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2.5 Meter Connections
Input
Function
Power
Universal power supply
GND
Ground
Export
Connection to printer or computer
MiniDIN
Connection to dissolved oxygen electrode
2.6 Electrode Information
The Orion Lab Star DO113 dissolved oxygen meter is
compatible with polarographic dissolved oxygen electrodes
with a MiniDIN connector. The Orion Lab Star DO113
dissolved oxygen meter can be purchased in a meter only
configuration (purchase electrode separately) or kitted with
a dissolved oxygen electrode.
Refer to the electrode instructions for specific care and
maintenance procedures. The following are general
recommendations for electrode preparation.
Remove the packaging from the electrode and save
for storage.
Unscrew the membrane cap from the electrode.
Rinse the inside and outside of the cap with distilled
or deionized water and blot dry.
Rinse the anode/cathode of the electrode with
distilled or deionized water and blot dry.
Fill the membrane cap about ¾ full with fresh
polarographic electrolyte solution.
Screw the membrane cap onto the electrode until
the cap is hand-tight.
Polarize the dissolved oxygen electrode. The
electrode must be polarized before use.
To polarize a new electrode, attach the electrode to
the meter, connect the meter to a power supply,
and wait 30 to 60 minutes.
The electrode is continuously polarized when it is
connected to the meter, so this process does not
need to be repeated unless electrode maintenance
is performed or the electrode is disconnected from
the meter for more than an hour.
If the electrode is disconnected from the meter for
less than an hour, allow the electrode to polarize for
5 to 25 minutes before use.
Rinse the electrode using distilled water.
2.7 Meter Startup
Sequence
When the meter is powered on, it displays a set of startup
screens, starting with all segments lit screen, followed by
the meter info screen and then the meter self-test screen.
The meter info screen shows the meter model number and
current software revision.
After the meter info screen, the meter performs a series of
internal self-tests to verify that the meter is operating
correctly and then the self-test results are shown.
Finally, the meter proceeds to the main measure mode.
Orion Lab Star DO113 Dissolved Oxygen Meter
11
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