Teledyne 4220, Installation And Operation Manual, Page: 64 / 198

4220 Flow Meter
Section 2 Programming
2-36
current range is selected). The flow meter will then request that
you repeat the process of defining the data type and setting the
minimum and maximum values for any of the other analog ports
you activated previously in
Setup .
2.4.5 Step 3 - Parameter to
Adjust
This step lets you enter the measured level in the flow stream. It
also lets you calibrate the pH (acidity or alkalinity), D.O. (dis-
solved oxygen) parameter sensors, and the YSI 600 Multiple
Parameter Sonde. Note that there is no calibration step for the
temperature sensor because it doesn’t need calibration. When
you select
step 3 the following will appear:
LEVEL will not show up if you are using the flow meter only for
parameter sensing. Likewise, pH and/or D. O. and YSI 600 will
not show up on the display if you have locked them out by pro-
gramming selections you made in
step 1 .
Remember that selection of either pH or D. O. in step 1 will keep
the other from appearing on the display in this or subsequent
programming steps. If the parameter you want does not appear
in this menu, exit the program and return to
Setup . Check to see
that you have not accidentally locked your choice out with selec-
tions you made in the early section of the program. If you select
NONE, the flow meter will advance to the next step. If you select
LEVEL, the following will appear:
First measure the level in the flow stream. This is usually done
with either a measuring stick, or you read the level from a scale
that may be painted or printed on the side of the primary mea-
suring device.
Figure 2-2 Measuring Level in Round Pipes
Note
It is very important to enter accurate measurements for both
the level in the stream and the dimension(s) of the channel, as
all calculations of flow will be based on these measurements. If
the values entered are incorrect, even by relatively small
amounts, all subsequent flow calculations will also be incor-
rect. For example, an error of only
1 ⁄
4
" for a 3" level and
1 ⁄
4
" for
a 10" diameter round pipe can result in a combined error of
PARAMETER TO ADJUST
• NONE • • (LEVEL) • • (pH) • • (D. O.) • • (YSI 600) •
ENTER CURRENT LEVEL
X.XXX FEET (or meters)
D
d
h
D – d = h (level)
This picture shows you how
to measure level. You then
enter this value with the
number keys. Note that
LEVEL ADJUST
must be
done at the job site, while
most other programming
can be done in the shop.