Hach DR 900 Manuel De L'utilisateur page 11

1. Push Options to access the option menu.
2. Select the applicable options.
Option Description
Start Timer Select a pre-set timer or set a manual timer to
make sure that the steps of an analysis are
correctly timed (e.g., reaction times or wait
times can be exactly specified). When the timer
is on, the timer icon is shown on the display.
The instrument makes an audible sound when
the time is over. Pre-set timer—Select the
applicable pre-set timer for one or more stored
procedure steps and push Start. Timer
Manual—Enter the applicable time with the
navigation keys and push Done. Default =
00:00
Favorites/User Select from the stored favorites or user
Programs programs list. Refer to
user program
information.
All Programs Select a pre-programmed method from the list.
Data Log Show all saved readings. Refer to
on page 13 for more information.
Add to Favorites Save stored programs and user programs
methods which are often used in the favorites
list. Refer to
on page 13.
Select a favorite or a
on page 13 for more
Data log
Add a program to favorites
Option Description
%T/Abs/Conc Switch to % transmittance, absorbance or
concentration readings. Transmittance
reading (%)—Reads the percent of the original
light that passes through the sample and
reaches the detector. Absorbance readings—
The light absorbed by the sample is read in
absorbance units. Concentration readings—
The measured absorbance values are
converted into concentration values with the
program-specific stored equation.
Advanced Use the advanced options to specify more
Options parameters. Refer to
options
Save Save the last reading manually when the auto
save option is set to Off.
6.1.3 Select advanced program options
Every program has various additional advanced options from which to
select.
1. Push Options to access Options>Advanced Options.
2. Use the advanced options to specify more parameters.
Option Description
Auto Save Toggle between On and Off. Every reading is
automatically saved when the option is set to On.
The reading can be saved manually when the
option is set to Off.
Chemical Select the alternate chemical form and the
Form associated measuring range on some factory-
installed methods.
Select advanced program
on page 11.
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