Thermo Scientific Orion 310, Instruction Manual

Page: 29 / 81

25
PerpHecT ® Orion 310, 320, 330 Instruction Manual
C. SETUP Mode for Orion 320
Select SETUP mode by pressing SETUP key until SETUP light is
activated. This mode is used to define, change or view meter operating
parameters. While in the SETUP mode, the YES key is used to scroll
through the menu without changing parameters and to enter new
parameters into meter memory. The SCROLL (
▲
,
▼
) keys are used to
change the settings within each function. To exit the SETUP mode,
press the MODE key at any time.
NOTE:
If a parameter has been changed, the YES
key must be pressed to activate change.
The following parameters can be accessed in the SETUP mode:
Slope
The current pH electrode slope in 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 SLOPE during a one-point pH calibration. Press
the YES key to advance to next menu function.
LogR
When the LogR function is accessed, the LogR annunciator will light up
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.
Using the Orion 320