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Data Logger Doric Digitrend 245
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• Measures up to 500 Inputs
• Rugged Front-end Modules with Remote Capability
to 1600 Meters (5000 Feet)
• 250 Unique Alarm/Limit Trips Dual RS232-C I/O Ports
• Up to 10 Logging Jobs Operate Simultaneously
Data Logging The Way You Want It
Digitrend 245A collects up to 500 analog input measurements,
then conditions the signals in the mainframe. The results
are displayed on a crisp, clear digital readout and expressed
in engineering units such as temperature, pressure,
flow, level and pH. Further, the system can monitor
as many as 96 digital inputs, grouped to form BCD data
or received individually from limit or valve-position
switches for status or event sequence monitoring.
In addition to on-demand (manual) logging, the system
can be set up to perform a number of simultaneous automatic
features. These include up to 10 logs at independently
specified time intervals on selected points or groups
of points in the alarm (periodic logging), as well as
continuous alarm monitoring and logging of selected points
on alarm transition. The 245A can even be programmed ti
skip points to enhance its scanning speed.
Designed For Easy, Accurate Operation
Even with all it can do, the 245A is extremely simple
to use. The front panel keyboard-splash-resistant and
electronically shielded for environment protection, has
just 10 numeric and 18 function keys. Operators require
minimal training and appreciate the way the 245A simplifies
data logging in your busy work environment. And there's
far less possibility of human errors.
Doric's Outstanding Family of FEMs
Doric's exclusive FEMs make the 245A a standout system
by delivering significant performance benefits and the
lowest possible total installed cost, particularly in
hazardous environments.
Each FEM is a completely self-contained analog-to-digital subsystem that
handles up to 20 analog inputs. You add FEMs (and 245S satellites) to your system as your needs grow, expanding monitoring to as many as
500 analog points.
The compact FEM can be plugged directly into the mainframe
or satellite, placed a short distance away or located
up to a mile from the mainframe. Once connections
to the process are made, quick disconnect terminals assure
easy swap-out of FEMs without undoing all your input connections.
Superior environmental specifications mean the FEM can be placed right where the measurement
is, keeping the mainframe in a less harsh environment. Temperature from 0° to 70°C pose no problems. Expensive environmental protection
is often unnecessary, thanks to the rugged cast aluminum construction of the FEM housing and protective coating of the circuit assemblies.
High Accuracy, Low Costs
The FEM transmits reliable digital pulse signals for long
distances. And there is no degradation of the information
being transmitted from common mode voltage pickup, distributed
capacitance effects or spurious interference. Excellent
noise rejection comes from dual-slope integration analog
to digital conversion, combined with advanced filter design
that provides 130 dB CMR for common mode voltages of up
to 250V RMS, as well as superior RFI rejection. In addition,
locating the FEM at the measurement source reduces the
level of noise pickup that must be filtered in the first
place. The full 16-bit (65,000 count) digital resolution
of the analog output by the FEM permits determination
of the temperatures to 0.1° and other measurements
to 0.5 microV with accuracy's of 0.01% reading or better.
As always, precision has its price. But the Digitrend
245A, that price is remarkably low. First, the system
is modular so you buy only the number of monitoring points
you need. Even more important, however, is the way the
FEM concept cuts installation costs to new lows.
Data Logger Doric Digitrend 245
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