Thermo Scientific Orion Star A111 User manual

Thermo Scientific Orion Star A111 Benchtop and
Star A121 Portable pH Meters
Reference Guide

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Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
Table of Contents
Chapter 1 Introduction ..........................................................1
Chapter 2 Meter Overview ......................................................3
Connections.......................................................... 3
DisplayInformation ................................................... 4
KeypadInformation ................................................... 5
MeterMaintenance................................................... 5
Chapter 3 Meter Setup ..........................................................7
NavigatingtheSetupMenu ............................................ 7
SetupExamples...................................................... 10
AutomaticpHBufferRecognitionSelection............10
ReadTypeSelection..............................10
ReviewingpHCalibrationSlopeData .................10
Chapter 4 Calibration and Measurement .........................................11
pHCalibrationandMeasurement...................................... 11
pHCalibration...................................11
pHMeasurement ................................11
mVMeasurementandRmV&ORPCalibrationandMeasurement.......... 12
mVMeasurement................................12
RmVandORPCalibration..........................12
RmVandORPMeasurement.......................12
Temperature Measurement and Calibration ............................. 13
TemperatureMeasurement.........................13
TemperatureCalibration ...........................13
Chapter 5 Data Storage and Review .............................................15
Manual Datalog with Continuous Read Mode ........................... 15
Automatic Datalog with AUTO-READ™Mode............................ 15
ViewingtheDatafromtheLastCalibration ............................. 16
ViewingStoredReadings(theDataLog)................................ 16
Chapter 6 Customer Services ...................................................17
MeterErrorCodes.................................................... 17
TroubleshootingGuide................................................ 18
Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Warranty and Registration ............................................ 18
WEEECompliance ................................................... 18
Declaration of Conformity ............................................. 19
MeterSpecifications................................................. 20
OrderingInformation................................................. 21
Chapter 7 Appendix ...........................................................23
AutomaticpHBufferRecognitionFeature..............23
ElectrodeConditionIcon...........................23
Notes............................................................... 24

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1
Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
Chapter 1 Introduction
Thank you for your purchase of the Orion Star A111 benchtop pH or Star A121 portable pH meter. These meters
are capable of measure pH, raw millivolts (mV), relative millivolts (Rmv), oxidation-reduction potential (ORP) and
temperature.
The Orion Star A111 benchtop pH meters are IP54-rated. The Orion Star A121 portable pH meters feature a
waterproof, IP67-rating.
Please read this reference guide thoroughly. Any use outside of these instructions may invalidate your warranty and
cause permanent damage to the meter.

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3
Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
Chapter 2 Meter Overview
Connections
1. Power source:
a. Power adapter (included with Orion Star A111 benchtop pH meters, sold separately for Star A121
portable pH meters) – Select the appropriate wall socket plug. Slide off the clear plastic cover, and slide
on the plug plate into the groove on the back of the adapter.
b. Batteries (included with and factory installed on Star A121 portable meters, sold separately for Star
A111 benchtop meters) – Select four AA batteries. Confirm that the meter is off and remove the battery
compartment cover.
To remove the battery compartment cover:
i. Loosen the screws.
ii. Release the top portion of the battery compartment from the meter (using a coin
or your finger.)
iii. Release the bottom portion of the battery compartment (using a coin
or your finger).
Insert batteries as shown in the battery compartment housing.
2. Prepare the pH electrode according to
the electrode instructions.
3. Connect the appropriate items as
labeled on the meter and as shown in
figure 1.
Push down on tab and lift the
battery cover
Orion Star A111 Benchtop
Remove screws
Orion Star A121 Portable
Figure 1

4Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
Display Information
Display Icon Description
MEAS Indicates that the meter is in the measurement mode.
SETUP Indicates that the meter is in setup mode.
CAL Indicates that the meter is the calibration mode.
MAN Shown when a manual calibration is being done and complete.
AUTO Shown when using automatic buffer calibration (default setting) and has been completed.
Shows the battery status (more bars = more power remaining).
Blinks when power is low and the battery needs to be changed.
Batteries included with and factory installed in the Orion Star A121 portable pH meter.)
Shown when the meter is running on AC power.
(Adapter included with the Orion Star A111 benchtop pH meter.)
Shown when the meter is on AUTO-READ mode. Default setting. AR and unit of measurement will blink until the
reading is stable. When the reading is stable it is held on the screen and AR is lit. Press to take a
new reading.
READY Unit of measurement will blink until the reading is stable. When the reading is stable, READY is lit.
2,4,7,9,10,12 Buffer points that have been calibrated are displayed as follows:
DisplayedBufferValue 24791012
Calibrated USA Buffer Value (at 25°C) 1.68 4.01 7.00 - 10.01 12.46
Calibrated DIN Buffer Value (at 25°C) 1.68 4.01 6.86 9.18 - -
Appears after a complete calibration.
Shows the electrode condition. If the icon has a slash through it, the electrode condition is bad. Consult the
electrode user guide.
Displayed when a reading is stored into the memory.
Displayed when viewing stored readings.
Secondary
display Shows temperature reading in measurement mode and setup menu in setup mode.
Primary display Larger, lower display shows measured value in selected mode.
Instructions Located below the primary display. These phrases aid in the setup menu and calibration modes.

5
Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
Keypad Information
Meter Maintenance
For routine meter maintenance, dust and wipe the meter with a damp cloth. If necessary, warm water or a mild water-
based detergent can be used. Meter maintenance can be performed on a daily, weekly or monthly basis, as required by
the environment in which the meter is operated. Immediately remove any spilled substance from the meter using the
proper cleaning procedure for the type of spill.
In the measurement screen: Press to take a measurement.
In the setup screen: Press to escape the setup menu.
In the calibration screen: Press to abort calibration.
Press to turn the meter on or off.
In the measurement screen:
Press to switch between modes.
In the setup screen:
Press to confirm the selection.
Press to enter the calibration mode. Press to enter the setup mode.
In the measurement screen:
Press to store the data on the screen in continuous
read mode and with data logging on.
In the setup screen:
Press to scroll up in the list of options.
In the measurement screen:
Press to see the stored data.
In the setup screen:
Press to scroll down in the list of options.

6Thermo Scientific Orion Star A111 Benchtop and Star A121 Portable pH Meters
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