MAT-04/CA3046 Characterization

[Tim Ressel]

Yo,

I just completed the characterization run. Here are the results:

Chamber	MAT-04	MAT-04	CA3046
Temp		Temp		Voltage	Voltage
39.9		39.9		.5451		.6892
45.0		44.8		.5338		.6803
49.9		49.6		.5227		.6715
55.0		54.7		.5111		.6624
60.0		59.5		.4999		.6535

PS Voltage: 9.98V
Bias resistor: 10.0K 1%

As you can see, the MAT-04 voltage is way different than the CA3046. This info
is useful for setting the bridge voltage on the AN-299 heater scheme. For
example, if you wanted the MAT-04 to run at 40C, you would select a voltage
divider pair to yield .5451 volts, or close to it at least. The stock circuit
yielded 0.6273V. 

Next I am going to run the AN299 circuit with the MAT-04 over temperature to see
how it does. Unfortunately, when I rigged the circuit in the chamber it didn't
work. I somehow blew the MAT-04. The spare is working okay. After I glue the
thermocouple to the back of the new MAT-04 I will begin the next run.

Tim Ressel--Compliance Engineer
Hewlett-Packard
Verifone Division
916-630-2541  
tim_r1 at verifone.com