Thermo Scientific AQUAfast AQ3700, User Manual

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Thermo Scientific Orion AQUAfast AQ3700 Colorimeter User Guide
2.3.5 Performing Tests
When zero calibration is complete, remove the vial from the sample chamber and perform
the tests as described under “Method“.
When the results have been displayed:
- with some methods you can change between different chemical species
- you can store and/or print out the results
- perform further analysis with the same zero
- select a new method
2.3.6 Ensuring reaction periods (countdown)
To ensure compliance with reaction periods a time delay is incorporated: the countdown.
There are two kinds of countdowns:
• Press [ ] key.
Prepare water sample, start countdown with [ ] key and
proceed as described in the mode description.
The vial must not be placed in the sample chamber.
• Press [TEST] key.
Prepare the water sample as described in the method
description and place the vial in the sample chamber.
The display shows the countdown by pressing the [TEST]
key and the countdown is started automatically. After
the reaction period is finished the measurement starts
automatically.
Notes:
1. It is possible to finish the working countdown by pressing the [ ] key. Reading starts
immediately. In this case the operator is responsible for ensuring the necessary reaction
period.
Non-compliance with reaction periods leads to incorrect test results.
2. The time remaining is displayed continuously.
The beeper indicates the last 10 seconds.
Countdown
1:59
Countdown
2:00
start:
Test