Sensor Signal Conditioning Cards
Keynes Controls manufactures a range of signal condition cards that can be used for a wide range of applications. The cards can be used to monitor voltage, strain gauges, load cells, temperature sensors etc ...
The Sensor Signal Conditioning Cards can be supplied with an optional USB media converter. The media converters support the SDI12 and RS485 networks.
The media converters can power the sensor interface cards directly from a PC USB Port.
Engineering Units
All of the Keynes Controls Sensor Signal Conditioning Cards supply raw and SI Unit output measurement values.
The use of industry standard aM! and aD! commands to start a measurement and report the measurement allows the cards to be used with many different 3rd party data loggers and acquisition systems.
For distributed applications the aC! concurrent commend is available to make measurements for all the sensors on a network. a = Address on the network.
Sensor and Network Installation
Get your sensor and network installation done with ease. All of the signal conditioning cards use a 5-Way terminal clamp block for network signal connections, and a 6-Way terminal block for the sensor connections. The terminal blocks use spring loaded clamps to attach cabling so soldering is required. Only a small screw driver is required to attach the sensor and network cables.
All cards are supplied with a copy of the Q-LOG Data Acquisition and Display software.
Configuration and Network Selection Menu for the signal conditioning cards in the Q-LOG Software
Connectors A = Network Connector B = Sensor Connector.
Intelligent Strain Gauge / Load Cell Interface
The NP-1-STRAIN-24-SD45 card offers 24 bit resolution, low noise signal conditioning for strain gauges and strain gauge based load cells. The card supports full quadratic and linear configuration options for the strain gauge sensor, and full Steinhart-Hart calibration factors for the temperature sensors. Enhanced addressing is available for this product.
In these pictures you can see the quarter bridge and half bridge sensor connection options. The temperature sensor can be extended to fit adjacent to the structure under investigation in order to provide local temperature compensation readings.
The NP-1-STRAIN-24-SD45 can be used with foil strain gauges, resistance based strain gauges, load cells, resistance based displacement sensors.
Part Number : NP-1-STRAIN-SDI485
Please note: All products have been designed and manufactured by Keynes Controls. Specifications Include: Single channel 24 bit Strain Gauge / Load Cell Interfaces supports 120 / 350 / 500 Ohm Gauges. Incorporating SDI12 and RS485 Communications Port and optional RTD temperature sensor. Full, Half and Quarter Bridge Support.
Load Cell
The NP-1-STRAIN-24-SD45 card can be used with many different load cells The cards can be used to turn a standard sensor into a network device.
strain gauge load cell, strain gauge amplifier, strain gauge interface, strain gauge measurement, foil strain gauge
Temperature Sensor Interface
Keynes Controls temperature sensor interface cards support PT100, PT1000 thermistors and a full range of thermocouple sensors such as J, K, N, T, S, B, R type sensors. All of the cards offer 24 bit resolution, integrated sensor signal conditioning cards with SDI12 and RS485 digital communications.
Part Numbers: NP-1-PT100-24-SD485 NP-1-PT500-24-SD45 Thermistor cards
NP-1-THERM-24-X-SD485 where X = Thermocouple type.
Voltage Measurements
Keynes Controls manufactures a range of signal condition cards designed to measure voltage. The cards all support 24 bit resolution, over voltage protection, SDI12 and RS485 digital communications. Ranges from 50 V to 50 mV are available. Keynes Controls can customise the cards on request.
Waterproof Enclosure
The waterproof enclosure shown opposite is used to protect the Keynes single and dual channel signal conditioning cards. The enclosure enables the cards to deployed close to the sensor installation. Measurements can be taken close to the location of the sensors and sent digitally to a Data Recorder or Data Acquisition System.
Sensors supported. PT100, PT500, PT1000, Strain gauge, full bridge, half bridge, quarter bridge, pressure sensor, silicon pressure sensor, Load cell, galvanic measurement, thermocouple, Type K, Type J, Type T, Type R, Type S, voltage measurements. RTD, resistive temperature sensor, conductivity, salinity.