Thermo Electron Corporation Orion 290A+, Orion 250A+, Orion 230A+, Orion 210A+ User Manual
Analyze •Detect•Measure •Control
™
Orion Aplus
Portable pH and ISE Meters
INSTRUCTION MANUAL
C
o
MEASURE
ready
Orion 250A+
setup
power
yes
timer
2nd
no
measure
print
mode
cal
Orion 210A+, 230A+,
250A+, 290A+
AQUAfast, Cahn, EZ Flash, Ionalyzer, ionplus, KNIpHE, No Cal, ORION, perpHect, PerpHecT, PerpHecTion, pHISA, pHix, pHuture, Pure Water, Sage, Sensing the Future,
SensorLink, ROSS Ultra, Sure-Flow, TEA Analyzer, Titrator PLUS, TURBO2 and Wine Master are registered trademarks of Thermo Electron Corporation.
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Flash Titration, Flash Titrator, GAP, GLPcal, GLPcheck, GLPdoc, ISEasy, KAP, LabConnect, LogR, Low Maintenance Triode, Minimum Stir Requirement, MSR, NISS, One-Touch,
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trademarks of Thermo.
Guaranteed Success and The Technical Edge are service marks of Thermo.
PerpHecT meters are protected by U.S. patent 6,168,707.
PerpHecT ROSS are protected by U.S. patent 6,168,707.
ORION Series A meters and 900A printer are protected by U.S. patents 5,108,578, 5,198,093, and German patents D334,208 and D346,753.
Sure-Flow electrodes are protected by European Patent 278,979 and Canadian Patent 1,286,720.
ionplus electrodes and Optimum Results solutions are protected by US Patent 5,830,338.
ROSS Ultra electrodes have patents pending.
ORION ORP Standard is protected by US Patent 6,350,367.
ORION Series A conductivity meters are protected by US Patent 5,872,454.
© Copyright 2003, Thermo Electron Corporation. All rights reserved. Question everything, and Analyze. Detect. Measure. Control are trademarks of Thermo Electron
Corporation.
The specifications, descriptions, drawings, ordering information and part numbers within this document are subject to change without notice.
This publication supersedes all previous publications on this subject.
Portable pH/ISE Meter Instruction Manual
Ta ble Of Contents
Table Of Contents
Chapter I Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Chapter II General Information . . . . . . . . . . . . . . . . . . . . . . . . .3
A. Top Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
B. Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
C. Electrode Clip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
D. Electrode Storage Compartment . . . . . . . . . . . . . . . . . . . . . . . . . .7
E. RS232 Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Chapter III Set Up, Self-Test Procedure . . . . . . . . . . . . . . . . . . .9
A. Power Source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
B. Battery Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
C. Power Up and Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
D. Electrode Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Chapter IV Orion 210Aplus . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
A. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
B. Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
C. Self-Test and Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . .15
D. SETUP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Calibration Buffer Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
E. Calibration and Measurement Procedures . . . . . . . . . . . . . . . . .17
pH Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Autocalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Manual Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
F. Dissolved Oxygen Measurements . . . . . . . . . . . . . . . . . . . . . . . .23
Chapter V Orion 230Aplus . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
A. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
B. Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
C. Self-Test and Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . .29
D. SETUP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
E. Calibration and Measurement Procedures . . . . . . . . . . . . . . . . .32
pH Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Autocalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Manual Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
ORP Relative to Normal Hydrogen Electrode (NHE) . . . . . . . . . . .38
Setting ORP Millivolts Offset . . . . . . . . . . . . . . . . . . . . . . . . . .38
F. Dissolved Oxygen Measurements . . . . . . . . . . . . . . . . . . . . . . . .39
Chapter VI Orion 250Aplus . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
A. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Portable pH/ISE Meter Instruction Manual
Ta ble Of Contents
B. Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
C. Self-Test and Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . .45
D. SETUP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
E. Calibration and Measurement Procedures . . . . . . . . . . . . . . . . .49
