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2.5 Supplying Sample
Note: Make sure the pressure plate
is securely attached to avoid
backflow of the sample into
the reagents.
2.6 Supplying Power
2.7 Instrument Menu Structure
2.7.1 Setup Menu
Note: A properly maintained
instrument in good working
condition will read within the
accuracy specifications presented in
Specifications on page
6. The
calibration function should never be
used to force an analyzer that is not
working correctly to display a correct
reading. Calibrations are intended
for very small adjustments only.
54400_start.fm
Start sample flow through the instrument by opening the supply valve (item 19
in
Figure 6 on page
19). Allow the pressure in the tubing to stabilize and
check for leaks.
Until the surface of the sample cell becomes completely wetted, bubbles may
cling to the sample cell and cause erratic readings. This condition is
temporary. Its duration depends on the sample properties.
The power switch is located inside the enclosure door in the recessed area to
the left of the colorimeter block. Set the POWER (–/O) switch to ON (–) and
allow the analyzer to operate for approximately two hours to ensure the
system is completely wetted with reagents and sample.
The major menus in the CL17 Analyzer consist of
and
. Press the
or
SETUP
UP
sections below give information on the functions of each of the menus and the
submenus within them.
Day-to-day analyzer functions are accessed from the
the
menu, press the
SETUP
the
option. Press
SETUP
ENTER
Scroll through the
menu options using the
SETUP
Press
to select the displayed menu option. Arrow icons are displayed if
ENTER
the display is editable. Press the
. The menu information below is presented in the order it appears in the
SETUP
menu.
SETUP
•
SIGAVG—The SIGAVG feature is used to average readings and prevent
erratic recorder output signals. Press
keys to select 1, 2, 3, or 4, then press
ARROW
displayed selection. Depending on the value selected, the last 1, 2, or 3
measurements are averages and the reported concentration is the
averaged values. Option 4 is a special filter, which only reports the
maximum value between the current reading and the last. This feature
reduces negative spikes due to bubbles and other abnormalities in the
sample. The factory default is 1. Press
•
CAL ZERO—this feature is used to offset the instrument zero using a
prepared zero standard. If the offset is too large, a marginal zero (MARG
Z) warning will occur. See
•
CAL STD—This feature is used to adjust the analyzer slope using a
prepared standard. If the adjustment is too large, the analyzer will not
accept it and a marginal gain (MARG G) warning will occur. The new
standard will not be accepted and it will have to be checked again using
another method to establish a more exact reading. See
page
40.
ALARMS
keys to access the menus. The
DOWN ARROW
key, then use the
MENU
UP ARROW
.
and
UP
key to back out of a menu and return to
EXIT
, use the
ENTER
ENTER
to return to the
EXIT
Calibration on page
40.
Section 2
,
,
,
RECRDR
MAINT
menu. To enter
SETUP
key to scroll to
keys.
DOWN ARROW
and
UP
DOWN
to accept the
menu.
SETUP
Calibration on
Page 35
Supplying Sample
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