AccuGrade GPS / Single UTS / Site and Laser Reference v11 for Excavators Universal Total Station - MT900 Caterpillar

Starting the Universal Total Station (UTS) System

Complete the following steps in order to start the UTS instrument and in order to connect the UTS instrument to the system.

1. From any guidance screen, press "UTS".

   The "UTS start-up" dialog appears. The dialog below is used to start an SPS730 or SPS930 instrument.

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Illustration 1	g01646636

2. For SPS730 and SPS930 instruments only, set the "Target ID".

   Complete the following steps in order to set the "Target ID".

   1. Press the "Target ID" soft key.

      The "MT900 Target ID" dialog will appear.

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   Illustration 2	g01418311

   2. Enter the selected "Target ID" into the "Target ID:" field.

      By convention, Target IDs with values from 9 through 16 are used for machine control applications. Target IDs with values from 1 through 8 are reserved for surveying applications. Ask your site manager which Target ID you should use. To set the default value of 9, press the "Default" soft key.

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   Illustration 3	g01645213
   (1) LCD (2) Soft Key Labels (3) Soft Keys (4) Escape Key (5) Next Key (6) Power Key (7) "+" Key (8) Arrow Keys (9) "-" Key (10) "OK" Key (11) Menu Key (12) "Data Card Slot"

   3. Press the "OK" key in order to confirm the settings. In order to exit without saving changes, press the "Escape" key (4) .

      The "UTS start-up" dialog will appear. Refer to Illustration 1

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Illustration 4	g01646636

3. Set the auto search status as required.

   If auto search is turned on and the instrument loses the lock on the target, the instrument will automatically attempt to locate and lock onto the target again by searching the area bounded by the search window defined during instrument set up.

4. Press "Raise Mast" and/or "Lower Mast" in order to position the mast so that there is a clear line of sight between the target that is on the machine and the instrument.

   Note: Keep the mast low enough to minimize mast vibration.

5. Press "Start".

   The instrument system starts. Then, the instrument will automatically search for the target in the area bounded by the search window that is defined during instrument set up.

   When the target is acquired, the "instrument" dialog changes to its "Tracking" layout. Refer to Illustration 5.

   Note: If the instrument takes too long to find the target, press the "Escape" key (4) in order to stop the search and stop the instrument start-up.

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Illustration 5	g01646653

6. Press the "OK" key (10) in order to confirm the settings. In order to exit without saving changes, press the "Escape" key (4) .

   A guidance screen will appear.

Note: The state of the power supply for the SPS730 or the SPS930 is automatically measured and displayed in the "UTS Battery" field. If an external battery is used in order to power the instrument, the instrument battery status is not available.

UTS Set Up Problems

Reacquire UTS Lock

If the UTS loses the lock on the target while you are working, the "No UTS Data" message flashes on the guidance screen. Complete the following steps in order to reacquire the lock on the target.

1. Stop the machine as soon as safely possible, in clear view, and within 15.0 m (50.0 ft) to 300 m (1000 ft) of the UTS.

   Note: The target must be within the search window defined during UTS set up, otherwise you will be unable to acquire lock.

2. If "Auto Search" is enabled, then wait for the UTS to reacquire a lock on the target. Otherwise, from any guidance screen, press "UTS".

   The "UTS" dialog will appear.

   Use one or more of the following tools in order to reacquire a lock on the target.

   • To initiate a search of the entire search window, press "Search".

   • To initiate a search of an area of the search window within 20.0 m (66.0 ft) horizontally and 10.0 m (33.0 ft) vertically of your last known position, press "Quick Search".

MT900 Universal Total Station (UTS) Target Status Indicators

Illustration 6	g01418331
(20) Status Indicator

The status indicators show if the unit is receiving power and functioning correctly. There are four status indicators that are visible. Illustration 6 shows the location of the status indicators for the MT900 Target.

The status of the MT900 Target is shown by the indicator patterns. Refer to Table 2.