pH Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Autocalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Manual Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Millivolt Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
ORP Relative to Normal Hydrogen Electrode (NHE) . . . . . . . . . . .55
Setting ORP Millivolts Offset . . . . . . . . . . . . . . . . . . . . . . . . . .55
F. Dissolved Oxygen Measurements . . . . . . . . . . . . . . . . . . . . . . . .56
Chapter VII Orion 290Aplus . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
A. Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
B. Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
C. Self-Test and Checkout Procedure . . . . . . . . . . . . . . . . . . . . . . .61
D. SETUP Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
E. Calibration and Measurement Procedures . . . . . . . . . . . . . . . . .68
pH Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Autocalibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68
Manual Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69
Concentration Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72
Millivolt Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
F. Dissolved Oxygen Measurements . . . . . . . . . . . . . . . . . . . . . . . .77
Chapter VIII Temperature Compensation . . . . . . . . . . . . . . . . . .79
Chapter IX Use with Accessories . . . . . . . . . . . . . . . . . . . . . . .81
A. Use with Printers and Computers . . . . . . . . . . . . . . . . . . . . . . . .81
B. Remote Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Chapter X Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .85
A. Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85
B. Operator Assistance Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87
C. Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
Chapter XI Instrument Warranty . . . . . . . . . . . . . . . . . . . . . . . .93
Chapter XII Service and Repair . . . . . . . . . . . . . . . . . . . . . . . . .97
Chapter XIII Notice of Compliance . . . . . . . . . . . . . . . . . . . . . . .99
Chapter XIV Ordering Information . . . . . . . . . . . . . . . . . . . . . . .101
Chapter XV Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . .103
Portable pH/ISE Meter Instruction Manual
Introduction 1
Chapter I
Introduction
Orion’s Portable Meters are compact, battery operated and microprocessor
controlled for all measurement needs. All meters feature a custom digital
LCD display, which simultaneously displays temperature along with
measurement results. Ideal for field, plant, or laboratory use, each meter is
lightweight and designed to fit comfortably in the hand.
A flip stand allows easy use in the lab.
The Orion 210Aplus is a basic pH meter that features 2 point
autocalibration.
The Orion 230Aplus is a pH meter that features autocalibration and
automatic temperature compensation, millivolt, relative millivolt and (E
H
)
ORP mode.
The Orion 250Aplus has all the features of the 230Aplus plus 3 point auto
calibration and RS232-C output for use with the Orion 900A printer or
other serial peripherals.
The Orion 290Aplus adds concentration measurements and an internal
datalogging function to make a truly versatile meter for pH or ISE analysis.
This manual contains instructions for all four meters. See the calibration
and measurement section for details on your particular meter. The general
information section contains descriptions of hardware which pertain to all
meters. The Temperature Compensation and Troubleshooting sections
contain information applicable to all meters.
Portable pH/ISE Meter Instruction Manual
2
Portable pH/ISE Meter Instruction Manual
General Information 3
Chapter II
General Information
Orion’s Portable Meters have a large custom LCD display and keypad with
tactile and audible feedback. Designed for one-handed operation each
features an electrode clip to attach electrode directly to meter and molded
grip area. (Electrode clips included in Portable Meter Starter Kit, Orion
No. OPBLSK)
Figure 1: Front Panel Orion 250Aplus
Electrode Clip
SETUP CALIBRATE MEASURE
ON
OFF
pH mV Rel mV E
EXP
˚C
ATC
yes
timer
setup
power
Orion 250A+
2nd
ready
hold
timer
bat.
no
measure
print
mode
cal
2nd
H
LCD Display
Keypad
Portable pH/ISE Meter Instruction Manual
General Information4
A. Top Panel
1. Electrode Connections: Accepts BNC connector from combination or
half-cell sensing electrode(s) (1A). A separate pin tip (1B) accepts a
reference electrode.
2. ATC Probe Jack: Accepts thermistor type Automatic Temperature
Compensation probe with DIN connector.
3. Line Converter Jack: Accepts an AC line converter for use without
batteries.
1A
1B
2
3
Figure 2: Top Panel Orion 250Aplus
Portable pH/ISE Meter Instruction Manual
General Information 5
B. Rear Panel
1. Battery Compartment: Accepts one 9 V battery, either alkaline
or lithium.
