle. If the surveying point is still centred, no adjustment is necessary.

If the surveying point is not still centred in the optical plummet, adjust as follows:

Use levell~ng screws @Remove half of the displacement using the

levelling foot screws. @Unscrew the optical plummet reticle cover.

1 /2 Useretlcle @ Adjust the four optical plummet reticle adjustrng screws adjusting screws with the adjusting pin to

centre the reticle exactly on the surveying point.

C

For procedure, see "vertical and hori-

8 , 8 , @ on the previous page.

W

WARNING: Over-tightening the adjusting screws may damage the reticle. Unequal tightening of the adjusting screws may mean that the reticle will go out of adjustment.

@Check the adjustment by rotating the upper part. The surveying point should remain centred in the reticle. If necessary, repeat the adjustment.

A , , B f ) Use the LOWER clamp0 and horizontal fine

motion screwme to sight back on target A. Press m to release the horizontal angle display hold.

A -...,...,,/' B g) Use the horizontal clamp and fine motion

h screw to sight target B again. The display shows the sum of the two

1 7 measurements of the angle between A and

(Double angle value)

h) Repeat e)-g) to measure the angle the required number of times, then divide the total angle value by the number of times it was measured to find the average angle value.

To exit from the angle repetition routine, press tJm .

9.1.4 .h vertical angle

010

Press rwrJ to change to the .h vertical

2 U 3 0 -1: angle display. r The 010 symbol is displayed.

~ I O O % Maximum displayed value = f 999.909%

oO 0%

010 vertical angle = 100 X tan 6 where 0 = 0°+90"

Press a again to return to the vertical a angle display.

9.1.5 Illumination

m Press m to illuminate the display and reticle of the DT4. fn Press B again to switch the illumination

W off.

Note: The selected horizontal angle mode (right or left), 0" position on the horizontal circle and vertical angle mode are stored in the short-term memory after the power is switched OFF. After about 5 hours, all the options return to their default values. This function can be useful when the battery has to be changed during survey work, or in the case of an auto power cut-off, as the horizontal angle index and angle options can be restored at power on.

Parameter 10: Switch onloff the 30-second illumination cut-off facilit

Parameter 12:

@ While still sighting the target on face right, ri j0j'J , C

+ -I rr -, , I et use the horizontal and vertical fine motion screws to adjust the displayed horizontal and vertical angles to the above values.

@ Look through the telescope. The reticle is now slightly shifted from the target.

@ Unscrew and remove the telescope reticle adjustment cover.

@To move the vertical reticle line towards the target centre, use the adjusting pin to adjust the left and right adjusting screws as follows:

lvertlcal rettcle h e 1 To move the reticle to the right (left), first Example TO move the reticle very slightly loosen the left (right) adjusting

to the right (left) screw, then tighten the right (left) adjusting screw by this same amount.

the reticle position and repeat the ure until the reticle comes close to

the target centre.

W/ @ To move the horizontal reticle line towards (2 Tighten.) ( l the target centre, adjust the top and bot-

tom adjusting screws as follows: l Horizontal reticle line I To move the reticle down (up), first very Example: To move the reticle slightly loosen the top (bottom) adjusting

down (up) screw, then tighten the bottom (top) ad- - @slightly justing screw by this same amount. Checic

loosen. g (2 Tighten.) ,-IT--. the reticle position and repeat the proce- +'.:W dure until the reticle comes close to the

target centre. @ Replace the reticle adjustment cover.

@Tighten by the same l3 (1 Loosen). WARNING: amount

Over-tightening the adjusting screws may darn- age the reticle. Unequal tightening of the adjusting screws may mean that the reticle will go out of adjustment.

11.4.2 Vertical and horizontal reticle line positions

a) Set up a clear target 100 metres from the DT4. Carefully level the DT4, switch on and index the vertical and horizontal circles.

p r o S - 7 ; J b) Sight the target on face left. ~ 0 3 u n n ,U A I C# I,

Read the horizontal and vertical angles.

