Mercoid Series EDA electronic pressure control gauge

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The Mercoid Series EDA electronic pressure control gauge is a compact package that can replace a separate gauge, two switches and a transmitter in a system saving money, installation time and panel space. The EDA incorporates two SPDT relays that have the on and off points fully adjustable over the range for control or alarm use. The front face has LED indicators for switch status and a large backlight two-line display showing process value and indication units.

Programming is easy with simple menu structure, two-line display and external programming buttons. The weatherproof housing is suitable for a wide variety of applications with panel-mount, flush-mount or pipe-mount ability. Features include zero set, adjustable dampening, menu lock out, peak and valley indication, removable terminal blocks, adjustable time delay and scalable transmitter output.

Pressure can be displayed in psi, kg/cm², bar, in Hg, ft w.c., kPa, MPa, %FS, in w.c., mbar, cm w.c., mm Hg, or oz/in², depending on the chosen range. A test mode simulates input over the range without pressuring to easily test switches and transmitter output function.

Failsafe capabilities are provided for sensor failure, over pressure, high temperature limit, low temperature limit, or keypad short, with user-selctable choice of relay de-energised, energised or no action. With the transmitter option, the user can choose an output of 3.6 mA, 22 mA or no action. There is also a selectable alternation of set points between the relays for even wear on duplex pump applications.