Application Notes

How to Control a Remote Pump for a Natural Gas Pipeline

Defining the Problem: A natural gas pipeline has a remote pumping station a mile away and they need to be able to adjust the pumping rate without driving to the site. The pump is controlled by a variable frequency drive. Running control wire is too expensive and also undesirable due to potential surges from lightning…

How to Display and Maintain Tank Levels in a Hazardous Area

Defining the Problem: Chemical manufacturer has various tanks of substances which it combines to manufacture their product. The top of these tanks are a UL rated Class 1 Division 2 hazardous area. They use 4 wire non-contact level sensors and want their operators to be able to read and adjust the tank levels either automatically…

How to Implement Smart Load Sharing with a Pump Controller Application Note

Defining the Problem: A local Public Utility District has a freshwater collection tank that sometimes fills rapidly and other times slowly. At times the main pump could not keep up and a backup pump must be turned on to keep up with the incoming water. The problem is that with the primary pump running most…

How to Monitor Temperature in a Production Furnace Application Note

Defining the Problem: A manufacturer of specialty furnaces needs to monitor their temperature control, provide warnings/alarms for temperature near fault conditions, and document consistent temperatures throughout the sintering process. System Requirements: The solution must take a signal from a thermocouple, have a display for real time visual feedback, record temperatures throughout the batch production for…

How to Wire a 2 or 4-Wire Current Input Module Application Note

Application Note: Current Input Wiring: 2-Wire & 4-Wire TT236 / SP236 / DT236 2/3-Wire Transmitters & Splitters TT336 / SP336 / DT336 4-Wire Transmitters & Splitters Featured Products: DT236: Current / milliVolt Input Two-Wire Dual Transmitter DT336: Current / Voltage Input Four-Wire Dual Transmitter SP236: Two-Wire Current / milliVolt Input Signal Splitter SP336: Four-Wire Current…

How to Keep Heat in Check with Conduction Cooling Application Note

Current application demands of PCI Mezzanine Card (PMC) modules have grown from the simple addition of I/O and low-level communications to the servicing and off-loading of high performance software defined radio (SDR), digital signal processing (DSP), co-processing, and now re-configurable FPGA-based computing with gigabit interfaces. This trend of putting more and more processing power on…