Vibration Probe and Cable Ohm Check, Bently Nevada 

Welcome!

Glad you liked it. Thanks for the compliment.

The easiest way is to figure out how much resistance per meter should be offered by each conductor. This information will be available in the manual. For the 3300 the core should produce .22/meter and the jacket .0667/meter. The problem is, most basic meters will round up to a tenth ohm. When you build your pass fail condition you have to account for that. I have a video of how to build this spread sheet, I could upload it if you want.

Thank you for the feedback. I will.

@@jimdiggins101 hi! can you upload this one? thanks!

Yes. Use Scotch70. You can also install a boot. Here is a RU-vid video on installing a boot ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-0qTd8aeoOGY.html.

The negative voltage is used by Bently Nevada because of the design of their proximitor. During the initial design, the cost of one transistor over the other was a consideration and they went with negative bias voltage due to the availability of PNP transistors. That is the answer I got years ago when I asked the same question.

I am not sure what you are asking. Can you provide some context?

I uploaded a video on my channel showing how to make a an excel form. I can also email you a similar form to the one in this video.

@@jimdiggins101 hi..can u give to me he table format.. tqsm... abdulrahmansofian8@gmail.com

@@jimdiggins101 Can you email to me, similar form to this video?

​@@jimdiggins101 Hi Jim. How are you?. Can you email to me, with the excel form?

Sorry but I dont distribute this spreadsheet. I will upload a video showing how to build one when I get time.

Build it in excel. I show all the necessary formulas in one of my videos.

Thank you Sr. I'll do it

I am working on a series of videos that explain how to quickly make your own spreadsheets. A skill that will come in handy for many other test procedures.

The only way to get an accurate measurement of resistance this low, is to use an instrument with a 4-way bridge. Since most basic multi-meters are two wire measurements and round up to the tenth ohm, the accuracy isn't sufficient for this type of measurement. Even when you use the delta button on your meter to eliminate the test lead resistance, a .1 ohm resistance float can exist since the resistance value is changing constantly. To avoid false failure indications, I open the tolerance a little bit. This problem is less of an issue if you stick to measuring the entire circuit resistance (core, jacket, & probe). If you have a precision ohm meter, this will not be a problem.

@@jimdiggins101 Thanks for the answer. Where can I download your test tables?

I do not have tables available for download. I can make a video showing how to create a table if you like.

@@jimdiggins101 it will be great.Thank you