Post by Lake Shore Jeff M on Jul 3, 2018 11:39:33 GMT -5
Based on this test, you will need to return the Gaussmeter and probe so we can determine which is bad. Most likely it is the probe, however, the only way to know for sure is to purchase a new probe or return both so we can perform an analysis.
Please contact email@example.com with your information so we can issue a RMA.
Post by Lake Shore Jeff M on Jul 3, 2018 7:12:40 GMT -5
The issue you are reporting can be due to a defective probe or an internal issue in the Model 450 Gaussmeter.
The first thing I suggest you do is measure the resistance between pins 1 & 9 and pins 8 & 15 on the probe connector. You should see a reading of approximately 2.7 Ohms and if you see more than 4 ohms, the probe is defective and you will need to order a new probe.
If you see the correct reading, then the probe and Model 450 will need to be returned to the factory for analysis. If this is the case, please contact firstname.lastname@example.org and provide them with your contact information as well as the model and serial number of the probe and the serial number of the Model 450.
Post by Lake Shore Jeff M on Jun 28, 2018 8:45:40 GMT -5
Basically, the suggested two sensor approach is recommending to add a second sensor near the sample space so you have a more accurate measurement temperature.
The only way you can use two sensors to control the same heater is to set up zone control where you use one sensor for part of the setpoint ramp and then switch to a second heater once your setpoint reaches the desired temperature. In the zone segments, you can have different heater ranges and PID values
Post by Lake Shore Jeff M on Jun 19, 2018 8:10:17 GMT -5
Yes, version 2.2 of the Ethernet Firmware increased the number of open sockets from one to five.
To verify the current version installed on your 336, you can connect to the 336 using your browser by entering the IP address assigned to the instrument which will open the on board web page that displays the current firmware version. You can also find the firmware information from the front panel by pressing and holding the Escape Key until the Product Information screen appears.Press enter and the firmware versions will be displayed.
If you do not know the IP address, you can press the Interface button on the front panel and use the arrow key to highlight the view IP Configuration then press enter. The IP address is displayed on this screen.
The Ethernet Firmware is updated via the on board web page, however, you may encounter an issue depending on the JAVA version you have on your computer. If you want to give it a try, you can first download the latest version of the Ethernet Firmware (Version 2.6) at:
Once you download the file, open the embedded web page and select Utilities and then the Launch Ethernet firmware updater and follow the instructions to perform the update. If you find that the updater will not open, it may be due to JAVA security blocking the application due to an expired certificate. If this occurs, please send an email to email@example.com so we can send more detailed instructions.
Post by Lake Shore Jeff M on Jun 15, 2018 8:39:16 GMT -5
The Lake Shore Curve Handler version 9 application has many dependencies and requires that the GPIB Driver is properly configured to work with NET Framework 4.0 & 4.5.1.C. Regretfully, it is sometimes impossible to get the GPIB Interface operational with the application so I suggest you download and install the Legacy version of the Curve Handler application that can be found at:
Post by Lake Shore Jeff M on Jun 6, 2018 12:00:00 GMT -5
I apologize for the delayed response as we did not receive a notification when you posted this question.
First, it is not possible to bend a metal stem probe as the wiring inside the stem is encased in epoxy and does not include any slack, therefore, if you attempt to bend the probe, most likely, the wiring will break.
Designing a probe that is not a standard length we offer or possibly making one with a 90 degree bend would be considered a custom probe and you would need to contact one of our sales representatives to start that process. The extra cost and delivery time would depend on the final design so I cannot give you an estimate at this time.
Post by Lake Shore Jeff M on May 22, 2018 10:07:22 GMT -5
The information you are requesting regarding how Lake Shore implements our PID Control Algorithm is considered to be proprietary and not available to the public. If you wish to pursue this request, you will need to contact your Lake Shore Sales Representative so that they can work with you to establish a legal Non Disclosure agreement before we will provide the requested information
Post by Lake Shore Jeff M on May 15, 2018 9:03:33 GMT -5
Hello M. Romero,
We have not tested wiring more than one sensor to a single current source, however, we do believe it should work. To do the actual wiring, the current leads for the three sensors will need to be wired in series instead of parallel as you indicated. This will ensure that 100mA flows through each sensor where in parallel, the current would be divided between the three sensors.
Let me know if you need additional information regarding the wiring connections.
Post by Lake Shore Jeff M on May 15, 2018 7:48:00 GMT -5
The Heater 1 Open error is saying that the Model 335 has detected that the resistance of the heater exceeds approximately 500 ohms. When you start the heater, do you see the temperature of the control sensor start to increase and then the error appears? If yes, what may be happening is that as the system starts to warm up, one of the wires going to the heater is going open which causes the error. If you do not see the temperature start to go up before seeing the error it may indicate an issue in the Model 335 heater circuit.
The first thing to do is to disconnect the heater from the rear of the Model 335 and measure the resistance across the prongs of the dual banana plug looking back at the heater. If it reads greater than 500 ohms, you will need to investigate that circuit. If it reads normal values which are normally around 25 to 50 ohms, reconnect it and try to do an experiment. Monitor the temperature and see if the open error appears at he same temperature each time. If it does, then the open is due to an issue in the system you are using and you will need to contact that manufacturer for troubleshooting procedures. If not, let me know the details of the failure and we can do additional Model 335 troubleshooting.
Post by Lake Shore Jeff M on May 8, 2018 9:44:20 GMT -5
You are correct that providing a quote is difficult and should be provided by our sales representative. I suggest you contact our sales department at firstname.lastname@example.org and one of our technical sales representatives will work with you to determine which one of our probe station models meet your testing requirements.
Post by Lake Shore Jeff M on May 8, 2018 9:21:40 GMT -5
At this time, Lake Shore does not support the Model 335 Controller on the Keithley B4200 SCS System. Although you are using the Model 336 Drivers, there are enough differences that you may encounter other issues. At this time, we have no plans to offer Model 335 drivers for the B4200 system.
The reason you have the No Output message showing is that you are displaying information for channel A and you have not associated Output 2 with channel A. In order to see Output information using the Channel A display mode, you need to assign Channel A to Output 2 since you have channel B assigned to Output 1.
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