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Post by matteo on Mar 15, 2018 10:17:14 GMT -5
Hi All, we are working with a 331 Temperature controller for long time, and it has always worked well. Now is happened that the pins contact inside of the thermocouple detached (as shown in the attachment). I am asking if you could give me the scheme of the connection in order to weld it again. Thank you! M  free photo hostingAttachments:
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Post by Lake Shore Jeff M on Mar 15, 2018 12:05:41 GMT -5
Hello Matteo,
The picture you provided does not have enough information to allow me to tell you how to reconnect the broken wires to the connector. IS the connector end shown in the picture, the end that plugs into the Model 331 or does it connect to the system containing the sensor? At this time, all I can provide is the pin out for the Input connector on the Model 331. If you can find out what the designation of the broken leads are, you can use the following to determine how to make the connections:
Pin 1, I-, negative Current Pin 2, V-, Negative Voltage Pin 3, Shield Pin 4, V+, Positive Voltage Pin 5, I+, Positive Current. Pin 6, Shield
What you need to determine is what do the broken leads connect to in your system
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Post by matteo on Mar 20, 2018 5:55:01 GMT -5
Hello Jeff, Sorry for the delay. The connector shown in the picture connect to the system containing the sensor (thermocouple). I hope this new pictures will be more exhaustive. The problem is that I can't determine the designation of the broken leads because we can not open the end of the connector that plugs into the 331 Model. If you can provide me a color code or a scheme (like red,-I; white,+V..ecc) Thanks to the availability!   image upload |
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Post by Lake Shore Jeff M on Mar 20, 2018 6:56:18 GMT -5
Matteo,
Were closer, however, looking at the pictures you provided, it looks like the broken cable connects to a cable that was provided by Lake Shore which has the 6-pin connectors that connect to the Model 331 on one end and is provided with bare wires on the other end. I see that someone has added connectors to the bare wire end so all I can provide is information on the color code pin out of the 6-pin connector that attaches to the Model 331 input connector. The Pin Out can be found in Figure 7-1 in the Model 331 User Manual. You will need to determine what pins in the connector that was added is connected to the pins of the 6-pin connector. Then using the pin out I provided in my previous post, you can determine what pins the attaching cable should be connected to.
If you are correct and the broken cable attaches a Thermocouple wire to the Model 331, I assume you had those wires connected to the V+ & V- pins, however, that is not an approved Thermocouple sensor connection.
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Post by matteo on Mar 21, 2018 6:39:20 GMT -5
Thank you Jeff,
I forgot to tell you that our 331 model is the one provided by Bruker company for Atomic Force Microscopy. Probably the the connector added is specific for the Bruker model. I will follow your advice for pins determination.
Matteo
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Post by Lake Shore Jeff M on Mar 21, 2018 6:48:42 GMT -5
Another option would be to contact Bruker and ask them for the wiring connections.
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Post by matteo on Oct 26, 2022 3:20:55 GMT -5
Dear Jeff,
After four years our thermocouple got broken again. This time the rupture happens at the very end, close to the sensor. It would be possible to buy the thermocouple? We are working with a temperature controller model 331.
Kind Regards
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Post by Lake Shore Jeff M on Oct 26, 2022 6:14:57 GMT -5
Matteo,
I do not know what sensor is in your system so I cannot make a recommendation. Can you tell me how the Input of the Model 331 is configured. I would need to know the Sensor type and what curve you have selected to begin helping you.
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Post by matteo on Oct 27, 2022 3:58:19 GMT -5
Sorry I thought that the previous messages were still present. The broken pieces is the thermocouple from model 331 configured by Bruker to work with Atomic Force Microscopy perfusion stage incubator. You can find two images of the sensor. I hope it helps, because i don't know which model is our sensor is.
Thank you
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Post by Lake Shore Jeff M on Oct 28, 2022 6:44:13 GMT -5
The pictures you attached do not help as it only shows wires and i do not know anything about the Bruker System.
Once again you need to ask Bruker what sensor is installed and what connector on the system is it connected to with the specific pin assignments.
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