# To measure rounds of observations

This topic describes how to measure multiple sets (rounds) of observations with a conventional instrument. You can measure one or more rounds of observations, and also one or more sets of observations per point per round.

1. Tap and select Measure / Measure rounds.
2. Tap Options to configure the rounds options. See Station setup plus, resection, and rounds options.

Before you start measuring points, make sure that the Face order and Sets per point settings are correct. You cannot change these settings after you start measuring points.

3. Build the rounds list by observing each point to include in the round on the first face. Follow the same procedure as for measuring a topo point.

   If you measure to static targets when there are two prisms close together, use FineLock or Long Range FineLock technology.

   If you are using a Trimble VX spatial station or Trimble S Series total station and the measurement is likely to be interrupted, for example, when measuring in traffic, select the Interrupted target measurement check box in the Target controls screen.

   Make sure you enter the correct target height and prism height as you measure each point. You cannot change these values in subsequent rounds.

4. To start measuring rounds:
   1. Tap End face.

   2. If you are using a servo or robotic instrument to measure a known (coordinated) point, tap Turn. Alternatively, to automatically turn a servo instrument to the point, set the Servo auto turn field in the survey style to HA & VA or HA only.

      When using servo or robotic instruments, check that the instrument has sighted the target accurately. When measuring a DR target with a Trimble total station with automated rounds, the software pauses to allow you to sight to the target. You must manually sight and measure the point to continue.

   3. When the end of the rounds list is reached, if points have been skipped the software prompts you to return to observe the points that were skipped during that round. The observations can be skipped again if required.

   As you measure rounds, the software:

   - Defaults to the correct point details for each observed point.
   - Shows the current face observations, the number of the current set and the total number of sets to be measured (shown in brackets) and the number of the current round the total number of rounds to be measured (shown in brackets).

     For example, "Face 1 (2/2) (1/3)" shows that the instrument is on face 1 of the second set of two sets and the first of three rounds.

   - Directs you to change face when required. With a servo instrument, this happens automatically.
   - Automatically turns and measures when using Autolock or FineLock technology, and Automated rounds is enabled.
5. When all observations are complete, the Standard deviations screen appears. To review the standard deviations of the observations and remove bad observations, see Reviewing standard deviations after rounds.
6. To save and exit rounds, tap Close. Tap Yes to confirm.