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The OMB-CHARTSCAN-1400 is a next-generation recorder that combines the ease-of-use common in paper-based strip-chart recorders with the advanced features of PC-based data acquisition systems. The CHARTSCAN╒s convenient BNC, safety jack, subminiature plug, and screw terminal connectors make signal connection easier than other data recorders or loggers.
The OMB-CHARTSCAN-1400 is a compact, portable instrument which scans at 147 readings/s. Because of its unique configuration, the OMB-CHARTSCAN-1400 offers an unrivaled low cost per channel. It connects to a computer via an RS-232 interface, Hayes-compatible modem, optional IEEE 488, or optional RS-422/485 interfaces; and can stream data direct-to-disk (your PCs hard drive) in real time. For stand-alone operation, the OMB-CHARTSCAN-1400 comes standard with 128K readings (256 Kbytes) deep memory that is expandable to 4M readings (8 Mbytes).
Chartview Software
The OMB-CHARTSCAN-1400 includes ChartView, Windows based setup and acquisition application. ChartView provides a graphical spreadsheet style user interface that lets you easily configure your hardware, acquisition and display parameters. ChartView features a no programming approach that enables data collection and display within minutes.
ChartView provides a number of data display options including a real-time smooth scrolling trend display, digital meters analog meters and bar graph meters. The collected data is stored to disk in an ASCII format so it may be easily imported into other applications, such as Microsoft Excel, for post acquisition display and analysis. In addition, ChartView also provides a real-time link to Excel using Dynamic Data Exchange (DDE). The OMB-CHARTSCAN-1400 also includes PostView, a post acquisition graphics display program that integrates seamlessly into ChartView. Using PostView╒s intuitive on-screen controls, you can expand, contract and auto-scale wave forms as well as scroll in either direction. PostView also provides hardcopy printout of the waveform.
The Standard ChartView is included with the OMB-CHARTSCAN-1400. An optional enhanced version of ChartView, ChartView Plus, is also available. The table to the right summarizes the differences between ChartView and ChartView Plus.
Isolated input
The OMB-CHARTSCAN-1400 is ideal for temperature and voltage measurements that require channel-to-channel isolation. The OMB-CHARTSCAN-1400 provides 500 V isolation for high voltage applications using the OMB-CSB14-HV-S modules and 200 V isolation when the thermocouple and other voltage modules are used. The OMB-CHARTSCAN-1400 achieves this high isolation by using individual relays on each channel, yet still maintains a very fast 147 channels/s scan rate.
FASTER SCANNING
The OMB-CHARTSCAN-1400 offers a faster scanning than typical strip-chart recorders and exceeds the typical two Hz rate found on most strip chart, multi-point or hybrid recorders. The unit provides an array of scanning capabilities to meet your applications requirements. Because data-logging and chart recording applications frequently require the logging at fixed time intervals, the OMB-CHARTSCAN-1400 uses the standard hours-minutes-seconds (hh:mm:ss.s) format to specify the time interval between channel scans. Users can configure the unit to begin and end data logging on a specified event such as TTL signal, temperature level, IEEE GET, alarm condition, absolute time of day, or upon completion of a specified number of readings.
EXPANSION OPTIONS
The OMB-CHARTSCAN-1400 can accommodate up to four plug-in option modules for a total of 64 channels. For larger systems, OMB-CSN-EXP expansion chassis connects directly to the main unit to allow four additional plug-in modules, expanding the system from 64 to 128 channel capacity. Power is derived directly from the main unit so no additional power supplies or cables are required.
Programmable Scan Rates
The OMB-CHARTSCAN-1400 offers programmable scan rates for applications requiring acceleration of the measurement rate on a specified event, such as an alarm condition. For example, you can program the instrument to scan once per minute and then, upon the occurrence of a specified alarm condition, switch to scanning once per second. Upon cessation of the alarm condition, the unit resumes scanning at the rate of once per minute.
Accuracy
The OMB-CHARTSCAN-1400 has a number of features and capabilities that enable it to deliver the high accuracy demanded by many research applications.
High Resolution
The OMB-CHARTSCAN-1400 is equipped with a high-speed 16-bit A/D converter. This enables the OMB-CHARTSCAN-1400 to offer up to 0.1íC and 3.05 ╡V resolution with the OMB-CSN14-TC-P thermocouple/volt scanning module.
Noise Filtering
The OMB-CHARTSCAN-1400 reduces noise by sampling and averaging 32 measurements per line cycle. The
OMB-CHARTSCAN-1400 also offers the flexibility to average across multiples of 1, 2, 4, or 8 line cycles.
Alarms
Detecting an alarm condition is a common requirement in logging applications and the OMB-CHARTSCAN-1400 offers a number of modes to facilitate alarm detection. With 32 digital TTL alarm outputs available on the 50-pin rear panel connector
or 16 outputs via the high-current capacity OMB-CSN-RELAY option, multiple conditions can be set and monitored. Unlike some instruments which allow only one channel to be assigned to a single alarm output, the OMB-CHARTSCAN-1400 allows one or more channels to be logically ╥OR-ed╙ and connected to an alarm output.
Real-Time Clock
The OMB-CHARTSCAN-1400 features a real-time clock that allows you to synchronize acquisition to a specific time of day. During acquisition, the
OMB-CHARTSCAN-1400 stores the time and date of every data scan in memory, enabling later retrieval of this information for use in plotting and analyzing measurements.
Memory
For high-speed and long-term data logging, the
OMB-CHARTSCAN-1400 is equipped with 128K readings of data storage, which can be field expanded to 4M readings. Since each application requires different measurements, the unit makes each channel╒s high, low, and last readings available throughout acquisition.
Communication
Connecting your computer to the
OMB-CHARTSCAN-1400 is simple via the standard RS-232 interface. In addition, optional IEEE 488 and RS-422/485 interfaces can be added via a simple plug-in module.
Temperature & Voltage Modules
OMB-CHARTSCAN-1400 input modules are ideal for making isolated temperature and voltage measurements. Each features 16 isolated inputs and plugs directly in the OMB-CHARTSCAN-1400.
Depending upon the module and signal input, each card uses either standard BNC, safety jack, removable screw terminal block or thermocouple plugs for quick and easy input connections. The modules slide into a shielded metal enclosure within the OMB-CHARTSCAN-1400, keeping noise to a minimum and maintaining a stable internal temperature for accurate CJC reading.
All scanning modules for the OMB-CHARTSCAN-1400 feature isolated differential input capabilities that can make accurate measurements in high common-mode voltage applications.
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