I : v., r S U c ,';:??l S -I L' cc -8 C) NOW sight the tarjet on face right and read

H : 9 8 3 ~ :3 the horizontal and vertical angles.

d) Subtract the horizontal face left angle from e.g. H = 198"34'10"-18"34'00" the horizontal face right angle. = 18V00'10

The difference should be within 180" +20".

e) Add the vertical face left angle and the e.g. V = 9V30'10 t 26V30'05

= 3 6 ~ 0 0 ' 1 5 vertical face right angle. The sum should be within 360" 3~20". If either of the values are greater than 20", repeat the above procedures.

If the difference is consistently greater than 20", the theodolite reticle should be adjusted using the following procedures:

Example: when Note: Ensure that all clamps: vertical, hori- Horizontal F.L.1F.R. = 18"34'W1198"34'30" zontal and lower are fully tightened. iie, error = t30

Mean _ 18"3600" + 198"3430 + @ Calculate the mean face right horizontal . - - H 2 and vertical angles, i.e.

= 198"34'15

horizontal = (F.L. + F.R.)

Mean 26930'20 - 90"30'10 2 + 90"

- + 180"

9.2 Error codes

If there is any fault in the theodolite function, the error codes shown in the following table will be displayed.

* If the DT4 is rotated faster than four revolutions per second, the error

indication C or C :D : is displayed.

See page 28 for the error codes for distance measurement

When the error indication E appears with any number other than the ones

above, please contact our agent.

(F.R. - F.L.) vertical =

2 + 180"

9.3 Optical distance measurement: Stadia survey Stadia lines

The telescope reticle is provided with stadia lines (two vertical and two horizontal) which can be used to measure the target distance and elevation as follows: Stadia line separation = 1/100 of the focal m, distance.

w1-W' When the telescope is horizontal: ub' Read the distance ( 1 ) on the staff between the two stadia lines, and the centre value, h2.

Horizontal target distance L= 100 x l Target height difference Ah = h, - h2

When the telescope is slanted: Read the distance ( I ) on the staff between the two stadia lines, the vertical angle, and the centre value, h,.

Horizontal target distance L = l 0 0 X f X sin*$z or 100 X & xcos2$v

Target height difference Ah = 5 0 x f xsin2$z+hl - h2

A-, or 5 0 x & xsin2$v+h, - h2

b) Turn the telescope vertical fine motion screw until the target is on the lower part of the reticle B. Check that the target is still positioned centrally within the vertical lines.

If the target is off-centre, the following adjustment should be performed:

Adjusting screws @ Unscrew and remove the telescope reticle

adjustment cover @ . @Very slightly loosen one vertical and one

horizontal adjusting screw by a certain amount.

@ Place a small piece of plastic or wood against one side of the top adjusting screw mount as a buffer.

@ Look through the eyepiece and gently tap the piece of plastic or wood to rotate the

..= 1 +-et=-- reticle slightly. @ @ Re-tighten the two adjusting screws (loo- sened in @) by the same amount.

WARNING: Over-tightening the adjusting screws may damage the reticle. Unequal tightening of the adjusting screws may mean that the reticle will go out of adjustment.

($3 Check the reticle perpendicularity again using procedures a) and b) above and repeat the adjustment if necessary. Replace the reticle adjustment cover. 0 After this adjustment, the vertical and

horizontai reticle line positions should be checked as follows:

C f) Loosen the horizontal clamp and turn the upper part through 180".

/ ! V g$g$g~'-~:I If the displayed vertical angle is not 90" / H" fi>fii?g" I f 5", repeat procedures b)-f) once more.

If the display can not be brought to 90" k5" by this method, the sensor index should be adjusted as follows:

@Leaving the instrument in position f), remove the sensor index adjustment cover.

@ Using a suitable flat-head screwdriver, adjust the internal dial until the upper display is 90°00'00".

@Check the adjustment by repeating procedures b)-f). Re-adjust if necessary until the display shows a value within 90" k5" for any position of the upper part. Replace the adjustment cover.

1 1.4 Reticle

Note: The adjustments in this section are very delicate. If you experience any difficulties, please contact your SOKKIA agent. Before this procedure, check the vertical index as in 11.3.

11.4.1 Perpendicularity of the reticle to the horizontal axis

a) Carefully level the DT4. Select and sight a clear target on the upper part A of the reticle line.

