Operator Interfaces, Switches & Relays


Fast dual indicator

March 2008 Operator Interfaces, Switches & Relays

Since its launch in 2000, the BA326C 4-20 mA loop powered combined analogue and digital indicator from BEKA has become a favourite among users requiring intrinsically safe equipment. The instrument has recently been updated to increase the analogue display refresh rate to four readings per second, further extending the capabilities.

New display features have been added to the versatile indicator
New display features have been added to the versatile indicator

The combination of a 100 segment fast analogue bargraph and a 4½ digit display provides operators with a quick, easy to read indication of magnitude and trend, plus an accurate numerical value in engineering units.

The BA326C has ATEX Group II Category 1G (EEX ia IIC T5) intrinsic safety certification. The 4-20 mA input terminals comply with the requirements for simple apparatus and only introduce a 1 V drop in the loop, allowing the indicator to be connected in series with almost any 4-20 mA intrinsically safe circuit.

Housed in a 144 X 48 mm DIN enclosure, the instrument has an IP65 front panel and a gasket seals the joint between the instrument and the panel. Control and calibration are performed via four front panel push buttons that can be protected from tampering or accidental adjustment by a user selectable four digit security code.

Accessories include dual alarms with galvanically isolated solid state outputs having independent set points which, for easy comparison with the 4-20 mA input, are displayed on a second parallel bar-graph together with alarm status. Optional sixteen point linearisation allows most non-linear inputs to be displayed in linear engineering units, for example the volumetric contents of a cylindrical tank can be displayed directly from a level signal. The BA326C can be supplied with a separately powered display backlight that enhances daylight viewing enabling the instrument to be read in all lighting conditions.



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