Advisor A90
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The A90 is a universal input panel meter that can display current or voltage process signals in engineering units and temperature directly from a resistance thermometer. The display, which can be configured to be any colour with adjustable brightness, has a high contrast allowing the meter to be read in all lighting conditions from bright sunlight to total darkness. This second generation instrument has been designed and built using the same high quality techniques developed for our industry standard hazardous area products. The A90 is a tough instrument supported by a three year guarantee. The main application of the A90 is to display a process variable or temperature in meaningful engineering units within a process area. The zero and span of the display are independently adjustable allowing the meter to be calibrated to display any linear variable represented by the input voltage or current. Maximum and minimum display values can be shown and a root extractor enables flow measurements to be displayed in linear engineering units. For weighing applications the A90 incorporates a tare function, including a front panel tare annunciator. A two or three wire resistance thermometer may be directly connected to an A90 which can display temperature in a variety of units including °C and °F. The differential output from two resistance thermometers can also be displayed. The A90 meter is configured via four front panel push buttons using a simple intuitive menu structure. An optional security code prevents accidental adjustment. Display calibration may be performed using the meter’s internal references or external standards. The colourful 11mm five digit display and 31 segment bargraph employ a novel technique that allows the display digits to be in any colour on a black background. When fitted with alarms the display colour can be linked to the alarm status. For example, a green display could indicate normal operation, the display changing to red when a high alarm - Optional dual alarms _ Optional isolated 4/20mA output & 24V supply Optional isolated Modbus ' RTU occurs and to blue for a low alarm. The display intensity is fully adjustable preventing dazzle and preserving operators night vision. IP66 front panel protection and a neoprene gasket to seal the joint between the panel meter and the instrument panel, make the instrument suitable for use in areas that will be cleaned with a hose. To simplify installation and maintenance, the A90 meter has removable terminal blocks allowing panel wiring to be completed before the A90 meter is installed. Units of measurement are shown on the slide-in scale card which can be changed on-site without removing the meter from the instrument panel. Meters can be supplied with a printed customer specified scale card for no additional charge. Optional alarms provide two channels, each with a change over relay output which may be independently configured as a high or low alarm. The alarm set points may be adjusted from within the configuration menu, or from the meter display mode via a separate optional security code. In addition to changing the display colour when an alarm is activated, display annunciators show the status of both alarms. An isolated 4/20mA output is available as a factory fitted option. The output comprises a 4/20mA current sink and a 24V isolated power supply. The output may be wired as a current sink or as a current source and may be configured to represent any part of the meter display. When used as a current sink, the isolated 24V supply may be used to power a remote transmitter. An isolated Modbus RTU interface is available as a factory fitted option enabling a modbus master to monitor the variable measured by the A90 and the instrument's status. The A90 panel meter can also be configured via the modbus interface. Other models in this range include the A90-SS which has the same specification but is housed in an impact resistant IP66 stainless steel panel mounting enclosure. Advisor A90 Universal process panel meter with multicolour display ♦ Multicolour display visible in all lighting conditions. ♦ 5 digit 11mm and 31 segment bargraph display. ♦ dc and mains powered models. ♦ Current, voltage or RTD input. ♦ Optional: Alarms Isolated 4/20mA output Transmitter power supply Modbus RTU ♦ Easy on-site scale card installation. ♦ Max and min display ♦ 96 x 48mm DIN enclosure with IP66 front. ♦ 3 year guarantee www.beka.co.uk/a90 BEKA associates Ltd. Old Charlton Rd. Hitchin, Hertfordshire, SG5 2DA, U.K. Tel. (01462) 438301 Fax (01462) 453971 e-mail sales@beka.co.uk www.beka.co.uk

DIMENSIONS (mm) Supply Voltage dc model 10 to 36V dc Display Type Span Zero Decimal point Polarity Zero blanking Direction Reading rate Overrange Input Current Voltage RTD Push buttons & Negative liquid crystal with multicolour backlight. 5 digits 11mm high and 31 segment bargraph. Adjustable between 0 and ±99999 Adjustable between 0 and ±99999 1 of 4 fixed positions, absent or automatic Automatic minus sign Blanked apart from 0 in front of decimal point Display may increase or decrease with increasing input. 4 per second 99999 or -99999 with all decimal points and bargraph...