64-bit Intel Xeon Processorwith 1MB L2 Cache Thermal/Mechanical Design Guidelines

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64-bit Intel
®
Xeon™ Processor MP with 1 MB L2 Cache 37
Thermal/Mechanical Design Guidelines
B Testing Methods
B.1 Case Measurement
Processor cooling performance is determined by measuring the case temperature using a
thermocouple and then applying the corresponding correction offset to this measurement. For case
temperature measurements, the attach method outlined in this section is recommended for mounting
a thermocouple.
Special care is required when measuring case temperature (TC) to ensure an accurate temperature
measurement. Thermocouples are often used to measure TC. When measuring the temperature of a
surface that is at a different temperature from the surrounding local ambient air, errors could be
introduced in the measurements. The measurement errors could be caused by poor thermal contact
between the thermocouple junction and the surface of the integrated heat spreader, heat loss by
radiation, convection, by conduction through thermocouple leads, or by contact between the
thermocouple cement and the heatsink base. To minimize these measurement errors, the approach
outlined in the next section is recommended.
B.2 Supporting Test Equipment
To apply the reference thermocouple attach procedure, it is recommended to use the equipment (or
equivalent).
Table B-1. Test Equipment
Item Description Part Number
Measurement and Output
Microscope Olympus* Light microscope or equivalent. SZ-40
Digital Multi Meter Digital Multi Meter for resistance measurement. Not Available
Test Fixture(s)
Micromanipulator
(See Note below)
Micromanipulator set from YOU* Ltd. Or equivalent
Mechanical 3D arm with needle (not included) to maintain TC
bead location during the attach process.
YOU-3
Miscellaneous Hardware
Loctite* 498 Adhesive Super glue w/thermal characteristics. 49850
Adhesive Accelerator Loctite* 7452 for fast glue curing. 18490
Kapton* Tape For holding thermocouple in place or equivalent. Not Available
Thermocouple Omega*, 36 gauge, "T" Type. 5SRTC-TT-36-72
Calibration and Control
Ice Point Cell Omega*, stable 0 C temperature source for calibration and
offset.
TRCIII
Hot Point Cell Omega*, temperature source to control and understand
meter slope gain.
CL950-A-110
NOTE: Three axes set consists of (1ea. U-31CF), (1ea. UX-6-6), (1ea. USM6) and (1ea. UPN-1). More information available at:
http://www.narishige.co.jp/you_ltd/english/products/set/you-set.htm#3