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1.1
USB DEVICE PRECAUTIONS
Note: The use of U3 USB Flash drives is not recommended.
1.
Precautions against electrostatic discharge should be taken when the instrument terminals are being
accessed. The USB and Ethernet connections are particularly vulnerable.
2.
Ideally, the USB device should be plugged directly into the instrument, as the use of extension leads may
compromise the instrument's ESD compliance. Where the instrument is being used in an electrically
'noisy' environment however, it is recommended that the user brings the USB socket to the front of the
panel using a short extension lead. This is because the USB may 'lock up' or reset in noisy environments
and the only means of recovery is to remove the device, then re-insert it. For memory sticks, EMC-related
failure during a write operation might cause corruption of the data held on the stick. For this reason, the
data on the memory stick should be backed up before insertion and checked after removal.
3.
When using a USB extension cable, a high quality screened cable must be used. The total length of USB
cable between the device and the USB port must not exceed 3m (10ft).
4.
Most barcode readers and keyboards are not designed for use in industrial EMC environments, and their
operation in such environments may result in impaired performance of the recorder/controller.
1.2
32-BIT RESOLUTION
Floating point values are stored in IEEE 32-bit single precision format. Values which require greater resolution
than is available in this format are rounded up or down.
1.3
SYMBOLS USED ON THE RECORDER LABELLING
One or more of the symbols below may appear as a part of the recorder labelling.
A
September 18
FEC920: USER GUIDE
Refer to manual for instructions
This unit is CE approved
C-Tick mark for Australia (ACA)
and New Zealand (RSM)
Underwriters laboratories listed mark for
Canada and the U.S.A.
For environmental reasons, this unit must be
recycled before its age exceeds the number of
years shown in the circle.
A5E45696052A Rev-AA
Risk of electric shock
Precautions against static electrical discharge
must be taken when handling this unit
Ethernet connector
USB connector
Protective conductive terminal
(Safety Earth)
Page 3
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