Ysi 52 Manuel d'utilisateur télécharger pdf (Page 7)

SECTION 2 PREPARING THE METER

To prepare the meter for use, connect a prepared probe to the meter. Set the function

switch to O

-TEMP. Observe temperature and oxygen readings for stability, or 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. If you have a problem you cannot resolve, call YSI Technical Support,

(937) 767-7241 or (800) 765-4974.

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.

6.33 mg/L 19.9C

88.1

11: 52

When the temperature and oxygen readings have stabilized, you are ready to begin

calibration.

YSI, Incorporated Model 52 3

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Ysi 52 Manuel d'utilisateur Page 7