Frequently Asked Questions

Over what temperature range is a THERMAL TEST FIXTURE typically used?

The standard THERMAL TEST FIXTURE temperature range is -60° to 160° C to accommodate the most frequent applications. For MilSpec Testing the temperatures may range from -55° to +125° C. A THERMAL TEST FIXTURE can be configured for moisture-free testing from -80° to +225° C, depending upon the thermal air source to the THERMAL TEST FIXTURE.

How True and Accurate are THERMAL TEST FIXTURES?

Controlling temperature with precision at the device case is a major benefit of THERMAL TEST FIXTURE. The DUT is isolated in a localized enclosure (at temperature) with the thermal air circulated around the device under test or DUT. This process brings the device/assembly to temperature and therefore reduces soaking time. Tester interface utilizes impedance-matched connections to ensure true and accurate test signals between the tester, the THERMAL TEST FIXTURE, and the DUT.

Will the THERMAL TEST FIXTURE interface with my tester?

THERMAL TEST FIXTURES are compatible with all major testers and rack and stack test equipment including:  Advantest, Analog Devices, GenRad, Hewlett Packard, IMS, Interpro, IMS, LTX, Tektronix, Teradyne, Schlumberger, SZ Testsysteme, and Wayne Kerr among others. Standard and application-specific tester interfaces are available.

Can the THERMAL TEST FIXTURE be used with more than one DUT or PCB?

Yes! THERMAL TEST FIXTURES can be universal for testing one or more similar devices, by simply swapping out the internal DUT socket/printed circuit board. This modular style is cost-effective and convenient for the user. A THERMAL TEST FIXTURE can also be designed to hold multiple similar DUT’S for testing simultaneously.

Can a THERMAL TEST FIXTURE be used for non-temperature testing?

Yes! THERMAL TEST FIXTURES are designed for use in both temperature and non-temperature test applications. A THERMAL TEST FIXTURE is also available with and without the turnkey tester interface

While my DUT is at temperature, will the test equipment also be subject to test temperatures?

No. While the DUT is isolated for testing at temperature, a layer of insulation (between the DUT and the tester) protects the tester from temperature extremes, enhancing test reliability.

Can The TEST SYSTEM DIVISION support unique applications and
tester interfaces?

Founder Tony Khoury has a large portfolio highlighting just some of the unique applications for frost-free thermal testing and/or tester interfaces for subjects of all shapes, sizes and electronic characteristics. With unmatched expertise in the design of standard and specialized tester interfaces and frost-free thermal enclosures, our engineers provide reliable, turnkey solutions; quickly and cost-effectively.

What information should be specified when requesting a THERMAL TEST FIXTURE quote?

TEST SYSTEM DIVISION engineers will need to know:

1) What item is being tested (component, PCB, module, hybrid, MCM, high power device, array).

2) The size of the DUT (Device Under Test).

3) Temperature range requirements.

4) The name of the tester or rack & stack test equipment to which the THERMAL TEST FIXTURE will interface, if applicable
5) The thermal source

6) Any special characteristics of the subject to be tested (high power, high speed, RF, microwave) or the test equipment.

What flexibility does THERMAL TEST FIXTURE bring to my testing?

1) Test a device, hybrid, PCB or assembly of any size, shape or electronic characteristic (high power, high frequency to 40 GHz) at precise temperature in a controlled thermal environment. Air source system owners expand the use of their systems.

2) Extend moisture-free test times: Perform cold testing over longer time periods with no condensation on the DUT or the tester.

3) With the optional patented probe-through window, an operator can see and probe devices on a PCB under test, at temperature (-55° /+125° C).