Archive for category Troubleshooting

Disabling a Channel on a Honeywell Trendview Paperless Recorder

Written by: Dan Weise

Over time, changes in your process needs occur, and a sensor that you’ve connected to a Trendview paperless recorder channel may be taken out of service. When this happens, I suggest that both the analog input and the pen be disabled. Here’s why:

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Changing the Clock Battery on a Honeywell Paperless Recorder

Written by: Dan Weise

The installed base of Honeywell Trendview X series paperless recorders is approaching an in-service period of a decade (introduced mid-2006). Given that kind of service time, you need to be aware of the issues involved in changing the clock battery.

The replaceable clock battery serves as a backup for the on board real-time clock chip as well as the internal battery-backed static RAM. If your paperless recorder is getting old, the battery may ready for a swap-out. If so, you may need a one-day-use access code that only Honeywell can provide, so plan ahead. You don’t want to get locked out of your recorder!

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The 15-30-15 Rule in Ultrasonic Level Measurements

Written by: Dan Weise

If I’ve heard it once, I’ve heard it a dozen times when talking with a Siemens support guy while evaluating a problematic ultrasonic level measurement application,
“What’s the echo confidence and strength?” “What’s the noise measurement?”

Those are numbers that quantify the echo quality: the floor values for echo confidence and strength and the ceiling value for the noise.   I’d look up the value and the guy on the phone would tell me whether the number was good, bad or so-so.  Finally, someone wrote down what those values should be, and they’re worth filing for future reference.

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Video: Troubleshooting a Maxon Shutoff Valve

We understand the inconvenience that comes with having to send an instrument out for repair, so at Lesman we try to help you determine what’s wrong with your device before you remove it from service. After all, we don’t want you to lose any uptime if it’s something that can be fixed in the field.

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Changing the COM port for a USB HART modem in Pactware

Written by: Dan Weise

I couldn’t communicate with a HART device. The configuration software I was using, Pactware, thought the USB HART modem was on COM 3, while Windows’ Device Manager showed it was actually on COM 6.

COM Port Post

COM Port Post 2

To change the COM port in Pactware to COM 6, I right clicked COM 3 and selected Parameter:

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Why won’t Pactware work with the Siemens LUT 400?

Written by: Dan Weise

I’ve used Pactware for a couple years now, so I was surprised when I couldn’t get the Siemens LUT400 to work with the software. The LUT400 ultrasonic level and flow controller comes with a DTM file that I installed before opening the Pactware software.

The DTM file can be downloaded from this link: http://tinyurl.com/cqk2cky

Once it had been installed, I opened Pactware and updated the device catalog, as seen in the picture below:

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But when I attempted to establish a HART connection to the LUT400, I got an error message:

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Troubleshooting Maxon Shutoff Valves by Sound

Written by: A.J. Piskor

One of the key pieces of any combustion system are the safety shutoff valves. Their job is important, stop the fuel from entering the system when requested or when a fault is detected. With the harsh operating environments and demanding cycling that these valves sometimes go through, internal components have been known to fail. Not only does this bring the shutoff valve down (to a safe position), but it also brings down the combustion system with it.

Maxon shutoff valves are known for their performance, reliability, and durability. In the rare case that one of their automatic reset gas valves (Series 5000/SMA11 or 5000CP/CMA11 for normally closed models, series STOA/SMA21 or STOACP/CMA21 for normally open models) fails to perform, it’s possible that one of the internal components could have gone bad. Each Maxon automatic reset shutoff valve comes with three critical electrical components (solenoid, motor, position switch) that need to work together for the valve to operate properly. By listening to the valve cycle to its energized state, you can detect if any of these critical electrical components needs to be replaced.

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