Figure 6-27. Electronic Partlow Temperature Recorder - Carrier 69NT40--541--200 TO 299 Operation And Service

1
If the power has been OFF for more than thirty days, the
recorder will NOT re--synchronize (the chart will not
advance to present time), the pen tip will move to the
currently recorded temperature, and the recorder will
resume normal temperature recording.
6.24.1Replacing the Recorder
a. Turn power to the unit OFF.
b. Open the recorder door (item 1, see NO TAG).
c. Locate the connector below the recorder, and
squeeze the ears together to disconnect the plug,
(item 6).
d. Remove the four mounting screws (item 8), and
remove the recorder.
e. Install the new recorder by reversing the above
steps.
6.24.2Changing the Chart
NOTE
To prevent recorder corrosion, it is important to
assure the door is securely closed at all times
after completing the chart change.
a. Lift the stylus (item 5, NO TAG) by grasping the arm
near the base, and pull the arm away from the chart
until it snaps into its retracted position.
b. Remove the chart retaining nut (item 10), remove
the used chart, and record today's date on the old
chart.
c. Press the "Change Chart" button (item 2).
T--317
3
2
10
9
8
7
6

Figure 6-27. Electronic Partlow Temperature Recorder

4
5
Failure to press the change chart button, when
changing a chart with the power OFF, may
result in the chart advancing when power is
applied.
d. Install a new chart, make sure the chart center hole
is placed over the center hub, and the chart edges
are behind the four hold down tabs (item 9).
e. Mark today's date, container number, and other
required information on the new chart and install
under hold down tabs.
f. Replace the chart nut loosely, rotate the chart until
the correct day is aligned with the "start arrow," and
hand tighten the chart nut.
g. Gently lower the stylus arm until the pen tip (item 4)
comes in contact with the chart.
Do not allow the recorder stylus to snap
back down. The stylus arm base is spring
loaded, and damage may occur to the chart,
or the stylus force may be altered.
DO NOT move the stylus arm up and down
on the chart face. This will result in damage
to the stylus motor gear.
6.24.3Adjusting the Recorder Stylus
Proper stylus force upon the chart paper is important.
Factory adjustment is 113 to 127 grams (4 to 4.5
ounces). To measure the force, use a spring type gage,
and attach it under the stylus as close as possible to the
6-24
1. Recorder Door
2. Change Chart
Button
3. Recorder Box
4. Pen Tip
5. Stylus Arm
6. Connector
7. Calibration Button
(Located underneath)
8. Mounting Screws,
#10-24 x 7/16 inches long
9. Hold Down Tab
10. Chart Retaining Nut
NOTE
CAUTION