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Post by Lake Shore Jeff M on Apr 25, 2023 15:07:42 GMT -5
The email you sent was assigned to our Janis support engineer so you should hear from him soon.
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Post by Lake Shore Jeff M on Apr 25, 2023 7:09:35 GMT -5
The Model 336 can be configured to use the Ethernet Interface were you would assign an IP Address that the PLC device can connect to using a TCP/IP Socket connection. The Model 336 can support up to 5 simultaneous socket connections.
Once you have a connection established, you would need an application on the PLC that could send and receive commands and their respective responses.
For a complete description of the Model 336 Ethernet Interface, please review the information in chapter 6 of the user manual.
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Post by Lake Shore Jeff M on Apr 19, 2023 14:21:11 GMT -5
The heater is a wire wound heater so we can provide the instructions and a kit of parts if you have the ability to perform the work yourself. Do you want me to send you the information? If yes, please send me an email to support@lakeshore.com so I can respond with the information and instructions you would need.
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Post by Lake Shore Jeff M on Apr 19, 2023 13:17:43 GMT -5
Please provide additional information regarding what this device is. Is it from a system you have purchased from Lake Shore or Janis Research? If yes, please provide the model and serial number of the system so we can research the information.
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Post by Lake Shore Jeff M on Apr 12, 2023 9:22:28 GMT -5
I am not familiar with the TI module you mention so I cannot answer that question.
We do not have an application note regarding using our sensors with microcontrollers and as I mentioned before, the sensor requires a 10µA excitation current in order for it to work so you may not have a choice other than a daughter card. Since the RTD sensor also requires an excitation current that you need to source the diode would ne no different other that the 10µA versus 1mA requirement for operation.
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Post by Lake Shore Jeff M on Apr 6, 2023 9:22:53 GMT -5
In order for the diode to work, it requires a constant 10µA excitation current be applied on the I+ & I- leads in order to read the voltage on the V+ & V- leads.
1. If you have a Lake Shore controller, the current source and voltage measurement circuits are built into the controller, otherwise, you would need to provide the 10µA current from a different device. We offer a Model 121 Current source that would work, The Inputs on any Lake Shore controllers use the 4-wire connection for the sensor.
2. The maximum length between the controller and sensor is not a fixed distance as many factors determine how far away it can be. I suggest you read the application note that was written for our Model 240 Module which offers information on the best practice for long cable lengths. www.lakeshore.com/docs/default-source/default-document-library/model240note2016.pdf?sfvrsn=8cf63d0c_3
3. We no longer offer transmitter cards, so the only option would be to use a controller or monitor that can offer RS232 interface where you can set up an application to query the temperature. We also offer an ethernet interface on our Model 224-12 Monitor or the Model 336 Temperature controller.
If you wish to discuss this in more detail, you can contact us at 614-891-2243 and select Option 2 for support or bu sending an email to support@lakeshore.com.
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Post by Lake Shore Jeff M on Mar 17, 2023 6:23:03 GMT -5
The CRVHDR? command requires that you include the curve number you want to read. In the case of the User Curve, the correct command is CRVHDR? 21. Sending the CRVHDR? command without the curve number will result in the response you are seeing.
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Post by Lake Shore Jeff M on Mar 15, 2023 9:22:16 GMT -5
This was answered in another post on March 15
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Post by Lake Shore Jeff M on Mar 15, 2023 9:10:41 GMT -5
Simon,
From what I can find on the manufactures web site, the sensors you have at basically a Class A PT-100 sensor so on the Model 331, you would configure the input as a PT-100 and use the PT-100 standard curve.
To connect the sensor to the 331, you need to use a 4-wire connection where the I+ & V+ leads connect to one side of the sensor and the I- & V- leads connect to the other side. This relates to pins 1& 2 and pins 4 & 5 on the 6-pin input connector on the Model 331 controller.
Since these are described as Class A sensors, I do not have any information on the accuracy to the standard IEC751 curve so you will need to ask the manufacture on what to expect.
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Post by Lake Shore Jeff M on Feb 22, 2023 15:39:14 GMT -5
According to the firmware, pressing the Escape or any front panel key should clear the error. Can you confirm what Firmware version you are running? To see the version, press and hold the Escape key in until the Product Information screen appears and press enter.
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Post by Lake Shore Jeff M on Feb 10, 2023 14:49:22 GMT -5
You can display the heater diagnostic information for Outputs 1 & 2 on a Model 336 Controller by holding the Display Format Button in for approximately 5 seconds When the controller beeps, release the keys and you will see the real time information for both outputs.
At this time, none of the diagnostic information is available thorough the command interface.
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Post by Lake Shore Jeff M on Feb 9, 2023 14:03:33 GMT -5
The only time I have experienced this is if the rack is not grounded which means the DIN Rail is not grounded or the cable shield wire was grounded at both ends. Make sure that the Ground connector is present on the 240 which is a silver clip on the DIN Rail mounting location opposite of the spring loaded clip.
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Post by Lake Shore Jeff M on Feb 8, 2023 10:13:16 GMT -5
The Model 240 acquires its ground through the DIN Rail connection. The ground connection on the Input is for the shield of the cable and should not be connected to the cabinet grounding bar as that will create a ground loop.
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Post by Lake Shore Jeff M on Feb 8, 2023 10:12:55 GMT -5
The Model 240 acquires its ground through the DIN Rail connection. The ground connection on the Input is for the shield of the cable and should not be connected to the cabinet grounding bar as that will create a ground loop.
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Post by Lake Shore Jeff M on Jan 11, 2023 7:43:06 GMT -5
The Model 335 does not have the ability to automatically provide the information you are seeking. The only thing you can do is to manually measure the resistance across the prongs of the dual banana plug that is connected to the Output to know the room temperature resistance. You can then manually measure the voltage across the dual banana plug and calculate the current using the resistance and voltage values. The one thing that is not accounted for in this method is the resistance of the heater will change some as it heats up.
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