9018-18076.pdf.pdf - 第32页
5-4 Site Preparation 5 Environmental Requirements Humidity Requirements The system is designed to operate in the range fr om 5% to 80% relative humidity (non-condensing). If the sy stem is subje cted to con densation , a…
Environmental Requirements 5
Site Preparation 5-3
Air Temperature Requirements
Table 5-7 summarizes the temperature and cooling requirements for the system. For details, see:
• Air Temperature Specifications
• Cooling Requirements
Air Temperature Specifications
The Medalist ICT system is designed to operate uninterrupted in an area where the air temperature is
stable and in the range from 0°C to 40°C (32°F to 104°F), as measured at the tester-to-fixture
interface.
The system has a built-in temperature sensor inside the testhead, located on the ASRU card. This
sensor constantly monitors the temperature of the air that has been drawn through the testhead after
it cools the system components. If the temperature sensor finds that the air temperature inside the
testhead has changed ±5°C (±9°F) since the last time the system ran AutoAdjust All, it will run
AutoAdjust All again. Therefore, to ensure uninterrupted use, it is important that the ambient room
temperature remain reasonably stable.
If the sensor finds that the air temperature inside the system is too high, the system will shut down;
typically, the over-temperature shutdown point is 55°C (131°F). See Cooling Requirements for
information on air conditioning requirements.
Cooling Requirements
Design the site cooling capability using the heat dissipation estimates in Table 5-8. The numbers are
for testheads with fully loaded modules and fully loaded support bays.
Table 5-7 Temperature and humidity ranges for operation and storage
Operating Temperature Operating Humidity Storage Temperature
Testhead 0°C to 40°C (32°F to 104°F) 5% to 80% non-condensing -40°C to 70°C (-40°F to 158°F)
Support Bay 0°C to 40°C (32°F to 104°F) 5% to 80% non-condensing -40°C to 70°C (-40°F to 158°F)
Controller 5°C to 45°C (41°F to 113°F) 20% to 80% non-condensing -40°C to 65°C (-40°F to 149°F)
The air temperature inside the system is not considered stable until the system has
been powered for at least 30 minutes.
Table 5-8 System heat dissipation
Number of Modules Dissipation
1 module 10500 BTU (3.1 kW)
2 modules 19700 BTU (5.8 kW)
3 modules 28500 BTU (8.4 kW)
4 modules 3700 BTU (10.9 kW)
5-4 Site Preparation
5 Environmental Requirements
Humidity Requirements
The system is designed to operate in the range from 5% to 80% relative humidity (non-condensing).
If the system is subjected to condensation, as if moved from a cold loading dock into a warm
environment, allow at least 24 hours for the system to recover before powering up.
