Teledyne 4250 Installation And Operation Manual page 57

GPS = gallons per second; GPM = gallons per minute; GPH =
gallons per hour; MGD = millions of gallons per day; CFS = cubic
feet per second; CFM = cubic feet per minute; CFH = cubic feet
per hour; CFD = cubic feet per day; LPS = liters per second; M3S
= cubic meters per second; M3M = cubic meters per minute; M3H
= cubic meters per hour; M3D = cubic meters per day; AFD =
acre-feet per day.
TOTALIZED VOLUME UNITS
• GAL • • MGAL • • CF • • L • • M3 • • AF •
This step determines the units value the flow meter will use to
record the totalized flow volume that passes by. GAL = gallons;
MGAL = millions of gallons; CF = cubic feet; L = liters; M3 =
cubic meters; AF = acre-feet.
VELOCITY UNITS
• FT/S • • M/S • • NOT MEASURED•
This step determines the units the flow meter uses to record
velocity. FT/S is feet per second; M/S is meters per second. If you
do not want to use this feature, you would select NOT MEA-
SURED.
For the next several substeps, you must have the appropriate
sensor attached to the flow meter's Parameter Port or Rain
Gauge Port (for the Rain Gauge or YSI 600 Sonde) to take
advantage of the capabilities. You can only have D.O./temper-
ature, pH/temperature or temperature alone on a given flow
meter, unless you use the YSI 600 Sonde. The YSI 600 Sonde pro-
vides multiple outputs simultaneously. You can use the Rain
Gauge with the YSI 600 sonde if you use a Y-connect cable.
The pH or D. O. probes do not attach directly to the flow meter, as
their output signals are very low. You must also have the appro-
priate amplifier box connected between the probes and the flow
meter.
Note
The 270 D.O. module has been discontinued. Probes, service
kits, and accessories are still available to maintain existing field
units.
Remember that programming for one type of sensor will prevent
the display of any references to the other in later program steps.
All sensors but the rain gauge are mounted fully submerged in
the flow stream. The pH and D.O. probes must be kept con-
stantly wet or they can be damaged.
Their use in streams with intermittent flow (such as storm
drainage) is not recommended. Note that the pH probe is a con-
sumable item, and will eventually need replacement in any case.
4250 Flow Meter
Section 2 Programming
2-29