microDAQ Series
microDAQ 2 Smart Pressure Scanner

– Intelligent pressure scanner module with engineering unit output.
– Compatible with all TE/PSI 32 and 64 channel Pressure Scanners (including QDC options).
– Up to 0.05% FS accuracy output.
– Complete with IEEE 1588 PTPV2 time stamping
– Up to 3Khz per channel measurement frequency.
– Output over Ethernet (100Mbit TCP / UDP) and CAN.
– Rugged enclosure for on-vehicle applications.
– Fully configurable over Ethernet with embedded web server


The microDAQ2 is a further development of the well- established Chell microDAQ system. The microDAQ2 is a complete acquisition system giving the user fully calibrated, temperature compensated data on easy to use Ethernet and CAN interfaces.


The Ethernet output enables the microDAQ2 to be directly connected to a PC or via a switch for multiple unit applications. The microDAQ2 web server enables to user to configure the data output in terms of interface type, speed, averaging and temperature compensation giving the user complete control of the data.


microDAQX software is supplied with the microDAQ2 which can communicate with up to 16 x microDAQ2’s, display the data and log it to disk. When more than one microDAQ2 is used, the data can be synchronised and the data presented as one complete data file.


The command interface for the microDAQ2 is straight-forward and fully documented allowing users to easily create their own software interface. In addition, a LabView driver can be supplied free of charge.


The microDAQ2 contains a TE ESPTM pressure scanner with which it interfaces and gives the user full access to all of its features. The DTC scanners
contain all their coefficients in an EEPROM and the temperature of every transducer is measured to calculate the exact compensation required. The DTC scanners also contain a 3X deranging option and shuttle valve position sense and all these functions can be accessed by the supplied software.


The microDAQ2 features multiple ADC’s allowing the simultaneous acquisition of pressure and temperature data. The temperature input is used to continuously update the pressure output ensuring thermally compensated data without the ‘thermal bump’ associated with systems that periodically acquire the temperature input.


The microDAQ2 multiplexes at 50kHz (20kHz for legacy scanners) enabling it to produce data at more than 1.5KHz per channel for a 32-channel model and 750Hz per channel for a 64-channel model via UDP. For TCP/IP, the maximum speeds are 1kHz and 500Hz per channel respectively. In ‘Fast Mode’, the first 16 channels can be selected only enabling speeds of 3kHz per channel to be achieved. The microDAQ is packaged and vibration tested to enable it to withstand the harsh environments of on-vehicle testing.