Manual

The BLANK TUBE is a test tube filled only with the water being tested only. It

is important to use the actual water to be tested to provide a true comparison

for the test results.

The term 'SAMPLE TUBE' is used to describe the tube containing the water

sample to which the reagents have been added in accordance with the

appropriate test instructions. This tube is used to take the photometer

reading.

Light Cap

A light cap is provided with the photometer. This cap fits over the test

chamber and prevents stray light reaching the photodiode.

It is NOT necessary to use the light cap when using the photometer indoors or

under shaded outdoor light. The light cap should be used when working outside

in strong sunlight. The light cap is also recommended when carrying out

turbidity-based tests such as the cyanuric acid test, under bright or variable

lighting conditions. Test instructions indicate when the light cap should be used.

Getting the Best Results

Success in obtaining accurate and consistent test results will depend on the

care with which test procedures are carried out. Always follow the test

instructions carefully and observe the stated standing periods and

temperature conditions where applicable.

Wipe test tubes free from condensation before placing in the photometer.

Test tubes should always be kept in a clean condition. Wash and dry the test

tubes carefully after use. Dirty tubes may be soaked in a mild detergent

solution if necessary. Tubes which become stained or scratched should be

discarded and replaced.

Taking Test Readings

Press key. The instrument displays the ‘Choose a Test’ menu box, with the

last test program used highlighted as the active line.

The cursor will flash on the [OK] symbol of the ‘options menu' at the bottom

of the screen. Press [OK] to accept this program.

To choose a different test program, either use the  and  keys to scroll

through the menu options, or use the numeric keys to enter the Phot number

of the desired test. The four most recently used tests are listed at the top of

the ‘Choose a Test’ screen for convenience. Press [OK] to accept the selected

program.