Technical data

Technical Description ________________________________________________________________
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QML201 Logger
The QML201 is a complete data logger with a highly specialized
single board computer (CPU) which makes the measurements and
calculations, controls all system functions and telemetry devices and
logs data. The simplicity of the single board approach reduces the
need for excess interconnecting wires and cables. It also greatly
enhances reliability and reduces the cost of maintaining a spare part
stock. This board contains the 32-bit Motorola CPU for data
processing and 10 differential (20 single ended) analog sensor inputs.
There are also three (3) frequency sensor interfaces, the 16 bit A/D
converter, 1.7 Mbytes of secure Flash memory for data logging, RS-
232 and RS-485 serial ports, a real-time-clock and a power supply
also providing sensor excitations.
The QML201 has an internal Real-Time-Clock with a resolution of 1
second (internally in milliseconds) and stability better than 20
seconds/month. The RTC is backed up with a lithium battery. There is
also the possibility of reading and adjusting the RTC using commands
issued via serial ports, both locally and remotely, e.g. from the central
data collection software. In addition, the RTC can be synchronized by
GPS clock, as an independent device or built-in, e.g. in satellite
transmitters.
Optional modules include, for example, a Compact Flash (CF)
memory card, various communication modules and a built-in pressure
transducer.
QML201 Logger