YSI Model 52, Operation Manual

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YSI, Incorporated Model 52 3
SECTION 2 PREPARING THE METER
To prepare the meter for use, connect a prepared probe to the meter. Set the function
switch to O
2
-TEMP. Observe temperature and oxygen readings for stability, or see
section VIII.B to set up Autostable. Since complete equilibration can take as long as 15
minutes after the meter is turned on, it is customary to leave the instrument on throughout
the working day.
When the instrument is turned on, a beep signals the beginning of a Power On Self Test
(POST). A series of displays will appear. A final beep and a return to the normal display
signal the conclusion of the test. The whole process takes about 10 seconds. If the
instrument detects an error, it will display an error message. These messages, with
appropriate corrective actions, are listed in the Maintenance and Troubleshooting section
of this manual (see section X.B.). If you have a problem you cannot resolve, call YSI
Technical Support, (937) 767-7241 or (800) 765-9974.
Low Batt
Stirring: Since the oxygen level in the layer of liquid at the membrane surface is
continuously depleted, it is essential that water movement of 1 foot per second or more be
maintained while making dissolved oxygen measurements. When using the Model 52 in
field applications, a moving stream will usually provide adequate motion, as will moving
the probe through the sample by hand. For lab applications, we recommend one of the
YSI self-stirring BOD probes.
When the temperature and oxygen readings have stabilized, you are ready to begin
calibration.
6.33 mg/L 19.9C
88.1 % 11: 52