|
|
Post by mneveu on Oct 31, 2022 9:51:02 GMT -5
Hi, I broke the V- and I- (clear and green) leads off a DT-670 sensor; see picture below. Is it possible to solder them back on without sending the sensor back to LakeShore? If so, what procedure would you recommend? Thank you for your help!  |
|
|
|
Post by Lake Shore Jeff M on Oct 31, 2022 10:27:05 GMT -5
|
|
|
|
Post by mneveu on Oct 31, 2022 11:35:12 GMT -5
Thank you Jeff. Here are clearer pictures. It looks like the (-) lead snapped in half, but the part welded to the sensor is still there. Can the two halves of the lead be soldered following Lead Attachment steps #4-6 of the instructions linked in your previous post? Best, Marc  |
|
|
|
Post by Lake Shore Jeff M on Oct 31, 2022 11:52:13 GMT -5
It looks like the Kovar lead is what broke and I don't think there is enough of the lead remaining to make a connection. You can see some of that lead under the heat shrink of the solder sleeve that was used to attach the lead extensions.
You could try to solder a 36 Gauge copper wire to the pad next to the existing lead that was welded using a 60/40 Sn/Pb solder. You could then attach the Phosphor-Bronze leads to that wire, however, it will limit the sensor to a high temperature just above 400K as the solder will melt at that point.
I could not guarantee that we could complete the repair without having the sensor returned.
|
|
|
|
Post by mneveu on Nov 3, 2022 15:01:11 GMT -5
Hi Jeff, We followed your advice and soldered the phosphor bronze leads onto the pad. The sensor works well. Thank you for your help! Marc  |
|
|
|
Post by mneveu on Nov 7, 2022 15:31:38 GMT -5
Unfortunately, after 4 hours in vacuum as the experiment proceeded, the sensor started giving erratic and increasing values up to 400 K despite being at 293 K. It looks like I will order a new one. Thanks for your help anyway, Jeff.
|
|
