ISEN Paperless Recorder is a digital industrial recording and monitoring device designed to collect, display, store, and analyze process signals from multiple instruments. It provides a practical alternative to traditional paper chart recorders by storing measurement data electronically while displaying real-time values and historical trends on a color screen.
Depending on the selected configuration, the recorder can accept multiple signal types, including DC current, DC voltage, frequency, millivolt signals, thermocouples, and RTD sensors. It can also provide transmitter power, relay alarm outputs, data backup, historical curves, reports, printing, and serial communication.
The product family includes compact configurations for a smaller number of channels and larger configurations supporting up to 16 universal input channels, making it suitable for different levels of industrial data acquisition and process monitoring.
Multi-Channel Universal Input for Process Signals
One of the main advantages of the ISEN Paperless Recorder is its ability to collect different types of industrial measurement signals in one device. Instead of installing a separate recorder for each sensor type, the universal input architecture allows various process instruments to be connected to the appropriate input channels.
Supported signal types include:
- DC current input
- DC voltage input
- Millivolt input
- Thermocouple (TC)
- Resistance temperature detector (RTD)
- Frequency input
The larger configuration supports up to 16 input channels, while smaller configurations are available with 4, 8, or 12 channels. The measurement period is specified at 1 second, with a 16-bit resolution for the analog input board.
For frequency signals, the specified input conditions include a low level of 0–2 V, high level of 4–24 V, duty cycle from 10% to 90%, and minimum drive current of 5 mA.
This flexibility allows the recorder to be used for temperature, pressure, flow, level, electrical, and other process measurements when the corresponding sensor or transmitter provides a compatible signal.
For 4–20 mA transmitters, the recorder can also provide 24 VDC transmitter power output in applicable configurations. This simplifies wiring by allowing compatible two-wire transmitters to receive their supply directly from the recorder.
Real-Time Display and Historical Trend Monitoring
The ISEN Paperless Recorder provides a color display for viewing current process conditions directly at the installation point. The display can show measured values, channel numbers, engineering units, alarm status, cumulative information, and other operating information.
The color TFT display is specified at 3.5 inches with 320 × 240 pixels for the corresponding configuration. Four display units can be shown, while each channel can be assigned a device name and engineering unit.
Measurement information can be displayed in several forms, including:
- Digital numerical values
- Bar graphs
- Real-time curves
- Historical curves
- Alarm status
- Function menus
- Recording and storage information
Historical curves can be reviewed directly on the screen, and the stored trend can be magnified at multiple levels, including 1×, 2×, 4×, 8×, 16×, and 32×. The trend display can also be configured in horizontal or vertical formats, with customizable curve colors.
This makes the recorder useful not only for storing process data but also for checking how a parameter has changed over time. Operators can review historical trends to identify abnormal fluctuations, process instability, or changes occurring before and after an alarm event.
Electronic Data Recording and Long-Term Storage
A paperless recorder replaces traditional chart paper with electronic data storage. The ISEN system can continuously record measurement values and maintain historical information for later review, analysis, backup, or printing.
Recording intervals can be configured according to the application. The available settings include intervals such as 1 second, 2 seconds, 10 seconds, 1 minute, 2 minutes, and 5 minutes, with longer recording periods available when a longer interval is selected.
The actual storage duration depends on factors such as the number of active channels and the selected recording interval. Reducing the number of recorded channels can extend the available recording period, while a longer recording interval allows more historical data to be retained.
Batch recording is also supported, with the maximum recording gap specified at 30 minutes.
For data backup, the recorder can be configured with USB and SD card functions. The available specifications include an 8 GB SD card and USB connection options.
This electronic approach eliminates the need to regularly replace chart paper and makes historical measurement data easier to store, retrieve, and transfer.
Alarm Monitoring, Reports and Printing Functions
The ISEN Paperless Recorder is more than a data logger. It also provides alarm monitoring and reporting functions for applications where process deviations need to be identified quickly.
Each channel can be configured with up to four alarm points. Supported alarm types include high alarm, low alarm, incremental alarm, and decremental alarm. The alarm delay can be configured from 0 to 10 seconds, helping prevent unnecessary alarms caused by short-duration signal fluctuations.
When an alarm occurs, the corresponding channel displays its alarm status on the screen, and the event is recorded in the alarm history. The alarm output can also be connected to the internal relay.
This allows the recorder to perform functions such as:
- High-temperature warning
- Low-pressure alarm
- High-level alarm
- Low-flow warning
- Process deviation monitoring
- Equipment protection
The system also supports reporting functions such as daily, monthly, and yearly reports, along with shift reports, alarm records, system logs, power records, and cumulative reports.
For installations requiring physical records, optional printing functions are available. Printing can be performed manually or according to a scheduled time, depending on the selected configuration. Historical data, timing data, curves, and cumulative reports can be printed through the compatible printer interface.
Communication, Data Backup and System Integration
The ISEN Paperless Recorder can be integrated into an industrial automation or data management system through its communication interfaces.
Available communication options include RS232C and RS485, with RS485 supporting the Modbus-RTU protocol. Communication speeds can be selected from 1200 to 115200 bps, depending on the system configuration.
This allows recorded process information to be exchanged with compatible PLCs, computers, SCADA systems, or other supervisory equipment.
The recorder also provides USB and SD card functions for data backup and transfer. An Ethernet communication option is available for applicable configurations, providing another interface for connecting the recorder to an industrial network.
For applications involving centralized data management, compatible machine data management software can also be selected. This creates a pathway from field measurement signals to local recording and, where required, higher-level data management.
The combination of local display, electronic storage, removable data media, serial communication, and optional Ethernet communication makes the recorder suitable for both standalone monitoring and integration into larger industrial systems.
Technical Specifications and Industrial Applications
The ISEN Paperless Recorder is designed for industrial environments where multiple process signals need to be monitored and recorded continuously. The wall-mounted configuration has an external size of approximately 280 × 242 × 157 mm and a net weight below 2.5 kg, excluding optional components. The corresponding power specification is 220 VAC, with an allowable voltage range of 100–240 VAC, 50 Hz, and power consumption of up to approximately 20 W with optional functions included.
A larger waterproof color configuration supports up to 16 universal inputs and provides sensor distribution output, relay alarm output, transmitter output, flow totalizing and reporting, historical data storage, on-site printing, and serial communication.
Typical applications include:
- Process manufacturing: recording temperature, pressure, flow, level, and other process variables.
- Water and wastewater: monitoring pump stations, treatment processes, tanks, and water systems.
- Energy and utilities: recording temperature and process parameters in power and utility systems.
- Chemical and petrochemical: monitoring multiple process variables and maintaining historical records.
- Food and pharmaceutical processing: recording temperature and other critical production parameters.
- Industrial automation: collecting signals from multiple transmitters and sensors for local monitoring and control.
When selecting an ISEN Paperless Recorder, Valvelink recommends considering the number of input channels, signal types, required measurement range, recording interval, storage capacity, alarm requirements, transmitter power requirements, communication interface, printing requirements, and data backup method.
For systems that need centralized monitoring, the required RS232, RS485/Modbus-RTU, or Ethernet interface should also be considered during selection.
With multi-channel input, real-time visualization, historical trend recording, alarm management, electronic data storage, reporting, and industrial communication options, the ISEN Paperless Recorder provides Valvelink customers with a practical solution for continuous process monitoring, data recording, and historical analysis without relying on traditional paper charts.