10. DT4 WITH EDM: ANGLE AND DISTANCE MEASUREMENT

10.1 EDM combinations and mounting

10.1.1 Combinations

1) The DT4 can be operated as a total station when combined with the REDmini2 or RED 2A/L EDM as follows:

REDmini2 -=3f

SB131

Mounting m plate 1 S827 a a Spacers S599

BDCl 1A or BDC12

* When using the telescope mounted REDmini2, use the external battery BDCllA or BDC12. (The DT4 BDC2l battery should be left in place to balance the weight on the axes.)

I Use the DT4 only in the combinations shown here.

(When combined with other instruments, or in combinations other than those shown here, the DT4 may not display the correctly reduced horizontal distance and height difference, due to EDM mounting eccentricity.)

10.1.2 Telescope mounted system: (DT4 and REDmini2)

1) The mounting procedure for the REDmini2 telescope-mounted system can be found in the REDmini2 operator's manual. (Also see combinations diagram on the previous page.) Only use: REDmini2 counterweight SB131

Telescope mount SB27 EDM/DT4 connecting cable DOC15 (0.2 m)

Note: The telescope mount SB27 should be attached to the telescope in the face left position.

2) Instructions for the horizontal alignment adjustment between the DT4 and REDmini2 can be found in the REDmini2 operator's manual.

3) Only use target/prism set APSI 4. Instructions for target and prism height adjustments can be found in the AP series manual.

Note: DT4 Instrument height = 236 mm DT4 telescope/EDM separation = 88 mm

11.3 Index error of the tilt angle sensor

a) Carefully level the DT4, switch on and index the horizontal and vertical circles. Ensure that parameter 3 is set to option F0 (see page 38). i.e. Automatic vertical compensation is available. The ,If symbol is displayed.

C b) Loosen the horizontal clamp and turn the

upper part until the telescope is perpendicular to a line between levelling screws A and B.

0 SET

c) Press pFFT m to set the horizontal angle L to zero.

Use the vertical clamp and fine motion screw to adjust the telescope to the horizontal position. i.e. vertical angle (0" at zenith) reads exactly 90°00'00".

d) Loosen the horizontal clamp and turn the upper part through 180" t 5 ' .

H" :g33333 &5", correct half of the deviation with -- levell~ng screw C.

I e Error .) Correct halt = -70" = +in',

If the bubble is not still centred, adjust as follows: @ Use leveil~ng screws @Correct half of the bubble displacement -1 using levelling screw C.

i* 1/2

@ Use adjusting pln @C~rrect the remaining half displacement with the adjusting pin.

"+ Centre Note: Bubble moves away from a clock- - wise rotation of the adjusting screw.

@Repeat the procedures from a) untir the bubble remains centred for anv oosition of the upper part.

11.2 Circular level

a) Perform the plate level adjustment as in 11.7, or carefully level the plate level.

b) Check the position of the circular level bubble.

If the bubble is off-centre, adjust as follows: @ Note the off-centre direction of the bubble.

adjusting @ Loosen the adjusting screw farthest from this direction to centre the bubble.

@ Adjust all three adjusting screws until the tension of each screw tightening is the same, and the bubble is centred.

WARNING: Over-tightening the adjusting screws may damage the circular level. Unequal tightening of the screws may mean that the bubble will go out of adjustment.

10.1.3 Standards yoke mounted system (DT4 and REDmini2 or RED2AlL)

1) The mounting procedure for the REDmini2 or RED2AlL standards-mounted system can be found in the relevant EDM operator's manual. (Also see combinations diagram on page 21 of this manual.) Only use: Spacers SB99

EDMlDT4 connecting cable DOC16 (0.4 m)

2) Instructions for the horizontal alignment adjustment between the DT4 and REDmini2 or RED2AlL can be found in the relevant EDM operator's manual.

3) Only use target/prism set APS13, APS35 or APS36. Instructions for target and prism height adjustments can be found in the AP series manual.

