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.
Post by Lake Shore Jeff M on Mar 16, 2018 7:32:42 GMT -5
Assuming you are referring to a Cernox sensor mounted in an SD package, Providing you prepared the surface and applied the Varnish as described in our Installation Instructions (www.lakeshore.com/Documents/F017-00-00.pdf) it is most likely an issue with the expiration date of the varnish.
Although Apiezon grease may work, it is better suited when the sensor is mounted in a recess or hole.
I believe the most reliable way would be to use our "CO" spring clamp with a thin layer of Apiezon N grease between the sensor and sample. The concern with an alligator clip would be the tension of the clip could possibly crush the sensor.
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
Post by Lake Shore Jeff M on Mar 8, 2018 7:08:35 GMT -5
The easiest way to determine if the cable is a Straight or Null Modem cable is to see how pins 2 & 3 are wired. A straight serial cable wires pin 2 to pin 2 and 3 to 3 where a Null Modem cable wires pins 2 to 3 and 3 to 2. If the 9-pin connector of the adapter is a Male connector, you will need the Null Modem cable.
Post by Lake Shore Jeff M on Feb 27, 2018 7:52:06 GMT -5
The "SD" package is our most rugged package and is hermetically sealed allowing immersion into liquid cryogen like LN2. When properly mounted , the sensor will accurately report the temperature of the bulk superconductor . Sensor mounting suggestions can be found in the Cernox™ Installation Instructions at:
Post by Lake Shore Jeff M on Feb 27, 2018 7:38:25 GMT -5
The 32AWG Quad Twist Phosphor Bronze wire is suitable to be soldered to the connector you are using. The soldering technique will be similar to attaching the leads to the sensor which is described in our Cernox™ Sensor Installation Instructions at:
Post by Lake Shore Jeff M on Feb 22, 2018 7:51:15 GMT -5
Lake Shore does not offer a multi channel Temperature Monitor that has more than the two Analog Outputs as found on the Model 218 Monitor.
Have you considered using our free Chart Recorder Software Application? This application can log temperature data for all 8 channels of the Model 218 and write the data into a Microsoft Excel file. You can find additional information and/or install the Chart Recorder application from the following link"
Post by Lake Shore Jeff M on Feb 12, 2018 12:11:10 GMT -5
I think I understand what you are saying, however, to make sure I understand correctly here are my assumptions:
It sounds like you are getting back four bytes from each sensor reading. I’m assuming that the PIB is a single byte. The Siemens software needs to be setup to accept that in as a single, four-byte value that is then interoperated as a floating point value. That should start to give you good floating point readings.
Next, you should use MeasureLINK to setup what data you are sending back to the PLC and this is where you can choose to send the temperature reading (K or C) instead of a sensor reading (ohms). I think your biggest issue is bringing those four bytes in as one word and converting it to a floating point number.
Post by Lake Shore Jeff M on Feb 5, 2018 8:28:08 GMT -5
Regretfully, it sounds like your Model 240-2P has a defective USB Interface device on the circuit board and will need to be repaired or replaced. Please send the following information to email@example.com:
Your full given name
Name of the company or educational institute you represent
Address of the above including:
State or region
Country of not the US
Your contact telephone number
Once we receive your information, we will determine the warranty status and let you know how we will proceed with the resolution.
Post by Lake Shore Jeff M on Jan 30, 2018 10:04:30 GMT -5
I am not familiar with the capabilities of the raspberry pi, however, to control a Model 370 requires that it be able to send and receive commands and responses over one of the two communications interfaces provided on the instrument. The Model 370 is equipped with one RS232 Serial Communications Port and one IEEE-488 GPIB port. The raspberry pi would need to be able to support either of the physical interfaces and have the ability to send and receive ASCII characters via those ports. In addition if you want to run any of the software supplied by Lake Shore and/or National Instruments Labview, you would need to be able to emulate a windows operating system.
You can review Chapter 6 in the Model 370 User Manual for specifications regarding the two interfaces and the specific commands that can be used with the instrument.
Post by Lake Shore Jeff M on Jan 28, 2018 20:58:20 GMT -5
The FIELD? command returns the value of the channel that was last specified by the CHNL command. There are a few commands that report the results of the channel that is specified using the CHNL command. The FIELDM? command is one of those. When you send the ALLF? command, you would need to send CHNL X; FIELDM? to see what multiplier is used with channel X. Repeat the CHNL & FIELDM? command with Y, Z & V to get the Y, Z and Vector channel. Other commands that are channel specific are the RANGE and UNIT commands.
Post by Lake Shore Jeff M on Jan 25, 2018 11:06:37 GMT -5
The CAT 7 cable should work very well for the application you have described.
In regards to which shields to connect, we suggest that you at a minimum connect the outer shield to either of the input connectors. In addition, if you want to also connect the individual pair shields, you can do that to each input. On the 6-pin input mating connector both pins 3 & 6 connect to the Model 336 ground plane so that should allow sufficient terminations for those connections, however, you will need to double up at least one of the terminations on either pin 3 or 6.