User manual - DATA RECORDER SRD-99 and cooperating software
2.
GENERAL CHARACTERISTICS
•
Multifunctional
Device
is designed for recording, displaying current or averaged values and
presentation of technological parameter trends in graphic form.
•
Large data storage capacity
The registered measurement results are recorded in the unit's memory. The
capacity of installed memory allows to store:
–
over 500 000 measurements (2MB) for units equipped with RS-485 interface
–
over 2 000 000 measurements (8MB) for units equipped with RS-485 interface
and USB Host port.
•
Configurable measurement and control input
The unit has up to 8 channels (depending on version) of measurement signals and
one digital voltage input with programmable functions, e.g. control of the recording
process. Each signal can be freely configured and described. Depending on device
version all measured parameters must be available as current type signals
(0-20 mA or 4-20 mA standards) or resistance (Pt100, Pt500 or Pt1000 standards).
The internal analogue-digital converter has a 12 or 16 bit resolution (depending on
input type), which provides high measurement resolution results. Additionally,
individual alphanumeric description (text) of each of the recorded channels is
possible.
•
Fast serial interface
The data logger is fitted with a galvanic isolation RS-485 interface, programmed
with ModBus RTU transmission protocol. This enables the connection of a number
of data recorders into the network, remote collecting of data from each unit and also
remote configuration. The application of the RS-485 interface instead of RS-232 is
due to the possibility of achieving high transmission speeds using transmission lines
of larger length than is possible with the RS-232 interface.
•
Built-in USB Host interface (optional)
Optionally the device can be equipped with built-in USB Host interface, allowing for
data transfer to popular USB Flash Drives (PenDrives). This method allows for
significant simplification of unit application: it is no longer necessary to connect PC
and data logger via RS-485 interface.
Significant acceleration of data transfer is an additional advantage: data download
can be 10 times faster than using RS-485 interface.
WARNING!
Device should work properly with any standard Flash Drives, but
manufacturer can not guarantee proper cooperation with non-standard devices, or
with devices developed after data logger release.
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