2. Setup Menu Label: Identifies setup parameters and corresponding
I.D. codes.
3. Electrode Clip: Attaches an electrode directly to the meter for onehanded operation.
4. Electrode Storage Compartment: Stores electrode in between
measurements. Compartment can contain electrode storage solution to
keep electrode moist and ready for use.
5. Cable Management: The cable(s) from the electrode(s) will slide under
the left side of the storage compartment.
Figure 3: Rear Panel Orion 250Aplus
Orion 250A
SETUP:
1-1 READY
1-2 HOLD
1-3 BEEP
1-4 SHUTOFF
2-1 SLOPE
3-1 TIMER INTERVAL
3-2 REMAINING TIME
S/N 000000
© 2003 Thermo Electron Corporation
MADE IN USA
3
1
5
4
2
C. Electrode Clip
The electrode clip allows easy one-handed dip and read operation. Two or
more electrodes may be joined together and then attached directly to
the meter.
1. Slide electrode clip onto electrode.
2. If using two electrodes, slide second electrode clip into opening on the
first electrode clip (see illustration).
3. Attach electrode(s) to meter by sliding clip from left to right into meter
until securely seated.
Portable pH/ISE Meter Instruction Manual
General Information6
Figure 4: Electrode Clip
Portable pH/ISE Meter Instruction Manual
General Information 7
D. Electrode Storage Compartment
The electrode storage compartment provides a convenient place for
electrode storage between measurements and in the field. Add a few drops
of pH electrode storage solution Orion No. 910001 to the storage
compartment cap to ensure your electrode will be ready for use. The entire
compartment is removable for easy cleaning.
The right-hand side of the compartment (when the meter is turned over and
facing down) provides a space for the electrode cables. Slide the cable
underneath the edge of the compartment.
1. With the meter facing down slide the compartment to the right
to remove.
2. Rinse with distilled or deionized water.
3. Replace compartment by lining up pins on meter with slides on
electrode storage compartment then slide to the left until firmly
in place.
Figure 5: Electrode Storage Compartment
Portable pH/ISE Meter Instruction Manual
General Information8
E. RS232-C Interface
Both the Orion 250Aplus and 290Aplus have an RS232-C interface for use
printers or serial peripherals.
The Orion 250Aplus has a one way interface for communication with the
Orion 900A printer or other device. The instrument can send (but not
receive) information via this port.
The Orion 290Aplus has a bi-directional interface for communication with
printers or computers. The instrument can send or receive information
using this port.
The Orion 900A printer is battery operated and attaches directly to either
meter making a compact package for field measurement and recording.
See printer manual, part no. 213377-001.
Portable pH/ISE Meter Instruction Manual
Set Up and Self-Test Procedures 9
Chapter III
Set Up and Self-Test Procedures
A. Power Source
The Orion Portable Meters operate on either one 9V alkaline battery, one
9V lithium battery, or an AC line adapter. The estimated battery life is 50
hours of continuous operation for an alkaline battery and 100 hours of
continuous operation for a lithium battery. Insert battery as described below
or plug in the line adapter.
B. Battery Installation
1. Open battery compartment by pushing closure up. This is most easily
accomplished by using a coin (such as a dime) and inserting it into the
slot on the side of the meter.
2. Insert battery pushing gently until it locks in place. Ensure polarity is
correct as shown in the battery compartment.
3. Replace battery compartment cover.
NOTE: After replacing the battery, recalibrate meter. Without
the battery installed or meter plugged into line power, the meter
loses calibration data and other information in memory. To
prevent loss of data in the field, turn meter off if the low battery
signal comes on. Check and replace batteries regularly prior to
field use.
Figure 6: Battery Compartment
Portable pH/ISE Meter Instruction Manual
Set Up and Self-Test Procedures10
C. Power Up and Self-Test
NOTE: Use this procedure when the instrument is first received
and whenever troubleshooting becomes necessary.
