Connecting A Voltage-Output Signal Source To Multiple Loads

The Tech Support crew here at Kele frequently gets quizzed by customers who have a voltage-output signal source which must drive multiple voltage-input loads. Requests for “voltage signal replicators” come in frequently. Sometimes extra hardware is needed, but sometimes it isn’t! So we thought it might be a good idea to write an article addressing […]

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Hot and Steamy Pig Tails! How to Measure the Pressure of Steam Without Breaking Your Pressure Transmitter

So, in checking the specs, the PTX1-06, can read pressure up to 200 degrees Fahrenheit, like most pressure transmitters in the marketplace. But, steam is steam at 212 degrees Fahrenheit. How’s that going to work? This little piggy says to put a copper extender on a pig tail, and shoot the steam to the side […]

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Temperature Sensor Curve ID Numbers

  Need help figuring out what type sensor you need for your automation system?  This handy temperature curve chart might help.  If not, give Kele a call!   Sensor Type Temperature Sensor Description  Typical Sensor User 3 10,000Ω @ 77°F, Type III material    AET, American Automatrix, Andover, Carrier, Delta, Invensys, Teletrol, York 21 2252Ω @ […]

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Time Delay Relay Functions Explained

Understanding the differences between various time delay relay operations such as On-Delay or Interval can be a bit confusing.   These simple diagrams may make it easier to visualize what’s happening during the timer operation(s).               At Kele, our goal is to make product selection and usage as easy as […]

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Extend Your Reach with the ST-A Series by Precon

Kele’s Precon brand has a sensor solution for ALL your application needs, even the odd ones! Job site situation #1: You need a temperature sensor for your tank or cooling tower sump, but they don’t make one long enough. Special ordering one seems daunting. What if it doesn’t work out and you can’t send it back? […]

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Green Buildings need Clean Electrical Power for Sustainability

Major changes are taking place in the United States as we all move forward to reduced energy consumption and utilization of renewable energy sources in our homes, offices, campus environments, and factories. As new technology becomes available with ever increasing returns on investment many owners are ready to become part of the “Green Movement” that […]

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THE (RS-485 Network) TERMINATOR Or The Dance of the Data Pulses

If you’re involved with building automation systems you know (unless you’ve been living under a rock like the guy in that insurance commercial) that the modern trend is to connect all your building controls together on networks. Networks make it easy to add or move control nodes as your building control needs change since the […]

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What Are Power System VARs?

Most people involved in building automation are familiar with kW, which is the rate at which a building is consuming energy from the power company. But there is another power system parameter known as VAR/kVAR which is less well understood. In this article we will attempt to dispel some of the VAR mystery. The term […]

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AC to DC – Linear Versus Switch-Mode Power Supplies

For years, Kele has provided dependable, quality 24 VDC power supplies like the DCP-1.5-W, DCPA-1.2, DCP-250, PW2, and the SLS Series. All of these DC power supplies are “linear” power supplies. Another type of DC power supply gaining popularity with building automation and temperature control contractors is called a “switch-mode” power supply (PS6R Series). While both […]

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Get Ahead of the Curve

Understanding and then selecting the right temperature curve might seem like a daunting task. To a newbie, it might seem impossible but there is a logical, systematic method to selecting the right temperature sensor.   Basically, the thermistors we use in our systems have negative temperature coefficients meaning as the temperature rises, the corresponding resistance […]

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