YSI ProDSS Manual page 3

Select your Site
:
System
a) Select the
Logging [single]
highlight
down arrow.
indicates which feature is highlighted.)
Select this feature by hitting Enter.
b) Before selecting a site, make sure the
Use Site List
check box has been
selected and
Continuous Mode
not, highlight rows and hit Enter as
needed for the screen to look like this:
c) Highlight the line with
Enter.
d) You will see a list of sites. Scroll down
until you find your site name, and hit
Enter. If you can't find your site, select
"test" and note on your field sheet the
site and time.
e) The green bar should read
site].
Hit Enter, then hit Escape twice.
This will return you to the Run screen.
SAMPLING:
Let the unit soak in the stream for 5-10
1.
m inutes,
in a place where it's safe and
won't get fouled by bottom sediment. If
you can put it at the sampling point, all the
better—see below.
P lace the probe at the sam pling point:
2.
Standing downstream or to the side of the
probe, place it in the main current, in a
place with steady flow, adequate depth,
good mixing, and no surface turbulence.
Do not sam ple dow nstream of w here
your team has disturbed the bottom .
Field Procedures
button , then
by using the
(Note: the green band
Use Data ID List
and
are not selected. If
Site[XXXYYY]
Select [your
Sample at mid-depth, or 8-12" below the
surface if the water is deep. You may dangle
the probe or place it on clean rocks at the
bottom if the stream is shallow.
im m erse the probe at least halfw ay up
the guard.
to dislodge any bubbles at the probe tips.
The goal is always to get a representative,
well-mixed portion of the stream. Here are
some alternative sampling methods:
• Hold the probe out in the stream with a
wand and a float of some kind (an empty
bottle or piece of wood), at mid-column or
8-12" under (whichever is shallower).
• If there's too much current to hold the
probe at the end of the wand out in the fast
water, you can wade out into the faster part
of the water column (if it's safe) and hold
the probe pointing straight down into the
water with the wand.
• In extremely low water, here are a few
possibilities:
o Pull some of the rocks out of the middle
. Hit
of the creek, or build up rocks on the
sides, to create a little chute to deploy
the probe in.
o Build a little rock dam and deploy the
probe in the pool it creates. Leave
enough time to let the disturbed
sediment settle out.
o Collect water in the tub included in the
field kit's dirty bag (you might have to
use something as a scoop) and do the
measurements in there. if possible, sit
the bucket down in the stream to keep it
cool. Change out the water after you've
let the probe pre-soak in the first batch
for a few minutes.
Stabilize and log readings:
3.
Turn on the Auto Stable feature:
a) Hit the
Auto Stable.
b) Confirm settings:
3
Agitate the probe under water
Probe button
, then select
18
YSI ProDSS
You m ust
th
Edition, 2016