Note: DT4 instrument height = 236 mm DT4 telescope1EDM separation = 194 mm

10.2 Simultaneous angle and distance measuring procedure 11. CHECKS AND ADJUSTMENTS (Preparation for distance measurement)

1) Remove the carrying handle. Level and centre the DT4 over the survey-

standards ing point, and ensure that it is switched off. mountlng

2) EDM prism constant and atmospheric Q corrections: REDmini2: REDmini2 instruments (s/n

mount~ng Battety 8001 -) with SF9A keyboard and DOC19 D C ~ 1 adaptor can change their prism constant and

ppm values. However, earlier REDmini2 instruments have a fixed - 30 mm prism constant correction and 0 ppm values. Refer to your REDmini2 Operator's manual for more details. RED2A/L: Check the RED2A/2L prism constant switch position. Set the ppm dial. (Refer to the RED2A/L manual for more details)

3) EDM power supplies: REDmini2: Telescope mounted: Connect the external battery BDCIIA or BDC12 to the DT4 external power source connector @ with the cable EDC3.

Or l A Standards mounted: Mount the BDCI 8 battery in the holder. RED2A/L: Mount the BDCI 1 battery in the RED2A/L.

4) Mount the REDmini2 or RED2A/L on the DT4.

5) Connect the EDM to the DT4 with the appropriate cable DOC15 or DOC16.

6) Switch on the DT4.

It is important that the DT4 is periodically checked and adjusted. In addition, the instrument should be checked after transportation, long storage or when damage to the instrument is suspected to have occurred.

11.1 Plate level

The glass tube of the plate level is sensitive to temperature change or shock. Adjust as follows:

a) Turn the upper part of the instrument until the plate level is parallel to a line between levelling foot screws A and B. Centre the plate level bubble using level-

A B ling screws A and B.

A B

((F]@) Note: The bubble moves towards a clock-

wise-rotated foot screw. Bubble movement

b) Turn the upper part 90". i.e. The plate level is perpendicular to a

line between levelling screws A and B. Centre the plate level bubble using level-

A B ling screw C.

C

c) Turn the upper part though 180" and check the bubble position. If the bubble is still centred, no adjustment is necessary.

A B

10.4 Error codes

If there is any fault in the EDM function, the error codes shown in the following table will be displayed.

measure distances in metres.

measurement.

The EDM did not Check that instrument

The EDM is not Turn the EDM on.

Check that instrument parameter 7 has been set to the correct EDM.

If error codes h, dE d , E :G;;' , E :;;' : , f : : S or 8 : ,' are displayed, see page 19. When the error indication f appears with any number other than the ones above, please contact our agent.

(Indexing vertical and horizontal circles and target/prism sighting)

fTv!?3 7) Index the vertical circle by tilting the telescope through the horlzontal position In face left. lndex the horlzontal circle by rotating the upper part.

8) Switch the EDM power ON. The (D symbol appears on the DT4 display. Set the EDM measuring units to metres.

9) Align the centre of the telescope reticle with the centre of the target. In the standards yoke mounted system, sight the centre of the prism with the EDM telescope. (In the telescope-mounted system, the REDmini2 should already sight the centre of the prism.) Confirm that the reflected signal intensity is adequate by looking for the asterisk mark of the REDmini2 or by checking the signal intensity meter of the RED2A/2L.

(Simultaneous angle and distance measurement) Note: Do not press the EDM measure button during this procedure.

10) Press $?qj on the DT4 to enter the angle m and distance measurement mode.

If tracking measurement mode is required: REDmini2: Press lG-7 g . The TRK

4 L - IF " - 1 symbol appears on the DT4 display.

(Press SHY & to return to measurement mode.) RED2AJL: Use the measurement mode switch on the EDM.

11) Use the key on the DT4 to select kE!l! the required distance mode:

(Vertical angle) Display symbol : Slope distance

(Horizontal angle) Display symbol : Horizontal distance

(Vertical angle) Display symbol : Height difference

12) Press on the DT4 to start the distance measurement.

m The DT4 display flashes to show that distance measurement has been started. The EDM measures the slope distance and

i _L- transmits it to the DT4. The DT4 reads the angles and displays the selected distance (slope, horizontal or height) together with the appropriate angle.

m The key can now be used to recall the remaining distance options.

I$ V g ;? 35:/ Each displayed value is the result calcu-

6 {?SS lated from the most recent distance i measurement.

To return to the angle measurement mode, press PI( and switch the EDM off. (The 0 (and TRK ) symbols disappear from the DT4 display.)

m 13) Press on the DT4 to stop the distance measurement.

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