There are several configuration settings that need to be entered to tell the monitor you are using a Platinum Sensor connected to a specific input and how you want the information displayed. Finally, you will need to connect the sensor using a 4-wire connection method.
Our service department will be more than happy to talk you through the setup if you give us a call at 614-891-2243 and select option 2 for service.
Post by Lake Shore Jeff M on Jan 3, 2018 8:21:57 GMT -5
Yes, over the years customers have written their applications in everything from Quick Basic to C++ programming languages. However, since writing your own application may require the purchase of additional programming software and possible consulting fees, you may be better off looking at upgrading your Model 330 to one of our current models like the Model 335, which will allow you use our free Chart Recorder application to record the time versus temperature of the inputs in real time.
Post by Lake Shore Jeff M on Jan 2, 2018 8:17:03 GMT -5
Lake Shore does not offer any software programs that allow you to capture the time and temperature data for sensors connected to the obsolete Model 330 temperature Controller.
Chapter 4 of the Model 330 User Manual describes the RS232 and IEEE488 Interfaces and provides a list of commands that can be used with the instrument. If you are familiar with programming, you can use any programming language that allows you to send the ASCII commands to the interface and then read the response. If you have any specific questions regarding the commands available in the Model 330, please let me know.
Post by Lake Shore Jeff M on Nov 27, 2017 8:17:38 GMT -5
In the Model 325, the correct sensor type selection for a Cernox Sensor is NTC-RTD. Since you cannot see your curve when you use that selection, I expect that you did not create the curve in the correct format. Curves for NTC-RTD sensors must be in the Log Ohms versus Temperature in Kelvin format. If you entered the curve in resistance versus temperature format, the instrument will not allow you to select the curve. To resolve the issue, make sure to select the Log Ohms versus Temperature format in Curve Handler and then convert your resistance values to Log Ohms Base 10. Once you have the conversion, enter the curve points starting at the highest temperature to the lowest.
Post by Lake Shore Jeff M on Oct 27, 2017 6:14:07 GMT -5
Have you tried to uninstall and reinstall the MeasureLINK Application? Communicating with the Model 240 using Tera Term confirms that the USB Port is operating correctly so the issue seems to be between the MeasureLINK application and the Model 240. Also, please confirm what COM Port you have assigned as I see two different ports in the screen shots you have provided.
Post by Lake Shore Jeff M on Oct 23, 2017 11:52:30 GMT -5
Thank you for sending the screen shot showing the error. I will assume that clicking on the connect button will not reconnect MeasureLINK to the Model 240. If that is the case, I would like for you to try connecting to the Model 240 using an external Terminal Emulation program like Hyper Terminal or Tera Term. If you can send an email to email@example.com, I can send you the configuration information for Tera Term or Hyper Term if you can use either of these programs.
Post by Lake Shore Jeff M on Oct 16, 2017 14:46:58 GMT -5
Although the current source you have selected sounds like it can work, there are many other considerations that need to be taken into account. Exciting the sensor with a 10uA current source will produce voltage across the sensor that is dependent on the temperature the sensor is measuring. You will need to design a voltage measurement circuit that can feed the measured voltage into a processor which can perform a calculation to determine what temperature the sensor is measuring. This calculation is done by doing a straight line interpolation between the two sensor calibration curve breakpoints that are directly above and below the measured voltage. You would then need to have the ability to write that information to a display.
Other than trying to design a circuit, I suggest you consider purchasing one of the Lake Shore Temperature Monitors such as the Model 211 which can do everything you are trying to design.
Post by Lake Shore Jeff M on Sept 27, 2017 11:37:47 GMT -5
When using a current source and voltmeter to test a diode sensor, set the current to 10uA and depending on which model of diode sensor you have, the resulting room temperature voltage should be between 0.36V up to 0.56V, however, if the cryostat you have is equipped with a magnet, the sensor may be a GaAlA, gallium aluminum arsenide diode, which does produce a voltage of approximately 0.89V at room temperature.
Post by Lake Shore Jeff M on Sept 5, 2017 7:19:57 GMT -5
The message is indicating that the CAT28F020 64K Flash Memory device in location U39 has failed and most likely will need to be replaced. This is the memory location where user entered curves are stored.
Please contact Lake Shore Service at firstname.lastname@example.org and provide the serial number of your Model 340 so we can verify the part you will need to order.
Post by Lake Shore Jeff M on Aug 29, 2017 6:19:32 GMT -5
LinkPhysics Corporation, our representative for Chine reported this issue to our service department yesterday. As I informed them, there are no settings that can be used to adjust the probe and based on the fact that the old probe and the Model 425 Gaussmeter reads the field correctly, I recommended that the Hall Probe be returned for a Warranty Failure Inspection. As long as the probe has not been damaged, we will repair and recalibrate or replace the probe and return it to you under warranty.
As defined in our warranty policy, you are responsible for the shipment to Lake Shore. As discussed above, providing no damage is found, we will repair, recalibrate and/or replace the probe at no additional cost to you.
Please continue to work with LinkPhysics to arrange the return for inspection.
Post by Lake Shore Jeff M on Aug 17, 2017 12:59:15 GMT -5
We have reviewed the Model 336 driver for the Keithley Model 4200- SCS and have determined that due to several reasons in the design, the driver cannot be used with the Lake Shore Model 335 Temperature Controller.