ACS contsys Thermocont TS4S, Руководство пользователя

Страница: 5 / 30

ACS-CONTROL-SYSTEM GmbH l Lauterbachstr. 57 l D-84307 Eggenfelden l www.acs-controlsystem.de l info@acs-controlsystem.de
5
Customer specific special versions can be realized short-term on request, e.g.
• software adaption (menu navigation, special functions, etc.),
• changed terminal assignment resp. connector orientation,
•
design adaption of the user surface,
•
special designs for the process connection

thread connection acc. to ANSI NPT, DIN 13 or JIS

thread connection ISO 225-1 - M18x1,5, inner thread
• other process materials, e.g. Hastelloy, Titan, etc.
•
surface coating, e.g. PTFE
•
special adjustment
1 .3 System components
The device consists on the components:
•
Sensor tube, as junction point in direct contact with the applied medium.
•
Process connection, for installation into the wall of the container or of the pipeline.
• Neck tube, for decoupling of the terminal enclosure from high process temperatures.
• Terminal enclosure, rotatable by 300°, for protection of the integrated signal processing
electronic and for the electrical connection.
The components cannot be separated by the user.
1 .4 Function
1 .4 .1 Measuring principle
The detection of the process temperature is made by the measurement of the temperature dependent
change of resistance of a precise and long term stable resistive temperature sensor Pt100 class A,
which is installed in the sensor tube.
1 .4 .2 Self-supervision function
At the self-supervising measuring system with drift monitoring and redundancy function the recording
of the Temperature is made additionally by a semiconductor temperature sensor.
Because of the parallel measurement with two physically different thermal coupled sensor elements,
the device detects impermissible drifts of a sensor and errors at the temperature measurement
automatically.
At the failure of one of the two sensor elements the temperature measurement can be also continued
with the second element, what realizes a redundancy function.
1 .4 .3 Signal processing
The temperature signal is converted by the temperature sensor into an electrical signal and processed
by the integrated evaluation electronic according to the respective preferences:
•
The measuring value is monitored by two PNP switch outputs for exceedance of limit values.
•
The measuring value is converted into a continuous current signal 4...20mA.
•
The measuring value is displayed at the robust high brightness LED display.
• Several function LED’s signal the device state.
• All settings can be changed comfortable and easy by a 3-key operation without additional
assistance with tactile feedback.
The device includes numerous functions to the adaption to nearly each measuring task:
• Adjustable measuring range down to 25% of nominal measuring span
• Integrated unit conversion °C – °K – °F
•
Peak value memory minimum – maximum
•
Error memory for fast failure analysis
•
Hysteresis or window function, time delay and working principle of the switch outputs
• Error indication function to switch output, current output and display
• Simulation of the switch outputs and the current output