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Hereby this contact, I really need the support to clarify any doubt that I have evolving the module 7700 - DAQ6510 using the function of 4-wire measurement.
Throughout many manuals, videos on youtube as well as datasheet I looked for this info in detail but I am still on doubt and I am avoiding to make any connection.
The structure of the test I need to do with my product correlate Temperature and Resistance. I already connect all Thermocouple (6 points) and to conclude I also need to connect the resistance (4 points).
Note: Resistors will be in 4-wire using channel 1-11(paired), 2-12( (paired) , 3-13( (paired) and 4-14( (paired) . Thermocouples will use channel 5, 6, 7, 8, 9, 10.
I share the schematic pattern that I used to connect the resistors and one photo of mine 7700 module with all connections that I made on my understanding of the pattern.
Doubt 1) Do I really need to connect wires between channel 1 and 11 or the system pairs it automatically when I select 4-wire function? You can see from the photo that I made it with red wires.
Doubt 2) Do I need to connect any other channel of the 7700 module with these set of channels that I used for resistance? If yes, can you send me any pattern or photo detailing each wire?
Doubt 3) DO you have any other pattern (or a real photo) of a 7700 module configured to work with 4-wire measurement? If no, can you develop a pattern using channels 1, 2, 3, 4 in a 4-wire function using the file attached?
Doubt 4) Using Module 7700 am I correct to think that I will connect only 2 wires between the resistor and all of the connection that characterize the 4-wire method will be internally in the 7700 module?
Any help related to my doubts will be a good advance on my tests.
- Keithley Applications
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- Joined: October 15th, 2010, 10:35 am
- Country: United States
This is not giving you lead wire error elimination benefit of 4-wire ohms.
For a four wire ohms channel on the 7700, you should run wires from both of the MUX card channels to the DUT. Bring four wires out:
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