jmkim
New Member
Posts: 1 
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Post by jmkim on Dec 26, 2017 23:33:47 GMT -5
I have 2 questions.
1. In error table, what means minus sign? [(dT/T)=(T_read - T_real)/T_real] is it right?
2. Which direction is parallel to field and sensor. I am typically using SD type and CU type.
Parallel means parallel to the broad surface of the sensor, so, parallel to plain of lead wire.
Anyone help me, please.
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Post by Lake Shore Ryan on Dec 28, 2017 0:02:20 GMT -5
Hi,
I am assuming that you are referring to magnetic field offsets in silicon diode sensors?
The error table contains negative numbers because these sensors act as Hall Effect devices when a magnetic field is applied. The sensor voltage increases, resulting in a reduced equivalent temperature since the sensor is a negative temperature coefficient device. At low temperatures and high magnetic fields, the voltage increases so much that it exceeds the maximum standard voltage that the diode would normally produce.
Parallel in the case of the SD package means that the field is in the same plane as the leads. Perpendicular means it is at a right-angle to the leads, running from the mounting base of the sensor, through the face.
For the CU bobbin, this becomes more difficult to explain because the SD package is embedded inside the CU bobbin. Let me know if you really need to know the orientation of the sensor element inside the CU bobbin.
Hope this helps. |
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Post by storiesdown on Sept 13, 2023 21:45:48 GMT -5
Error tables or error correction tables are typically provided in the datasheets or technical documentation of temperature sensors. Start by looking at the table's header to understand the parameters and conditions being described. The header should include column titles that specify the relevant variables.
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