Data Logging; Real Time Clock - Measurement Computing USB-5200 Series User Manual

USB-5203 User's Guide

Data Logging

Parameter
Standalone power supply
Memory card type
Supplied memory card
Memory card host access
File systems supported
Log file format
Logging rate
Data items logged
Logging start methods
Logging stop methods
Logging status indication

Real time clock

Parameter
Battery backup
Accuracy
Table 14. Data logging specifications
Specification
USB power adapter
2.5 watt USB adapter with interchangeable plugs
(Includes plug for USA)
CompactFlash
512 MB CompactFlash card
USB Mass Storage Device (MSD)
FAT16, FAT32
The device only creates 8.3 file names in the root subdirectory.
binary
Min 1 second between entries, max 232 seconds, 1 second granularity
Timestamp, temperature, or raw reading from selected channels, state of DIO lines, CJC
sensor readings
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 the button

until the LED turns on to begin logging. The first sample is acquired 1 second after the
LED turns 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
turns on. The first sample is acquired 1 second after the LED turns on unless less than
5 seconds have elapsed since power on.
Stop on button press – To stop logging, press and hold the button until the LED turns off.
The device caches logged 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.
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 turns on, but blinks off momentarily

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 turns on and act the same as Start
Logging on Power Up mode.
Start Logging at Specified Time mode: the LED turns off, with a momentary on

flash every second until the specified date/time is reached. At that time, the LED turns
on and acts 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 blinks rapidly (250 ms period).

If the memory card is removed while logging is in progress, the LED blinks rapidly

(250 ms period). Inserting a memory card stops the LED from blinking.
Table 15. Real time clock specifications
Specification
CR-2032 lithium coin cell, replaceable
±1 minute per month
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Specifications