Thermo Scientific STARA2225, STARA3220, STARA3225, STARA3226 User Manual

English

Thermo Scientific Orion Star A222 and
Star A322 Portable Conductivity Meter

Instruction SheetCond

Preparation

Power Source

1. Power adapter (sold separately)
a. Select the appropriate wall socket plug plate.
b Slide off the clear plastic cover from the plug plate.
c. Slide the plug plate into the groove on the back of the

power adapter.

d. Connect the power adapter to the meter and

power outlet.

2. Batteries (included with meter)
a. Select four AA alkaline batteries.
b. Confirm that the meter is powered off.
c. Remove the battery compartment cover – loosen the

screws holding the battery cover, release the top portion
of the battery cover from the meter (use a coin or your
finger) and release the bottom portion of the battery cover.

d. Orientate the batteries as shown in the battery

compartment housing and insert batteries.

e. Replace the battery compartment cover and screws.

Orion Star A222 &
Star A322 Portable

Use coin
or finger
to lift.

Remove screws

DO/
RDO

POWER

USB

ATC/
COND

REF

RS232

BNC

Electrodes and Other Connections

1. Prepare the conductivity cell and any other applicable electrodes according to
the directions in the electrode user guide.

2. Connect the appropriate items as labeled on the meter and
as shown in the figure above:

Orion Star A222 and Star A322 Portable Conductivity Meters

Display Information

Display Icon Description

Shown when the meter is running on AC power.

Shown when the meter has batteries installed.

Indicates data is being sent to a computer or printer.

Indicates data is being sent to the data log.

Shown when an alarm is set and the alarm value is reached.

Indicates the meter is set to be interfaced with a printer or computer via
the RS232 port.

Indicates the meter is set to be interfaced with a printer or computer via the USB port.

Displays the time and date entered in the setup menu.

C

25.0˚

ATC

HOLD

M

100

Cond

ready

1413 μS/cm

Cell Constant:

0.4750

cal

Displays the current temperature based on the temperature probe reading or
entered temperature value. Shows the origin of the temperature as MAN
(entered temperature) or ATC (temperature probe).

Shown when is pressed and the displayed measurement is frozen.

Indicates a calibration was successfully completed.

Indicates a method is in use and the number of the method being used.

Indicates the type of measurement and determines the type of calibration
that will be performed.

Specifies the stability of the electrode as stabilizing or ready.

Shown when the meter is in AUTO-READ mode. The icon will blink while
the reading is stabilizing and stop blinking when the reading is stable and the
measurement is locked on the display.

Displays the measurement value based on the last saved calibration and current
electrode reading. Units are shown to the right of the value.

Shows the cell constant in use from the last saved calibration.

Shows the operator assigned sample ID number. Star A322 meter only.

Shows the operator assigned user ID number. Star A322 meter only.

Displays the action that will be performed when f1 is pressed.

view log

setup

2

Displays the action that will be performed when f2 is pressed.

Displays the action that will be performed when f3 is pressed.

Keypad Display Information

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 Cond (conduc tivity), T DS (total dissolved solids), Salinity and Res (resistivity).

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, calibr ation and other menus, press to scr oll down through a lis t of options.

Orion Star A222 and Star A322 Portable Conductivity Meters

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

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.

for about three seconds to power the meter off.

3