5. Insert the blue pen fully into the lower (humidity) holder and the red pen fully
into the upper (temperature) holder.
If you installed the pens correctly, you will hear a click as they position
themselves in the holders. Figure 2-13 shows how to insert the pens.
6. Close the recorder door.
Figure 2-13. Pen Installation
2.5.2 Removing the Pens
1. Check to see that the pens are offset as shown in Figure 2-10. Otherwise, you
can damage the arm and drive mechanism if you try to remove them.
DO NOT ATTEMPT TO OFFSET THE PENS MANUALLY (BY
HAND). THE DRIVE MECHANISM COULD BE DAMAGED.
DO NOT ATTEMPT TO CHANGE THE PENS WHILE THEY
ARE IN MOTION.
2. Perform Step 2b in Section 2.5.1 to offset the pens.
3. With a screwdriver in one hand, push on the rectangular area of the pen shown
in Figure 2-14. Using the other hand, release the pen from the spring clip
attached to the pen holder.
Figure 2-14. Pen Removal
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