Teledyne 4220 - Manual (Page 36)

4220 Flow Meter
Section 2 Programming
2-8
The port is not dedicated to a particular sensor, except through
programming. You can change the sensor. For example, you can
change from a pH probe to a D.O. sensor if you change the pro-
gramming. Selection of one parameter will keep the other from
showing up on the menus. Note, however, that it is possible to
measure several different stream conditions including pH and
D.O. at the same time with the YSI 600 Sonde.
The YSI 600 Sonde
The YSI 600 Sonde is a multi-purpose water quality mea-
surement device. It is intended for use in research, assessment,
and regulatory compliance. The sonde attaches to the modified
RAIN GAUGE connector on the 4220. Flow meters having only a
4-pin rain gauge connector will not support the YSI Sonde. If you
wish to upgrade your flow meter to use this system, contact the
factory. Note that you can have both the YSI 600 Sonde and the
Rain Gauge connected to the flow meter at the same time by
using a special Y-connect cable.
The YSI 600 Sonde can measure the following water qualities:
dissolved oxygen (D.O.), conductivity, temperature, and
pH. Conductivity measurements made by the sonde can be used
to calculate specific conductivity, salinity, and total dissolved
solids. A brief description and specifications for the YSI 600 are
printed in Section 5. You may also contact the factory or your
Teledyne Isco representative. More information on the sonde is
found in the YSI 600 Manual, shipped with each YSI 600 Sonde.
Figure 2-1 The YSI 600 Sonde
2.3.4 Step 4 - Reset Totalizer In this step, you decide whether to reset the flow meter's internal
flow totalizers. If the installation is permanent, you generally
won't reset the totalizer. If you are using the flow meter as a por-
table recording unit and move it from site to site, you would gen-
erally reset the totalizer between sites.
2.3.5 Step 5 - Sampler
Pacing
It is common to use a flow meter with an Isco Automatic Waste-
water Sampler. Typically the flow meter signals the sampler to
take a sample after a certain volume has passed. It might also
occur after a certain condition or set of conditions has either
changed or been met. This step allows you to determine that
Assembled Sonde
Conductivity (inside)
D.O. sensor
pH glass sensor
pH reference
Temperature (Cover Removed)