#### 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 is intended to show how PC-DMIS manages calibration for each port type.

Once you click Calibrate the following message box appears:

PC-DMIS MESSAGE: Each FCR25 unit contains 3 ports. Different types of physical racks can hold varying numbers of FCR25 units. The current rack is configured to have a total of 3 ports, which means it should have 1 FCR25 units. Please shim open all the lids and remove all modules and styli from the ports.

1. Read the instructions from the preceding prompt, and verify that you have the correct number of ports and FCR25 units (a unit is a set of three ports).

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 a shim between ports 2 and 3, holding open their lids. Without a shim, the lids will shut, as you can see in port 1. |

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

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

In the next step, PC-DMIS will measure Port 1.

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