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Hawker Electronics - 990 Signal Processor
For use with all standard Liquid Level Sensors
Simple set up menu
mV and mA transducers
RS232 serial communications
Built in simulator
Negative offset compensation
Unique display feature
Forward or reverse acting
The Type 990 is a signal processing unit that takes a signal from an input device such as a level
sensor, normally situated in a vessel. It provides an analogue and digital retransmission output,
which is generally used for indication, control or alarm applications.
The unit accepts signals from a wide range of remote instruments, including the Hawker Flexicap,
Sondaloop and other pressure transducers and transmitters.
Once it has been calibrated, the input signal is displayed on the internal LCD as a percentage in
the range of 0 to 100.0. The user may calibrate the LCD full scale percentage over any part of the
vessel. The retransmission output provides an analogue current and voltage proportional to the
user calibrated input, as well as a digital transmission communications link via RS232. Other
special functions can be programmed by the user, such as a reverse acting display or reverse
acting transmission output, which are accessed through the Type 990 menus.
The Type 990 provides power for transducers or loop powered transmitters and can accept a direct
signal input for a transmitter with an external power supply, ask for connection drawings.
The Type 990 can be set to run in ‘simulator mode’ where it effectively becomes a precision current
or voltage source, this is useful for calibration during commissioning, and for diagnostic purposes.
Setting up is simple using only 2 pushbuttons and the LCD on the front of the unit, which provides
very accurate and fast commissioning.
Please note - Product designs and specifications are subject to change without notice. The user is responsible for determining the suitability of this product.
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