Orion Star A221 and Star A321 Portable pH Meters
3
Keypad
1. Press
to power the meter on. When the meter is on, press and quickly release
to turn the
backlight on or off or press and hold
for about three seconds to power the meter off.
2. Press
to exit any meter function and return to the measurement mode.
3. The
f1
,
f2
,
and
f3
function keys perform a variety of meter operations. The menu-specific operation is
shown above each key. For example, press
f1
in the measurement mode to start a calibration.
4. The
,
,
or
keys are used as navigation keys (up, right, down, left) when selecting
from a fixed list or grid of meter options. In the measurement mode, these keys are used to access the
setup menu, change the measurement mode, manually log or print a measurement and hold (freeze) a
displayed measurement.
Press the f1, f2 and f3 function keys to perform the action shown above each key
on the display.
Press to turn the meter on.
When the meter is on, press and quickly release to turn the display backlight on or
off or hold down to turn the meter off.
In the measurement mode, press to take a measurement.
In the setup, calibration and other menus, press to escape the current menu and
return to the measurement mode.
In the measurement mode, press to enter the setup menu.
In the setup, calibration and other menus, press to scroll up through a list of options.
In the continuous measurement mode, press to freeze the displayed measurement and
press again to unfreeze the measurement.
In the setup, calibration and other menus, press to scroll left through a list of options.
In the measurement mode, press to change the displayed measurement mode. Options
are pH, mV, RmV (relative mV) and ORP.
In the setup, calibration and other menus, press to scroll right through a list of options.
In the measurement mode, press to log or print a measurement.
In the setup, calibration and other menus, press to scroll down through a list of options.
Keypad Display Information
