12
In biosensor modules, the immobilized enzyme membranes are
mounted on O-rings which act as fluid seals.
In ISE modules, an O-ring is positioned inside a sleeve on the end of
the electrode.
A reference or auxiliary electrode is housed in the temperature probe
and positioned at the back of the Sample module.
Stir Bars
(not shown)
They are plastic encapsulated magnets. They are activated by
motors housed below the sample modules. They provide thorough
mixing inside the sample modules.
Buffer, Waste and
Calibrator Bottles
Are conveniently located for maintenance.
Fluid levels are monitored by sensors.
Operation is automatically halted when the Buffer or Calibrator
Bottles are empty, or when the Waste bottles are full.
Rear Panel
Figure 3.5
Power Switch
The main power switch is an on/off rocker switch (0-off and I-on)
located on the back of the instrument
Fuse Holder
The fuse holder houses the power line fuse and opens up for fuse
replacement.
Power Receptacle
One end of the power cord (supplied) plugs into this receptacle,
while the other end plugs into a properly grounded electrical outlet.
The instrument will automatically adjust the voltage as needed.
Ethernet Port
It allows connection to a network or router via a RJ45 Ethernet port.
RS232 Serial Port
The RS232 connection is a standard DB9F connector. It is used to
interface with the YSI 2901 Printer or a remote host.
4. Basic Setup
The following list describes the basic steps necessary for sampling with the 2900 Series.
1. Install Bottle Racks
2. Connect Printer (optional)
3. Connect AC Power
Power
Receptacle
RS232 Port
Power Switch
Fuse
Holder
Ethernet Port
USB Port
