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Device Heater Theory of Operation
Table 1 lists several examples and expected results when using the PD1500A
Heater and Thermocouple. It assumes the following test conditions:
Table 1
Measurements Using Heater and Thermocouple
Temperature(s)
Heater
Specified
Activated
(in PD1000A
(in PD1000A
Software)
Software)
50
C
YES
50;60
C
YES
50
C
NO
50
C
NO
50
C
NO
50
C
YES
50
C
YES
50
C
YES
1NaN means "Not a Number" – valid number (temperature) is missing.
Keysight PD1500A Double-Pulse Test System
– Gate High Voltage: 18 V
– Gate Low Voltage: -2 V
– V
: 300 V
DS
– I
: 10 A
D
– Tolerance: 20%
– Temperature Range: 1
– Temperature Timeout: 30 S.
Thermocouple
Connected to
Connected to
Test Fixture
Test Fixture
YES
YES
YES
YES
NO
NO
YES
NO
C
Heater
YES
Test runs normally at a temperature between 49
and 51
C. Temperature is recorded.
YES
Both tests run normally at temperature:
First test between 49
Second test between 59
Temperatures are recorded.
YES
Test runs normally but with no heating. Device
temperature is recorded.
NO
Test runs normally but with no heating. Device
temperature is recorded.
NO
Test runs normally but with no heating. No
temperature (NaN
NO
Test aborts with the error message, "Failed to read
temperature. Is a thermocouple connected?"
NO
Test aborts with the error message, "The heater did
not respond. Is the heater connected?"
YES
Test aborts with the error message, "Failed to read
temperature. Is a thermocouple connected?"
Using the Device Heater
Expected Result
C and 51
C.
C and 61
C.
1
) is recorded.
C
63
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