ORBECO SP600, Instruction Manual, Page: 275 / 334

273
SP600 Spectrophotometer 01/2008
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:
- at 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)
For the compliance with reaction periods there is incorporated a time delay,
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.
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 by himself.
Non-compliance with reaction periods lead 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