Teledyne 4220 - Manual (Page 142)

4220 Flow Meter
Section 6 Maintenance and Service
6-8
6. Remove the feed spool by pulling on the handle extending
from the right side of the printer.
7. Snap off the other white end cap as described previously.
Save the white end caps; you will reuse them.
8. Remove the empty roll from the spool by holding the han-
dle in one hand and pulling the roll from the spool with the
other.
To install the new chart paper:
After you remove the empty roll,
1. Slide the new roll onto the feed spool so it unrolls from the
back side - facing away from you.
2. Line up the slots in the cardboard tube with the raised
guides on the spool.
3. Reattach the white end cap by wedging the two catches on
the end of the spool into the two slots on the white end cap.
4. Peel the paper back gently so it will unroll freely. Using the
knife or scissors, cut off the end of the roll if it is torn.
5. Fold the paper over on itself so the end is straight and
stiffer than a single layer of paper would be.
6. Unroll a few inches of the paper and set the roll on top of
the cabinet.
7. Use your fingers to feed the paper down the back of the
internal printer to where it touches the roller. Make sure
the paper gets past the lever for the paper sensing switch.
8. Press the Chart Advance key and hold it until the paper
comes through the printer mechanism.
9. When the paper comes through, reinstall the feed spool
with the new roll on it by snapping it into the printer
assembly.
10. Run a few inches through the printer, using the Chart
Advance key; then unfold the end.
11. Put the cardboard tube from the empty roll on the take-up
spindle and reattach the white end cap by wedging the
catches on the end of the spool into the two slots on the
white end cap.
12. Use the piece of tape to attach the end of the new paper to
the cardboard tube from the old roll.
13. Roll some of the paper onto the spool so that it will wind
clockwise, facing away from you. Then reinstall the
take-up roll into the top of the printer.
14. Be careful to push it all the way back in, so that the
take-up gear on the end of the spool assembly will reen-
gage.
15. When the take-up spool is back in place, push the Paper
Reroll key; this will remove any slackness in the paper.