UTS Diagnostics

To view detailed UTS diagnostics, complete the following steps:

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Illustration 7	g01896319

1. From the "Diagnostics" dialog, press "UTS".

   The "Diagnostics - UTS" dialog appears.

   The first "Diagnostics - UTS" screen is the "Machine Target" screen. The "Machine Target" screen is the screen that appears if you press "Machine Target". The fields in this screen are explained in Table 4.

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   Table 4

   Field	Explanation
   Northing Easting Elevation	The computed location of the target in terms of northing, easting and elevation
   Slope distance Horizontal angle Vertical angle	The observed location of the target relative to the UTS, in terms of slope distance, horizontal angle and vertical angle.
   Tracking status	UTS tracking status. Refer to Table 5.
   Search window	The position of the target relative to the search window specified during UTS set up.
   Prism constant	The specified prism constant for the target.

   The UTS instrument reports its tracking status to the system. UTS tracking status messages are listed in Table 5.

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   Table 5

   UTS Tracking Status messages
   Tracking Status	Meaning
   N/A	No data being received from the instrument.
   No signal	No target is being tracked.
   Tracking	A target is being tracked.

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Illustration 8	g01898796

2. From any screen in the "Diagnostics - UTS" dialog, press UTS.

   The UTS dialog will appear.

   This screen displays the name of the point at which the UTS insturment was set up, if the point has a name, in the form "UTS <name>". For example, "UTS South". The fields that are within this screen are explained in Table 6.

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   Table 6

   Field	Explanation
   Northing Easting Elevation	The known or measured setup location of the UTS, in terms of northing, easting and elevation
   Compensator	The compensator status
   Scale factor	The scale factor
   Inst. height	The setup height of the instrument
   PPM	UTS "Electronic Distance Meter" (EDM) is affected by the temperature and the pressure at which the instrument is being operated. Accurate entry of the ambient air temperature and barometric pressure correctly adjusts the EDM measurements for the PPM (parts per million) error that is associated with this effect.

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Illustration 9	g01898874

3. From any screen in the "Diagnostics - UTS" dialog, press "Backsight".

   The "UTS Backsight" screen appears. Refer to Illustration 9.

   The "UTS Backsight" screen displays information about the backsight. This information is taken in order to establish the orientation of the UTS instrument. The fields within this screen are explained in Table 7.

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   Table 7

   Field	Explanation
   Northing Easting Elevation	The known location of the control point used for the backsight, in terms of northing, easting and elevation
   Slope Distance Horizontal Angle Vertical Angles	The observed location of the control point relative to the UTS, in terms of slope distance and horizontal angle
   Tracking Status	UTS tracking status. Refer to Table 8.
   Search Window	The position of the target relative to the search window specified during UTS set up.
   Prism Constant	The specified prism constant for the target.

   The UTS instrument reports its tracking status to the system. UTS tracking status message are listed in Table 8.

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   Table 8

   Tracking Status	Description
   N/A	No data being received from the instrument.
   No signal	No target is being tracked.
   Tracking	A target is being tracked.

4. From any screen in the "Diagnostics - UTS" dialog, press "UTS". The UTS dialog will appear.

   This screen displays the name of the point at which the UTS instrument was set up, if the point has a name, in the form "UTS <name>". For example, "UTS South". The fields that are within this screen are explained in Table 9.

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   Table 9

   Field	Explanation
   Northing Easting Elevation	The known or measured setup location of the UTS, in terms of northing, easting and elevation.
   Compensator	The compensator status
   Scale factor	The scale factor
   Inst. height	The setup height of the instrumentC

5. From any screen in the "Diagnostics - UTS" dialog, press "Backsight". The "UTS Backsight" screen appears:

   This screen displays information about the backsight taken to establish the orientation of the UTS instrument. The fields within this screen are explained in Table 10.

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   Table 10

   Field	Explanation
   Northing Easting Elevation	The known location of the control point used for the backsight, in terms of northing, easting and elevation.
   Slope distance Horizontal angle	The observed location of the control point relative to the UTS, in terms of slope distance and horizontal angle.