YSI BOD Analyst Pro - Manual (Page 86)

YSI BOD Analyst Pro ® User Manual 86
10.4 THE GENERAL SETTINGS FORM
The General Settings form is used for a variety of BOD Analyst Pro settings that are not
considered measurement criteria per se. Access the form from main menu using Setup / General.
The form is divided into three fields. Each setting and the options are discussed below.
Normalization Factors
Normalization factors allow you to set the days for your Final DOs readings.
The program multiplies all depletions by the normalization factor for the day of the Final DO.
You enter the values as pairs. Default values appear in the BOD Analyst Pro program initially.
For the typical 5-day BOD, enter the pair (5, 1.00).
If you perform 20-day or 7-day BODs, enter either (20, 1.00) or (7, 1.00).
Up to 20 pairs can be entered, with days ranging 1 to 99, and factors ranging 0.00 to 2.00.
You can estimate a 5-day BOD from Finals read a day early or late.
For Day 4 enter (4, 1.13)
For Day 6 enter (6, 0.91)
Derive Initials
You do not need to measure Initial DOs for every dilution. The program can derive the initial DO
of a dilution based on the Initial DOs of other dilutions of the same sample, the Initial DO of the
blank, and the Initial DO of any seed or spike that may be present. If you want to use this feature,
check the Derive Initials box on the form.
There are a few rules and suggestions if you choose this option.
When you are reading Initials use Skip command to get leave the dilutions that you want the
program to derive.
You must measure at least one dilution for each Sample.
It is best to measure the strongest sample (weakest dilution).
If you measure more than one dilution for a Sample, the program will use a weighted average of