Carrier 69NT40-511-300 Operation And Service page 91

6.23 ELECTRONIC PARTLOW TEMPERATURE
RECORDER
The microprocessor based temperature recorder is
designed to interface with the DataCORDER to log
temperature with time. The electronic recorder will
automatically record the return air, supply air, or both,
based on the setting of temperature controller
configuration code CnF37, refer to Table 3-4. The
recorder reads and records data from the Controller in
present time, under normal operating conditions.
If using the Electronic Partlow Recorder CTD P/N
12-00464-00:
The recorder will STOP when the power is OFF, and the
pen tip will remain at the last recorded temperature on
the chart. When power is applied, and the power off
period is less than three days; the pen tip will move to
25°C (77°F), the chart will advance to present time, and
the pen tip will move to the currently recorded
temperature.
If the power has been OFF for more than three 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.
If using the Electronic Partlow Recorder CTD P/N
12-00464-01:
The recorder will STOP when the power is OFF, and the
pen tip will remain at the last recorded temperature on
the chart. When power is applied, and the power off
period is less than two days; the recorder will retrieve the
logged data from the DataCORDER for the power off
period and record it onto the chart, thereafter, the
recorder will resume normal temperature recording.
If the optional DataCORDER battery pack is being used,
and the charge is too low to enable recording during the
power off period of less than two days, the pen tip will
move to below the inner chart ring for the period when
NO data was recorded by the DataCORDER.
If the power has been OFF for more than two 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.
If using the Electronic Partlow Recorder CTD P/N
12-00464-02:
The recorder will STOP when the power is OFF, and the
pen tip will remain at the last recorded temperature on
the chart. When power is applied, and the power off
period is less than two days; the pen tip will mark a spike
to 25°C (77°F), the recorder will retrieve the logged data
from the DataCORDER for the power off period and
record it onto the chart, thereafter, the recorder will
resume normal temperature recording.
If the optional DataCORDER battery pack is being used,
and the charge is too low to enable recording during the
power off period of less than two days, the pen tip will
move to below the inner chart ring for the period when no
data was recorded by the DataCORDER.
If the power has been OFF for more than two 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.
6.23.1Replacing the Recorder
a. Turn power to the unit OFF.
b. Open the recorder door (item 1, see Figure 6-31).
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.
6.23.2Changing the Chart
a. Lift the stylus (item 5, Figure 6-31) 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).
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.
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.
g. Gently lower the stylus arm until the pen tip (item 4)
comes in contact with the chart.
6-23
NOTE
CAUTION
T-285