15
OPERATING MODE
5.4. METHODS
The HI801 iris spectrophotometer can run two different types of methods; factory methods and user methods.
Factory methods were developed by Hanna Instruments. These methods are pre-programmed with all of the information needed
to run an analysis. These methods are calibrated for the selected wavelength, vial type and reagent set, see page 37 for more
information.
User methods are developed by the user. These methods can be customized based on the analysis. Options include multiple
wavelengths, vial type, reaction timers, calibration curves, etc. For additional information for creating new user methods, see
page 39. For additional information about modifying a user method, see page 28.
Factory and User Methods can be tagged as Favorite Methods, if enabled, see page 17 for more information. Favorite Methods are
easily accessible from the main screen by pressing the key.
5.5. TIMERS
Each method requires a different measurement procedure.
If a timer or timers is used during the measurement procedure the key will be visible on the main screen with the TIMER tag
above it.
Press the key to access the timer menu. Press the START key to start Timer 1, the display will show the countdown. To stop
and reset the timer, press the STOP key.
If the method requires more than one timer. Press the key to access the timer menu and press the key to select Timer 2 to
Timer 5.
When the timer has expired press the ZERO or READ key to continue. If the timer beeper is enabled a long beep will be heard when
the timer reached "00:00", see page 18 for more information.
Note: A zero measurement must be done before a read measurement. Follow the instructions in the method procedure for
preparation of the zero cuvette.
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