#### Step 5 - Prepare for Calibration

Note: The Calibration process may vary slightly depending on the types and locations of the inserts for each port. The process described here merely intends to show how PC-DMIS manages calibration for each port type.

Once you click Calibrate the following message box appears:

PC-DMIS MESSAGE: Please click OK, then ship open all the probe changer lids and remove all probes from the rack before proceeding with any measurement. Note: You can safely ignore any cycle or lock errors that might occur on the rack status indicator lights during this calibration.

1. Read and follow the instructions from each prompt.

2. Open the lids to each port and insert shims with the large end of the shims towards the back of the slots to hold them open.

A "shim" is a tapered piece of plastic that fits in between two ports to hold open their lids. The picture to the right shows a close-up view of shims between multiple adjacent ports, holding open their lids. Without a shim, the lids will shut. |

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

ACR1 Probe Changer showing slots empty, held open with shims

4. Click OK when you are ready to measure Port 1.

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