Measurement Specialties USB-5201 - Manual (Page 25)

USB-5201 User's Guide Specifications
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Microcontroller
Table 8. Microcontroller specifications
Type Two high performance 8-bit RISC microcontrollers
Data Logging
Table 9. Data logging specifications
Standalone power
supply USB Power Adapter
2.5 Watt USB Adapter with Interchangeable Plugs
(Includes Plug for USA)
Memory card type CompactFlash
Supplied memory
card 256 MB CFCARD
256 MB Compact Flash Card for MCC Dataloggers
Memory card host
access USB Mass Storage Device (MSD)
File systems
supported FAT16, FAT32
The device only creates 8.3 file names in the root subdirectory.
Log file format binary
Logging rate Min 1 second between entries, max 2 32 seconds, 1 second granularity
Data items logged Timestamp, temperature or raw reading from selected channels, state of DIO lines, CJC sensor
readings
Logging start
methods Configurable:
 Start Logging on Power Up – Logging begins 5 seconds after power on to allow hardware to
settle.
 Start Logging on Button – Device is idle on power on. Press and hold button until LED comes on
to begin logging. The first sample will be taken 1 second after LED comes on unless less than 5
seconds have elapsed since power on.
 Start Logging at Specified Time – Device is idle until the real time clock indicates the time is
equal to or greater than the specified time, at which time the LED will come on. The first sample
will be taken 1 second after LED comes on unless less than 5 seconds have elapsed since power
on.
Note: Data logging is not allowed when the device is attached to an active USB bus due to
processing limitations. The device must be connected to the standalone power supply to perform
data logging.
Logging stop
methods Stop on button press – To stop logging, press and hold button until LED turns off.
Note: The device caches log data in volatile memory prior to writing to memory card. When
logging, always use the button to stop logging and ensure data is written to memory card prior to
removing power.
Logging status
indication The LED operations when connected to the AC adapter power supply are different than when
connected to USB:
Logging modes:
 Logging Off mode: the LED is off (disabled).
 Start Logging on Power Up mode: the LED is on, with a momentary off flash every time data is
captured.
 Start Logging on Button mode: the LED is initially off. When the button is pressed and held for
approximately 1 second the LED will turn on and act the same as Start Logging on Power Up
mode.
 Start Logging at Specified Time mode: the LED is off, with a momentary on flash every second
until the specified date/time is reached. At that time, the LED will turn on and act the same as
Start Logging on Power Up mode.
Other indication:
 To stop logging and store the remaining data to memory card, press and hold the button until the
LED turns off. It is then safe to remove the memory card.
 If the memory card becomes full the LED will blink rapidly (250 ms period).
 If the memory card is removed while logging is in progress the LED will blink rapidly (250 ms
period). Inserting a memory card will stop the blinking.