Archive for category Service

What’s the Backdoor Password for Honeywell X-Series Paperless Recorders?

Honeywell Minitrend QX X-Series Paperless RecorderOne of the strengths of Honeywell’s X-series paperless recorders is password security. You can configure it to keep operators from making configuration changes, and it’s a necessary part of being able to view a recorder’s data using a web browser.

One of the weaknesses of Honeywell’s X-series paperless recorders is password security. And by that, I don’t mean it’s bad. I just mean it can cause problems if a user fails to enter their username and password right, and ends up locked out of the recorder.

So I’m guessing if you searched for the backdoor password, you’re in that situation. You’re locked out of your recorder and can’t figure out how to get back in.

First, I apologize for luring you into reading this. There is NO backdoor password for an X-series recorder.  But don’t give up hope: There is an answer.

(What’s a back door? Watch and learn.)

Hopefully, there’s a user at your location with administrator level access, who can reset a locked-out user. But if that’s not the case, what do you do when everyone is locked out of an X-series recorder?

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Why is my clamp-on flowmeter’s flow rate stuck at zero?

Siemens ultrasonic clamp-on flowmeter sensors mounted to a pipeI was working with a customer to replace a Siemens clamp-on ultrasonic flowmeter after its electronics had been replaced.  We followed all the connection and startup instructions, but the flow rate was stuck at 0.00 – no dithering, no hunting, not a single flicker in the low-order digits.

Very strange.

Ultrasonic clamp-on flowmeters can be very sensitive to low flows. But even at no flow with the pump turned off or the line isolated, the digits to the right of the decimal point would dither around zero, showing some very small positive values, some very small negative values.  It’s the nature of the beast.

So why were we getting an absolute zero reading? What was going on?

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Digital Communications Toolkit

We’ve gotten feedback from several people who have asked what I carry around to deal with serial or Ethernet communications issues.  So I dumped out my comm tool bag and here’s the list of all the stuff.

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Tested and proven: Honeywell PIE software reads and writes do not affect a UDC controller’s output

A customer has several UDC 3200 loop controllers with newly added Ethernet cards.   He needed to configure each of the controllers’ IP addresses using Honeywell Process Instrument Explorer (PIE) software.  Because the controllers are working in a 24×7 continuous process, he was concerned about how making those changes would affect each controller’s performance.

So he asked me:  Would a PIE action of uploading config files from or downloading them back to a controller affect the controller’s performance?

In the past, I’d only ever changed a controller’s IP address when it was on my workbench, not when it was actively controlling a process. So I’d never paid attention to whether PIE communications would affect the controller’s output or its PID action. Since I couldn’t answer the question, I told the customer I’d run a test to find out for sure.

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