#### Step 3 - Prepare for Calibration

To begin the calibration procedure for the SP600 Probe Changer, follow these steps:

Probe Changer dialog box - Calibrate tab

1. Select the Calibrate tab from the Probe Changer dialog box.

2. Select TYPE=SP600 from the Active probe changer list.

3. From the Active tip list, select the tip ID to be used for calibration. Most often this will be T1A0B0.

4. Click the Calibrate button to begin.

Once you click Calibrate, the following message box appears:

PC-DMIS MESSAGE: Open all lids and remove any probe from port 1. When ready, please take a hit in the center of the vertical face between ports 1 and 2.

1. Open all the lids by pushing them all the way back and down. Plastic extensions on each side of the lid slide into corresponding holes in the rack surface to keep the lids open.

2. With the lids open, remove all of the modules and styli by sliding them forward out of the ports.

   SP600 Probe Changer showing empty slots held open by plastic extensions on each side of the slot cover that slide into corresponding holes in the rack surface (indicated by the red circles)

3. Click OK when you are ready to take the first measurement.

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