Teledyne 4220 installation and operation guide Returning to the YSI menu, if you select D.O

4220 Flow Meter

Section 2 Programming

If you select pH for the parameter to calibrate, the following display will appear:

YSI 600 pH CALIBRATION

• pH 4 & 7 • • pH 7 & 10 • • pH 4, 7, & 10 •

You can perform a two- or three-point calibration for pH with the YSI sonde. The menus that follow are similar to those in the pre- ceding section for the Isco pH sensor. Select the calibration that best suits your stream’s profile. When you complete the pH cali- bration successfully, the following display will appear:

CALIBRATING...

PRESS ENTER TO CONTINUE

Returning to the YSI menu, if you select D.O:.

YSI 600 DISSOLVED OXYGEN CALIBRATION

• D.O. STANDARD• •ABS BAROMETRIC PRESSURE •>

ALTITUDE is just off screen to the right. Programming for YSI 600 D.O. is essentially the same as that described for the Isco D.O. sensor on the preceding section, with the exception that you always place the sensor in a cup, rather than wrap a moist cloth around it as is done for the Isco D. O. sensor.

If you select CONDUCTIVITY for the parameter to calibrate, the following display will appear:

CONDUCTIVITY CALIBRATION UNITS

• MS/CM • • PPT •

MS/CM is milli-siemens per centimeter. The siemen is the S.I. (Système Internationale) name for the unit of conductance, which is also the reciprocal of the ohm. The siemen was formerly called the mho (ohm spelled backwards), and that term may be more familiar to some. PPT is parts per thousand. Select the standard most suitable for your application.

CONDUCTIVITY STANDARD

X.XX MS/CM

Then:

PLACE PROBE IN X.XX MS/CM

PRESS ENTER WHEN STABLE: X.XX MS/CM

Then:

CALIBRATING...

PLEASE WAIT...

If you select PPT for the conductivity standard:

CONDUCTIVITY STANDARD

X.XX PPT

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