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3-46 TTi
®
Colorimeter User’s Manual
Part 3 Colorimeter Operation
• enter test information and calibration curve data pairs into the user-developed test file located in the PC App
Procedure
1. Open the TTi
®
Colorimeter Series PC App
and click on Add in the User-Developed Tests
section.
(Note: If this is your first User-Developed Test,
click on “Test 1” and then click Edit. )
2. The User-Developed Test File/Add New Test
screen will be displayed.
3. Enter all test information and calibration curve data pairs. NOTE: Calibration curve data pairs must
be entered in a particular order in the table. Begin at the left with the results from the lowest
concentration standard (Standard #1) and move through each succeeding increment, entering the
results from the highest concentration standard last.
User-Developed Test File Fields Description
Test Name Any English name can be entered (number of characters may be limited).
Subscripts cannot be entered. Colorimeter display will show exactly what is typed.
Chemical Form Any chemical form, name, acronym, or abbreviation can be entered (number of
characters is limited). An underscore is used to prefix a subscript ; e.g., H_2O will
be displayed on the screen as H
2
O. Superscripts cannot be entered.
Units Units in which test results will be expressed. Choices are ppm, ppb, ppt, mg/L,
µg/L, g/L, and no units.
Sample Cell Viewdepth The sample cell viewdepth that will be used for the test. Choices are 15 and 25 mm
for the TTi 2000 and TTi 3000 models.
Wavelength The wavelength that will be used for the test. Choices are 420, 470, 520, 570,
620, and 660 nm for the TTi 2000 and TTi 3000 models.
Resolution The number of decimal places used to display test results. Choices are 0, 0.0,
0.00, and 0.000.
Timers (Wait Time #1, #2, #3, #4) The wait time in minutes and seconds (up to four timers can be preprogrammed
for the test).
Calibration Curve Data Pairs Absorbance (ABS) and Concentration data pairs used to prepare the calibration
curve. Absorbance values can be entered in the table in increasing or decreasing
order but must be sequential and cannot exceed 2.5 ABS. Concentration values
must be entered in the table in increasing order (from lowest concentration
standard to highest concentration standard, moving left to right) and cannot
exceed 9999.