TS21 Tank-System

The tank system consits of a cylindrical tank and a pump which are mounted on top of a rectangular container. The pump driven by a DC motor sucks distilled water out of the container and supplies the cylindrical tank. On its base there is a manual valve as nominal outflow allowing the liquid to flow continuously back into the container. This closes the cycle. Using a second manual valve an additional opening in the cylindrical tank can be opened. The level of the liquid is measured by a process pressure transmitter. The container and the cylindrical tank build one unit and are made of plexiglass. The model and the accompanying actuator are connected by a 6-polar plug.

• Width : 565 mm
• Height : 815 mm
• Depth : 360 mm
• Weight : 19 kg

Pumps:

• Type : Diaphragm pump
• Supply voltage : 12 V
• Input current : 1.4 A
• Maximum flow: : 7 l/min
• Pressure : 1.4 bar

Sensor:

• Range : 0 ... 100 mbar
• Output signal : 0 ... 20 mA (two-wire)
  

Actuator with signal adaption unit and analog controller

Inputs servo amplifier:

• Control signal for the pump: 0..10 V

Output servo amplifier:

• Output voltage for the pump: +12 V (PWM)

Inputs signal adaption unit :

• 3 sensor signals, range: 0 ... 20 mA
• 2 control signals for the pumps in the range: -10 ... +10 V

Outputs of the signal adaption unit :

• Liquid level of the cylinder: +10..-10 V for external controller
• Control signal for the pump: 0..10 V
  

Analog controller:
Two setpoints for the height are adjustable by potentiometers. Switching from one setpoint to the
other produces step responses. Proportional and integral portion are adjustable by a ten turn
potentiometer with precision knob. The integral portion can be switched off. The controller can be
linearized about the operating point by using a feed forward signal for the servo amplifier. The feed
forward signal can be adjusted by a potentiometer. All operating elements (switches and potentiometers) and the sockets for the measurement outputs are placed on the front panel together with a clearly visible block diagram.

Measurement outputs on the front panel:

• Setpoint 1 for the height: 0..6 V
• Setpoint 2 for the height: 0..6 V
• Actual height: 0..6 V
• Feed forward signal: 0..10 V
• Control signal for servo: 0..10 V

External digital controller (Option 21-02USB or DAC)
As external controller a PC with USB interface or PC with PCIe slot and an A/D-D/A plug-in card
can be used. The option 21-02 DAC contains this card together with the connection cable to the
actuator. Both options (21-02USB and 21-02DAC) contain an executable controller program running with WINDOWS (for WINDOWS 7-10).

Inputs :

• Sensor signals: -10...+10 V to 12 bit A/D converter for USB, 14 Bit for DAC

Outputs :

• Control signals for pump servo: -10...+10 V from12 bit D/A conv. for USB, 14 bit for DAC

Program C-source (Option 21-03)
The controller program from option 21-02USB or DAC in C++ source with library functions for graphic output, controlling the sampling period as well as controlling the USB interface and the PC adapter card requires the Embarcadero C++ Builder V10.

Technical data are subject to change (Date 4-December-2017)