Current Help System: PC-DMIS Portable (View Core Help)

### Measuring Points with a T-Probe

The T-Probe represents a free movable target device to measure with the Laser Tracker and the T-Cam simultaneously. The reflector in the center of the T-Probe is responsible for providing the initial distance measurement of the Absolute Distance Meter (ADM) and the tracking measurement of the Interferometer (IFM). It also receives system command and control signals from the tracker.

Note: See the documentation that came with your T-Probe for detailed information.

Ten (10) IR LEDs with unique IDs are distributed on the T-Probe to provide real-time feedback for measurement procedures. The T-Probe is working in either measurement mode or communication mode. Measurement mode provides that when the laser beam is locked on the reflector that measurements can be taken. Communication mode uses strobing sequences from the LEDs to communicate information back to the LT controller.

Before measurement can take place, the T-Probe battery indicator must be solid green (when connected to the tracker with a cable) or flashing green (using a battery without a cable), and the status indicator must also be green.

Note: The TProbe is (unlike reflectors) automatically recognized by PCDMIS and thus no other one should be selected from the probe combo boxes. PCDMIS will mark the currently active TProbe in the Probes List of the Settings Toolbar by displaying it in BOLD. If you select a different probe from the list that isn't the physically active TProbe and then take a hit, a warning message will be displayed. It is recommended to always use the probe settings of the physically active probe, otherwise your hit data might not be properly corrected for the ball diameter and offset.

To Measure Points:

1. Attach the needed stylus to the T-Probe.

2. Switch on the power to the T-Probe.

3. Capture the laser beam in the T-Probe reflector. The Leica T-Probe will automatically be detected by PC-DMIS. The serial number of the T-Probe, the stylus assembly and the respective mount is visualized in the Settings toolbar and in the Graphics Display window.

Detected T-Probe Serial Number 252, Stylus Assembly 506, Mount 1

4. Move to the location of the point to be measured while maintaining the laser beam visibility.

5. Record a hit or execute a scan according to the "T-Probe Button Assignments".

Note: If the RMS value for a hit is out-of-tolerance as defined by the "RMSToleranceInMM" value the action specified by the "RMSOutTolAction" will be executed. The available actions are: 0=Accept hit, 1=Reject hit, 2=Prompt to accept or reject hit. These two values are found in the "USER_Option" section of the PC-DMIS Settings Editor.