Teledyne 4220, Installation And Operation Manual, Page: 118 / 198

4220 Flow Meter
Section 5 Options and Accessories
5-10
other end of the cable has 3 stripped wires. Attach them to the
alarm box according to the instructions in the alarm box
instruction manual.
5.7 Parameter Sensing
with Isco 4200 Series
Flow Meters
The Isco 4220 Flow Meter has the capability of displaying,
recording and (if Flowlink software is used) storing data provided
from parameter sensors. The parameter sensors available for the
4220 Flow Meter are for
temperature, dissolved oxygen
(DO), pH, (concerned with the acidity or alkalinity of a solution),
and the YSI 600 Multi-Parameter Sonde. See Section 2 for
information on the YSI 600 Sonde. This section covers the Isco
pH, D.O., and temperature sensors.
5.7.1 Installation of
Parameter Probes
The parameter probes, as well as other Isco probes such as the
submerged probe and area-velocity probe, require complete, con-
tinuous submersion in the flow stream for proper operation. Dry
operation can damage the pH and D.O. probes. The YSI Sonde
(only) may be suspended vertically in the stream. Teledyne Isco
offers a series of rings that provide mounting for the probes in
round pipes.
• Each probe snap-mounts to a specialized sensor carrier.
• The sensor carrier then attaches to the rings or
mounting straps.
• The probe cable is carefully routed out of the stream.
• Only the temperature probe can connect directly to the
flow meter's parameter probe connector.
• The pH and D.O. probes both connect to parameter
modules (amplifiers). The pH probe connects to the 201
pH Module and the D.O. probe connects to the 270 D.O.
Module. The modules are not interchangeable.
Note
The 270 D.O. module is no longer available from Teledyne
Isco.
Note
Isco flow meters are built with one parameter sensing port, and
can only sense temperature plus one parameter at a time,
(unless you use the YSI Sonde.) You must select temperature,
D.O. with temperature, or pH with temperature. If you want to
change probes later, you can, but you will need to reprogram
the flow meter. Note that selection of either pH or D.O. in step
1 (where
units of measure are defined) will lock out any men-
tion of the other in the menus for the rest of the program.
B
LACK
+12 VDC
G
REEN
–12 VDC
W
HITE
DATA