Thermo Scientific AQUAfast AQ3700, User Manual

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3 Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
1.1 Methods
Oxygen LR, dissolved
with Ampoule
10 – 800 μg/l O
2
Insert the adapter for 13 mm Ø round vials.
1. Place the blank in the sample chamber. The blank is part
of the test kit.
2. Press ZERO key.
3. Remove the blank from the sample chamber.
4. Water should flow through the special sample container
for several minutes to remove any air bubbles sticking
at the surface.
The water must flow from the bottom to the top.
5. When the sample container is bubble-free press one
ampoule into the lower edge of the sample container.
The ampoule breaks at the neck and the vial fills auto-
matically.
A small volume of inert gas remains in the ampoule.
6. Remove the ampoule point downwards from the sample
container immediately.
As the contents of the vial has a higher density than
water, it is important to remove the vial from the sample
container within 5 seconds to prevent any loss of rea-
gent.
7. The ampoule is closed with one finger (covered with
a glove) to prevent entry of air. Invert the vial several
times. Dry the outside of the vial.
8. Place the ampoule in the sample chamber.
9. Press
TEST
key.
The result is shown in the display in μg/l Oxygen.
9 2 2
prepare Zero
press ZERO
Zero accepted
prepare Test
press TEST