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
Post by Lake Shore Jeff M on Mar 15, 2018 12:05:41 GMT -5
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
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!
Post by Lake Shore Jeff M on Mar 20, 2018 6:56:18 GMT -5
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.
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