1. Attach the BNC Shorting Plug (Orion No. 090045) to BNC connector
on top of meter.
2. Press the power key to turn meter on.
3. If battery indicator remains on, replace battery or use line adapter.
4. Press the power key to turn meter off.
5. Press the power key and quickly press the yes key to start the self-test.
(Alternatively, press and hold the yes key while pressing the power
key). The instrument automatically performs electronic and hardware
diagnostic tests. For a more detailed explanation, see the self-test
section of the troubleshooting guide.
6. When the code 7 appears in the lower display field, “0” will be
displayed, press each key, including the power key, one at a time. A
numeric digit will be displayed upon each key press.
NOTE: All keys must be pressed within 10 seconds to complete
test 7.
7. For Orion 210Aplus or Orion 230Aplus: After the keypad test, the
meter will shut off.
For Orion 250Aplus or Orion 290Aplus: After the keypad test, the
meter will turn off then back on again. After completing the self-test,
the meter will resume normal operation.
8. If any problems are found during self-test, the meter will display the
operator assistance code until acknowledged by pressing the yes key.
See Troubleshooting section.
Portable pH/ISE Meter Instruction Manual
Set Up and Self-Test Procedures 11
D. Electrode Connections
Orion Triode
Attach Orion TRIODE electrode by sliding the BNC connector onto the
sensor input then push down and turn clockwise to lock into position. Slide
the DIN connector into the ATC jack until it is firmly seated.
Other Electrodes
Attach electrodes with BNC connectors to sensor input by sliding
connector onto input, pushing down and turning clockwise to lock into
position. Connect reference electrodes with pin tip connectors by pushing
connector straight into reference input.
NOTE: If using a combination electrode with a BNC
connector, the reference pin-tip is not used.
Portable pH/ISE Meter Instruction Manual
Set Up and Self-Test Procedures
12
ATC Probe
Attach the ATC probe to the ATC jack by sliding the connector straight on
until firmly in place. The connector has a special sealing mechanism, which
is engaged when the connector is properly attached, to prevent moisture
from penetrating the meter.
Figure 7: Electrode Connections
Pin Tip
BNC
ATC
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus 13
Chapter IV
Orion 210Aplus
A. Display
Operating Mode Indicates instrument operating mode.
SETUP Indicates meter is in setup mode. Used to define
operating parameters.
CALIBRATE Indicates meter is in calibration mode.
MEASURE Indicates meter is in measurement mode.
Main Field Displays pH readings, electrode slope and other
significant information.
Lower Field Displays temperature in degrees Celsius. The ˚C
designation is displayed when temperature is
displayed.
AT C Displayed when a temperature probe is attached.
READY Displayed when the electrode signal has stabilized.
The Ready function may be turned on or off in the
setup menu.
BAT Displayed when the battery is low and needs to be
replaced.
Figure 8: 210Aplus Display
SETUP CALIBRATE MEASURE
ready
˚C
ATC
bat.
4 7 10
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus14
B. Keypad
yes Press to enter a value during calibration or setup. May also
be used to scroll through the setup menu without changing
any parameters.
no Press to cancel a change to a parameter before entering.
May also be used to initiate a change in current setup
parameter.
mode Press to select operating mode: SETUP, CALIBRATE
or MEASURE.
power Press to turn meter on or off.
power
4 7 10
no
mode
yes
Orion 210A+
Figure 9: 210Aplus Keypad
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus 15
C. Self Test and Checkout Procedure
This procedure should be performed when the meter is received and when
operation problems arise. This procedure verifies the proper operation of
the Orion 210Aplus Meter.
1. Attach the Orion shorting cap to the meter.
2. Press the power key to turn meter on.
3. If the low battery indicator remains on, replace the battery or use a line
adapter.
4. Press the power key to turn meter off.
5. Press the power key and quickly press the yes key to start the self-test.
The meter automatically performs electronic and hardware diagnostic
tests.
6. When the code 7 appears in the lower display field, “0” will be
displayed, press each key, including the power key, one at a time. A
numeric digit will be displayed upon each key press.
