Usda Cold Treatment; Usda Cold Treatment Procedure; Figure 13. Data Reader - Carrier 69NT40-489-100 Series Operation And Service Manual

25 14 32.0 F
14:00
HOURS
25 DAYS BACK FROM TODAY
(If today is the 30th, this would
be from the 5th)
4. Each press of the DOWN ARROW key displays the
temperature one hour earlier while each press or the
UP ARROW displays the temperature one hour ear-
lier.
5. Use the ENTER key to alternate between sensors
and times/temperatures. Use the ARROW keys for
scrolling. The display will return to normal if 15 sec-
onds lapse without a key being pressed.
b. DataReader
The Carrier Transicold Data Reader (see Figure 13) is a
simple to operate hand held device designed to extract
data from the DataCORDER and then upload it to a
personal computer. The Data Reader has the ability to
store multiple data files. Refer to Data Retrieval manual
62-10629 for a more detailed explanation of the
DataReader
DataReader

Figure 13. Data Reader

c. DataLINE
The DataLINE software for a personal computer is
supplied on both a floppy disk and CD. This software
allows interrogation, configuration variable assignment,
screen view of the data, hard copy report generation,
cold treatment probe calibration, cold treatment
initialization and file management. Refer to Data
Retrieval manual
www.carrier.transicold.com
explanation of the DataLINE interrogation software.
T-305
SENSOR READING
62-10629 or
for a more detailed
d. Communications Interface Module
The communications interface module is a slave
module which allows communication with a master
central monitoring station. The module will respond to
communication and return information over the main
power line.
With a remote monitoring unit installed, all functions and
selectable features that are accessible at the unit may
be performed at the master station. Retrieval of all
DataCORDER reports may also be performed. Refer to
the master system technical manual for further
information.

3.6.11 USDA Cold Treatment

Sustained cold temperature has been employed as an
effective postharvest method for the control of
Mediterranean and certain other tropical fruit flies.
Exposing infested fruit to temperatures of 2.2 degrees
Celsius (36_F) or below for specific periods results in
the mortality of the various stages of this group of
insects.
In response to the demand to replace fumigation with
this environmentally sound process, Carrier has
integrated Cold
microprocessor system. These units have the ability to
maintain supply air temperature within one-quarter
degree Celsius of setpoint and record minute changes
in product temperature within the DataCORDER
memory, thus meeting USDA criteria. Information on
USDA is provided in the following subparagraphs:
a. USDA Recording
A special type of recording is used for USDA cold
treatment purposes. Cold treatment recording requires
three remote temperature probes be placed at
prescribed locations in the cargo. Provision is made to
connect these probes to the DataCORDER via
receptacles located at the rear left-hand side of the unit.
Four or five receptacles are provided. The four three-pin
receptacles are for the probes and fifth, five pin,
receptacle is the rear connection for the the Interrogator.
The probe receptacles are sized to accept plugs with
tricam coupling locking devices. A label on the back
panel of the unit shows which receptacle is used for
each probe.
The standard DataCORDER report displays the supply
and return air temperatures. The cold treatment report
displays USDA #1, #2, #3 and the supply and return air
temperatures. Cold treatment recording is backed up by
a battery so recording can continue if AC power is lost.
b. USDA/ Message Trip Comment
A special feature is incorporated which allows the user
to enter a USDA (or other) message at the head of a
data report. The maximum message length is 78
characters. Only one message will be recorded per day.

3.6.12 USDA Cold Treatment Procedure

The following is a summary of the steps required to
initiate a USDA Cold Treatment.
a. Calibrate the three USDA probes by ice bathing the
probes and performing the calibration function with
the DataReader or a personal computer. This calibra-
tion procedure determines the probe offsets and
stores them in the controller for use in generating the
cold treatment report. Refer to the Data Retrieval
manual 62-10629 for more details.
b. Pre-cool the container to the treatment temperature
or below.
28
Treatment capability into its