Multichannel Systems PPS2 Manual - Manual (Page 10)

Peristaltic Pump Manual
8
Bubble Detector
The bubble detector connected to the outlet detects the amount of bubbles in the outlet tube.
A low number of bubbles can indicate that the perfusion outlet cycle is not working properly,
so the bubble detector can be used as an alarm system to prevent flooding of the recording
equipment.
The sensor of the bubble detector is on the left side of the LED, the short Pharmed ® BPT tube
has to be guided through the bubble detector as shown on the picture. The LED indicates the
fluid flow: The LED is constantly on without tube, when the fluid flow is not correct it flashes
fast, with correct flow the LED flashes slow. Please pay attention to the LED. See also chapter
“Software”.
Rear Panel
1. Connect the PPS2 pump with the provided power supply cable to the power supply.
2. Connect the PPS2 pump with an USB cable (type A – B) to an USB 2.0 port.
3. If necessary, connect the ground connector to the ground of your recording system.
4. Use the “I/O” switch to switch the PPS2 on and off.
As additional means to control the PPS2, inputs for analog or digital (TTL) signals are provided.
These inputs can be used to start / stop the pump and control the pump speed by external
signals.
It is possible to connect several PPS2 devices via USB hub to one computer to be controlled
by the same software. In future versions the MCS Bus interface can be used to connect several
PPS2 devices in series, also controlled by the same software application.