Convective Module

Flatness Measurement and Analysis System

Download a PDF version of the Convective brochure

The Convective Module sub-room temperature flatness measurement module is used hand-in-hand with Akrometrix' patented TherMoiré technology. The module, when coupled with the TherMoiré system, enables automated phase-stepping analysis and convective cooling and heating. For example, the Convective Module can duplicate test temperatures as required for JEDEC temperature cycling initiative JESD22-A104-B.

The Convective Module is comprised of a heating/cooling chamber assembly that fits into an existing TherMoiré oven chamber and a dual stage air cooler. The system accommodates evaluation of a viewing field as large as 200 mm x 200 mm (8 in. x 8 in.) and uses the fully integrated TherMoiré operating software. Software allows the user to input the thermal profile, temperature points for data acquisition, special purpose composition algorithms, and other information. The system uses this "recipe" to automatically collect, analyze, and store the data for further analysis.

The sample enclosure module contains sample support mounts, thermocouple connections and an insulated tube heater housed outside the sample chamber. The electronics enclosure houses the temperature controls, over-temperature safety shut-off electronics, fusing and power distribution. The standard system power requirement is 220 VAC, 50/60 Hz.

Convective Module Specifications

The Convective Module is an add-on component for the TherMoiré Model PS400 that provides sub-room temperature measurement capabilities to the TherMoiré lineup of products.

Measurement Performance

Sample Size:	200 mm x 200 mm (8" x 8") maximum
Compatible Gratings:	100 line per inch or lower frequency gratings
Resolution:	2.5 micrometers (0.0001 inches)
Repeatability:	Standard Deviation = 2.5 micrometers (0.0001 inches)
Accuracy:	Larger of +/- 2.5 micrometers (+/- 0.0001 inches) or +/- 3% of measurement value

NOTE: Specifications apply to the relative height measurements (e.g. coplanarity) on Akrometrix calibration sample or equivalent high-contrast, uniform reflectivity, continuous surface, using a 100 line per inch grating. Performance specifications are affected by sample surface optical properties and should be confirmed for specific samples of user interest.

Thermal Performance

Temperature Range:	-55 ¼C to 150 ¼C
Heating Rate:	18 ¼C/min from 0 ¼C to 150 ¼C
Cooling Rate:	4 ¼C/min from 20 ¼C to Ð55 ¼C

NOTE: Specifications apply to samples of 0.062" thick FR-4 PCB material. Performance specifications are affected by sample mass, thermal capacity and emissivity and should be confirmed for specific samples of user interest.

Pneumatic

Inlet Air:	Supplied dry air or dry gas with dew point below -100 ¼C
Inlet Port:	3/8" quick disconnect plug (others available upon request)
Flow Rate:	1 cfm; 6 cfm maximum (28 lpm; 170 lpm maximum)

Electrical

Flow Rate:	1 cfm; 6 cfm maximum (28 lpm; 170 lpm maximum)
Incoming Service:	220 VAC, 50Hz, 15A

Mechanical

CoolMoiréTM Cabinet:	Dimensions:	24" x 25" x 48" (61 x 64 x 122 cm)
	Weight:	155 lbs (70 kg)
CoolMoiréTM Sample Enclosure:	Dimensions:	11.5" x 10" x 3" (29.2 x 25.4 x 7.6 cm)
	Weight:	7 lbs (3.2 kg)