Thermo King 098203, Руководство по обслуживанию

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Operating Theory
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Unit Requirements
To activate CT the unit must have:
• 1-3 UDSA or Cargo sensors
• Battery (Battery is required for off power logging).
Activating Cold Treatment
• Go to the Configuration > Options Menu enter CT Feature and turn it ON.
Figure 108: Turn CT Feature On
Calibrate Probe (Optional)
Setting the USDA Type in the Configuration menu activates spare sensors 1, 2, 3 and 4 for USDA Cold
Treatment Temperature Recording. USDA sensor temperatures are recorded in the datalogger memory.
The USDA sensors should be connected to the controller and located in the load as shown in USDA
directives. When a USDA sensor is installed, the controller will automatically detect each sensor and
activate data logging. However, the USDA Type screen in the Configuration menu
must be set to the
correct sensor setting and each USDA sensor must be calibrated to comply with USDA temperature
recording requirements. Calibrate the sensors in an ice bath. MAGNUM units equipped for NTC style
USDA sensors require USDA sensor P/N (refer to Tool Catalog). MAGNUM units equipped for PT100
style USDA sensors require USDA sensor P/N (refer to Tool Catalog).
Ice Bath Preparation
1. The ice bath should consists of an insulated container full of ice made from distilled water with
enough distilled water added to cover the top of the ice during the test. A properly filled ice bath
should be completely filled with ice all the way to the bottom of the container.
2. Stir the ice bath briskly for one minute before proceeding.
3. Insert the USDA sensors in the ice bath. Wait 5 minutes to allow the sensor temperatures to stabilize
at 0 C (32 F).
4. Stir the ice bath frequently. As an option, test and verify ice bath temperature with a meter or
measuring device meeting your accuracy requirements. Stirring 10 seconds every 3 minutes during
the test procedure is adequate.
Calibrating the USDA Sensors
1. Insert all USDA sensors in an ice bath (see “Ice Bath Preparation” above).