lesmanbethr

Marketing manager for Lesman Instrument Company and moderator for Dan's Tips, a blog by Dan Weise, Lesman product and technology specialist.

Homepage: http://lesmanbethr.wordpress.com

How does adding a 250-ohm resistor make HART work?

Sometimes there’s a problem getting a loop powered HART instrument to communicate when it’s on the benchtop, but it communicated fine when wired in the field.   Why is that? Read the rest of this entry »

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How many credits do I need for my Honeywell paperless recorder?

When I talk to customers about Honeywell X-Series paperless recorders, this is their first question. The quick answer is: It depends on what tasks the recorder needs to be able to do.

But before I get into that, let’s look at what this credit system thing does and why Honeywell switched to it on the X-Series.

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Are thermocouple heads and transmitters interchangeable between brands?

Ever wonder if you can mix brands of thermocouple heads, transmitters, or junction blocks?  The other day, I was trying to figure out if I could, and I ran into a spec I didn’t understand – DIN Form B. So, what exactly is DIN Form B, and how does it relate to thermocouple heads, transmitters and junction blocks?

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Save your custom configuration! Avoid the headaches!

Do you need to send an instrument to the factory for repair or service? Before you disconnect it, pack it up, and ship it out, be sure you do the following:

  1. Make a backup or copy of your instrument configuration, so you can quickly reinstate the settings.
  2. Make sure you have a written record of your settings on file. Several manufacturers include a configuration worksheet in the instrument user manual. If it’s not there, you can write them on a copy of the quick-start or setup installation guide.

Why is this critical?

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