In-Situ TROLL 9500 Operators Manual - Manual (Page 39)

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0095110 rev. 007 01/09 TROLL 9500 Operator’s Manual
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Profiler cycles through the available channels in turn.
s
reading.
TIP: You can use the Setup option to change the Profiler’s
reading rate and/or the displayed units. See
Customizing the
Profiler later in this section for details.
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read, usually because there is no sensor installed in the port.
TIP: If a channel you wish to see is not displayed, click the
symbol below a reading you can do without and select the
channel you want to add from the list of available channels.
This is particularly useful for RDO readings.
GRAPHING PROFILER DATA
To see a graph of any channel during the current Profiler session, do
one of the following:
s
s
Readings for the selected channel since the start of profiling will be
displayed in graphical format.
The profiler can graph up to 300 readings. A range slider (scroll bar)
on the right side of the graph allows you to change the range of visible
data. Like the channel display, the graph will be continuously updated.
A range slider at the bottom of the graph lets you zoom in on a nar-
rower time period.
To switch back to the display of active channels, click Meter.
PROFILING DISSOLVED OXYGEN
The ability of the polarographic D.O. sensor to respond to a change
in the dissolved oxygen content of the medium—for the sensor to ac-
curately “see” a change—varies with the membrane thickness.
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DO changes;
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cant DO changes.
The RDO Optical D.O. sensor has a response time of T(90) = 30 sec
and T(95) = 37.
PROFILING PRESSURE OR DEPTH
Profiler readings from a pressure channel are displayed as pressure
head or depth according to the pressure channel setup. Refer to Sec-
tion 7 below for pressure display and conversion options. Level mode
readings with a user-entered reference are primarily for use in aquifer
tests.
TIP: Profiling with the MP TROLL’s default pressure settings
(no channel setup) will display pressure head in psi (pounds
per square inch). To display depth, edit the pressure channel
as described in Section 7.
PROFILING TURBIDITY
The turbidity sensor requires a 5-second warmup before the first read-
ing. Subsequent readings do not require a warmup.
If a turbidity wiper accessory is installed in the TROLL 9500, it
performs an initial wipe of the sensor optics—this takes about 15
seconds—then displays the first turbidity reading. If the profiling rate
is longer than 15 seconds, this 15 second wipe will happen before
each reading. To avoid this delay, set the profiling rate to less than 15
seconds. See
Customizing the Profiler later in this section for details.
Section 18 below has additional information on the turbidity wiper.
SECTION 5: PROFILING
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