Signal Conditioning

Sensors that are used to collect the data from the environment often donít produce signal of characteristics optimal for an analog to digital converter (ADC) to translate to digital data. Additionally, these signals can be subject to electromagnetic interference (EMI) that introduces noise, having a negative impact on the reliability of the data. To make this analog input readable for the processing unit and dependable enough to give the desired quality of data the signal has to undergo a process of signal conditioning.

Signal conditioning is one of the key components of data acquisition systems that makes inputs usable for a DAQ system. When working with different ground voltages, proper isolation of the signal line is required as signals outside of the specified range of the ADC circuit can damage the sensitive components of the measurement system. Depending on the sensor, the signal might also need to have a higher amplitude to be effectively read by the digitizer, therefore requiring to be amplified, or a lower amplitude, therefore being in need for attenuation. Other signals might need to be linearized to be easier to analyze or filtered from external interferences coming from the environment or the system itself. Sensors like accelerometers will need current or voltage excitation before anything can be done with the input. Knowing the properties of the signal and the system is therefore the key to choosing the right set of conditioners for a precise and reliable measurement unit.


Signal Conditioning Products
MODEL DESCRIPTION
AIM-16 Sub-Conditioner and Sub-Multiplexer
IIB-24 Digital signal-conditioner - converts 24 TTL inputs into optically isolated inputs
(allows reading 3 to 31VDC or VAC signals with any standard TTL digital input port)
LVDT-8U 8-Port LVDT / RVDT Excitation, Signal Conditioning
ROB-8A 8-Port Electromechanical Relay Card
ROB-24 24-Port Electromechanical Relay Card
ROB-24H 24-Port Electromechanical Relay Card, High Current Rating (For add-on options, see ROB-24)
A16A Solid-state I/O Modules and Cards
A24A Solid-state I/O Modules and Cards

Acquisition, Control, Communication: Engineering and Systems

olark('api.rules.defineRule', { id: 'delayed_response', description: 'Will send a response to the visitor after an operator doesn't respond.', condition: function(pass) { olark('api.visitor.getDetails', function(details) { var delay = 60 / details.messageCountForThisVisit; if (details.isConversing && details.secondsSinceLastMessageToOperator >= delay && !details.secondsSinceLastMessageToVisitor) { pass(); } }); }, action: function() { olark('api.chat.sendMessageToVisitor', { body: 'Sorry about the delay. We'll get back with you as soon as possible ... but it might be via e-mail, especially if it is currently 2am Pacific.' }); olark('api.chat.sendNotificationToOperator', { body: 'Automated delay message has been sent to visitor.' }); }, perVisitor: true });