4230 Flow Meter
Section 2 Programming
2-28
• If you choose NOT MEASURED, no further references
to rainfall will appear in the rest of the program.
pH measurement determines the relative acidity or alkalinity of
a solution. You must have an Isco pH Probe connected to the flow
meter through the parameter port to sense pH. pH measure-
ments range from 0 to 14 pH units, with solutions below 7 con-
sidered acidic and solutions above 7, alkaline. Pure water has a
pH of 7. The pH probe requires periodic recalibration for accurate
sensing of pH. See Section 4 (Accessories) for more information
about the pH probe. If you are not using a pH probe you would
select NOT MEASURED for this step.
• If you choose NOT MEASURED for pH, you will be
unable to activate pH later in the program.
• If you select pH, you will be unable to measure D.O.
later in the program.
• If your situation requires the measurement of both pH
and D.O. at the same time, or if you also need to
measure conductivity, use the YSI 600 Multi-Parameter
Sonde.
If you select NOT MEASURED for pH and press Enter; the fol-
lowing will appear:
Measurement of dissolved oxygen is conducted in studies of
water quality in lakes and streams. Some dissolved oxygen is
necessary for the survival of aquatic life in these waters. You
must have an Isco Dissolved Oxygen Probe to sense dissolved
oxygen. The probe attaches to the Parameter Port. PPM =
parts per million; MG/L = milligrams per liter. If you are not
using the D.O. probe, you would select NOT MEASURED for this
step.
• Selection of NOT MEASURED will keep D.O. from
appearing on subsequent programming menus.
Selection of PPM or MG/L will keep references to pH from
showing up on subsequent menus.
This step sets up measurement of the water temperature. You
must have a Temperature Probe attached to the Parameter Port.
The temperature probe contains a thermistor and needs no cali-
bration.
Measurement is in degrees Celsius or degrees Fahrenheit. If you
are not using the temperature probe, you would select NOT
MEASURED for this step.
• Selection of NOT MEASURED will keep TEMPER-
ATURE from appearing later.
pH UNITS OF MEASURE
• pH • • NOT MEASURED •
D.O. UNITS
• MG/L • • PPM • • NOT MEASURED •
TEMPERATURE UNITS
• DEG F • • DEG C • • (NOT MEASURED) •
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