12
TURBIDITY • SMART3 COLORIMETER
Absorption Method • No Reagents Required
RANGE:
0–500 FAU (Formazin Attenuation Units)
MDL:
3 FAU
METHOD:
Absorptimetric, 180° detector
SAMPLE HANDLING &
PRESERVATION:
Measure sample as soon as possible after collection.
INTERFERENCES:
Check for stray light interference.
PROCEDURE
1. Press and hold
until colorimeter turns on.
2. Press
ENTER
to select
TESTING MENU
.
3. Select
ALL TESTS
(or another sequence containing
095 Turbidity
) from
TESTING MENU
.
4. Scroll to and select
095 Turbidity
from menu.
5. Rinse a clean tube (0290) with deionized water (turbidity free). Fill to the 10
mL line with deionized water.
6. Insert tube into chamber, close lid and select
SCAN BLANK
.
7. Rinse a second clean tube (0290) with sample water. Fill to the 10 mL line
with sample. Cap tube. Wipe off excess water and
fi
ngerprints. Shake to
resuspend particulate matter. Remove all bubbles before measurement.
8. Insert tube into chamber, close lid and select
SCAN SAMPLE
. Record
result in FAU. Turbidity measurements should be taken as soon as possible
after sample has been collected.
9. Press
to turn colorimeter off or press
EXIT
to exit to a previous
menu or make another menu selection.
NOTE: FAU = NTU
NOTE: For the most accurate results, the sample should be at 25±4°C.
NOTE: If a test result using the SMART3 Colorimeter gives an over range
message then the the sample must be diluted. The test should be repeated
on a sample diluted with low turbidity water to obtain a reading which is in the
concentration range for the test. See page 26.
