Technical data

Chapter 10 ____________________________________________________________ Technical Data
VAISALA________________________________________________________________________ 69
CHAPTER 10
TECHNICAL DATA
QML201 Logger
QML201 Logger Specifications
Property Description / Value
Processor 32 bit Motorola
A/D conversion 16 bit
Data logging memory 1.7 Mbytes internal Flash memory
Several hundreds Mbytes on optional
Compact Flash memory card
Sensor inputs 10 Analog inputs (20 single ended inputs)
2 counter / frequency inputs
Internal channel for PMT16A pressure
transducer
Typical accuracy across
measured temperature
range –50 °C ... +80 °C
Better than ± 0.06 °C
Maximum error across
measured temperature
range –35 °C ... +50 °C
Less than ± 0.12 °C
Maximum error at 0 °C Less than ± 0.06 °C
Voltage measurement
±2.5V range
±250mV range
±25mV range
±6.5mV range
With factory calibration:
Better than 0.04 % reading ± 150 µV
Better than 0.04 % reading ± 20 µV
Better than 0.04 % reading ± 6 µV
Better than 0.12 % reading ± 6 µV
Frequency measurements 0.003 % + resolution 241 nsec (up to 10 kHz)
Common mode range +5 V / -4 V
Real-time clock
Standard
With GPS option
Better than 20 sec/month
Configurable, default 5 sec/month
Serial communication
Standard
Optional
One RS-232, one RS-485
Two (2) optional plug-in slots for
communication modules to increase the
number of serial I/O channels up to 7 pcs