- Universal input Channels
- Custom Linearization
- Chart Annotation
- 20 Character VFD display
- Independent case-mounted PID controllers
- User Configuration
- PC Card configuration/data storage
- Maths functions
- Totalizers, Counters and Timers
- Configurable Alarms
- Modbus Communications
- Relay outputs
- Parameter Retransmission
- Transmitter PSU
The Model 394 is a clear leader in circular trending technology. combining four color printing together with annotation to produce a clear and easy to read chart. The 394 can monitor up to 6 simultaneous inputs.
The recorder is fully configurable from the front panel or via the optional PC card reader.
Up to two independent controllers can be added enabling the 394 to control, as well as record the process. Communications makes the 394 a very flexible component in a systems or network environment.
The 394 status display consists of a 20-character vacuum fluorescent display and alarm indicators.
Two independent controllers (Eurotherm Type 2216) can be case mounted to provide PID control of related process variables.
The recorder is fully configurable from the front panel using pushbutton keys to follow a series of text prompts at the display. Access to most functions can be password protected. The recorder can also be configured from a PC based package, allowing the user to set up the configuration off-site for later downloading to the recorder.
The communications option uses the Modbus RTU protocol to ensure compatibility with standard SCADA software and other types of industrial equipment. The RS485 specification allows multiple instruments on a single communications link.
Using the computer industry standard type 1 SRAM PC-card, the recorder’s configuration can be stored for transfer to another recorder or to a PC for manipulation using the PC configuration tool.
Process data can also be stored on the PC-card in a format readable by standard spreadsheet packages, or, alternatively in a compressed format that can be used with the Eurotherm Review Software package. For viewing and printing charts.
Math’s, Timers, Counters and Totalizers
These options provide the recorder with integrating and counting facilities, and the ability to carry out calculations ranging from simple arithmetic functions (e.g. subtracting one channel’s value from another) to complex application specific functions such as Mass Flow calculations.
Up to 18 relay outputs can be fitted, driven by any internal recorder event such as channel alarm, totalizer overflow, totalizer output etc.
Up to four of the input or maths channels can be output as a linearized current or voltage signal.
Transmitter Power Supply
Up to six current loops can be powered by a built-in 25 Volt dc power supply unit which is suitable for most loops. The 394 is a step forward in circular chart recording, tracing up to six signals by using printhead technology common to other successful Eurotherm Recorders Products.
Use of the very latest in Application Specific Integrated Circuit (ASIC) and Surface Mount technologies, gives the 394 input circuitry high accuracy and stability. Inputs are fully universal accepting signals from thermocouples, resistance thermometers, potentiometers and digital sources, as well as linear dc voltage and current sources.
The use of a multi-point print head provides the 394 with the ability to print text on the chart including channel values, time, date, scales and totaliser values.