Thermo Scientific Orion 320, Руководство пользователя

Страница: 13 / 67

Thermo Scientific Orion 320, 350 and 370 PerpHecT
®
LogR
®
Meter User Guide
3-1
Chapter 3
Operating the 320 Meter
Plug the meter into an approved wall outlet via the power line adaptor . The
entire display (all icons) will be lit for about two seconds . Once all power
up procedures have been completed, the meter automatically advances to the
measurement mode .
Note:
The first time the meter is powered up, a meter self-test and check
out should be performed before using the meter for measurements . Refer to
Chapter .7, .Meter .Self .Test for instructions .
Select the setup menu by pressing the setup key until the setup icon on
the display is activated . This menu is used to define, change or view meter
operating parameters . While in the setup menu, the yes key is used to scroll
through the menu without changing parameters and to enter new parameters
into meter memory . If a parameter has been changed, the yes key must be
pressed to activate the change . The scroll (
▲ ▼
) keys are used to change the
settings within each function . To exit the setup menu, press the mode key .
Slope .– The current pH electrode slope in the meter memory will be
displayed . The value is displayed as a percent of theoretical slope . The
default setting is 100% . This function is for display purposes only . The value
cannot be changed in the setup menu . To change the slope value, perform
a two point calibration or set the slope during a one point calibration . Press
the yes key to advance to next menu function .
LogR .– When the LogR function is accessed, the LogR icon will be shown
while the upper readout displays the current LogR setting (off for disabled
and on for enabled) . Press the yes key to accept the setting . To change
the current setting, press a scroll (
▲ ▼
) key . Press the yes key to accept .
The measured LogR temperature will be used to calculate temperature-
compensated pH values .
Manual .Buffer .Option .– When the manual buffer option function is
entered, the display will show STD (57d) or SET (5E7) . To change the
setting, press a scroll (
▲ ▼
) key . Press the yes key when the desired setting
is displayed . When the STD option is selected, calibration may only be
performed with standard buffers (pH 4 .01, 7 .00 and 10 .01) . When the SET
option is selected, calibration may be performed with user-defined buffers
within the 0 to 14 pH range . If SET is selected, the meter will advance to
setting the manual buffer values . Buffer values must be at least 1 and not
more than 4 pH units apart .
Meter Power Up
Setup Menu
Setup Parameters