YSI 6000UPG - Manual (Page 165)

H-1
APPENDIX H
TURBIDITY MEASUREMENTS WITH THE 6000
UPG
A QUESTION/ANSWER GUIDE TO HELP YOU OPTIMIZE PERFORMANCE
AND TROUBLE SHOOT PROBLEMS.
Introduction
The turbidity system of the Model 6000 UPG is characterized by a great deal of flexibility from the
point of view of the user. For example:
❏ The mechanical wiper can be activated manually or automatically via the sonde software;
❏ The data from the turbidity sensor can be processed via a sophisticated filtering algorithm
and the extent of the filtering can be defined by the user;
❏ The turbidity system can be used in spot sampling applications with our 610-D or 610-DM
data loggers or can be used for long term unattended monitoring studies either in a stand-
alone deployment or attached to a data collection platform;
❏ A number of calibration options are offered with the 6000
UPG turbidity system.
YSI consciously designed in this versatility because we believe that these options are necessary
to produce high quality turbidity readings under the wide variety of environmental applications
likely to be encountered in water quality assessment programs. However, we also appreciate the
fact that the existence of this flexibility requires the user to make more decisions with regard to
setup, calibration, and use than for a simpler sensor such as conductivity, and that sometimes the
basis for these decisions with regard to operation can be confusing to the first-time user. This
section is designed to help the user attain the maximum possible benefit from the 6000
UPG
turbidity system by supplementing the discussion of turbidity which is provided in the other
sections of this manual (Getting Started, Basic Operation, Principles of Operation, and
Maintenance). The presentation is designed around a number of questions which may be asked
by a typical user of the 6000
UPG with our 6026 turbidity sensor. It does not deal with specific
instructions for operation of the 6000
UPG
at the level presented elsewhere in the manual.
Therefore, be sure to read the parts of these sections outlined above which deal with turbidity in
order to get the maximum benefit from this appendix.
Question 1 : Why do I need a sensor with mechanical cleaning?
You can get by without mechanical cleaning in spot sampling applications -- YSI offers such a
probe (6036) for use with our Model 6820. However, the 6000
UPG is used primarily for long
term unattended monitoring studies where the 6000 UPG is sending readings to internal memory,
a data collection platform or computer on a regular interval over a long period of time (days or
weeks). For this application, the mechanical cleaning capability of the 6026 provides very