7. After the self-test is complete, the meter will automatically shut off. To
restart the meter, press the power key.
8. If any problems are found during the self-test, the meter will beep and
an operator assistance code will be displayed until acknowledged by
pressing the yes key. See Troubleshooting.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus16
D. SETUP Menu
Select SETUP mode by pressing the mode key until SETUP is displayed.
The SETUP 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 no key is used to scroll through options within each
parameter. To exit the SETUP mode, press the mode key at any time.
The following parameters are accessed in the SETUP mode:
Resolution
The current pH resolution will be displayed. The default setting is two
decimal places (i.e. pH 7.00). Press the yes key to agree with setting or
press the no key to change to 7.0 and then press the yes key to accept the
new setting.
Slope
The current 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 can not be changed in
the SETUP menu. To change the slope value, perform a two buffer
calibration or set slope during a one buffer calibration. Press the yes key to
advance to next menu option.
Cal. Buffer Option
The current calibration buffer option in meter memory will be displayed as
STD “570” or SET “5E7” on the temperature display.
Auto Calibration Buffer Option
When the “570” option is selected, calibration may only be performed with
standard buffers: pH 4.01, 7.00 and 10.01.
Manual Calibration Buffer Option
When the “5E7” option is selected, calibration may be performed with user
defined buffers within the range of 0 to 14 pH.
NOTE: The chosen buffers must be greater than one (1) pH unit
but less than four (4) pH units from each other.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus 17
E. Calibration and Measurement Procedures
pH Measurements
A one or two buffer calibration should be performed before pH is
measured. It is recommended that a two buffer calibration, using buffers
that bracket the expected sample range, be performed at the beginning of
each day to determine the slope of the electrode. This serves the dual
purpose of determining if the electrode is working properly and storing the
slope value in memory. Perform a one buffer calibration every two hours to
compensate for electrode drift.
Prior to calibration, scroll through the setup menu and ensure all
parameters are set correctly for the analysis you want to perform.
There are two ways of calibrating the 210Aplus Meter: autocalibration or
manual calibration. Following are descriptions and instructions for each
method.
Autocalibration
Autocalibration is a feature of the Orion 210Aplus Meter that
automatically recognizes the buffers 7.00, 4.01 and 10.01 within a range of
(0.5 pH units. Simply select the buffer sequence that best fits your
application, choose between, 7 - 10; 7 - 4; or a one point autocalibration
with pH 7. During calibration wait for READY to be displayed, indicating
electrode stability. Once the electrode is stable, the meter automatically
recognizes and displays the temperature-corrected value for that buffer.
Press the yes key to enter the value into memory.
The 210Aplus Meter compares actual values to theoretical values to
determine if the buffer is within range. Results greater than (0.5 pH units
from the theoretical value will trigger an operator assistance code. For best
results, it is recommended that an ATC probe be used. If an ATC probe is
not used all samples and buffers should be at the same temperature or
manual temperature compensation should be used.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus18
Autocalibration with Two Buffers
1. Connect the electrode(s) to meter. Choose either 4.01 and 7.00, or 7.00
and 10.01 buffers, whichever will bracket your expected sample range.
2. Rinse the electrode(s) and place into the 7.00 buffer.
3. Press the mode key until CALIBRATE is displayed above the main
readout. The last buffer sequence used will be displayed. Press the yes
key to use this sequence, or press the no key to scroll through other
choices, and then press the yes key when the desired sequence is
displayed.
4. The buffer indicator along the bottom of the display will indicate the
buffer chosen. P1 will be displayed in lower display field and buffer
reading will be displayed in the main field.
5. When READY is displayed, indicating electrode stability, the
temperature-corrected value for the buffer is displayed. Press the yes
key. The display will remain frozen for two seconds. Then P2 is
displayed in the lower field indicating the meter is ready for the second
buffer. The buffer indicator along the bottom of the display will
indicate the second buffer of the calibration sequence selected.
6. Rinse the electrode(s) and place into the second buffer.
7. When READY is displayed, indicating electrode stability, the
temperature-corrected value for the buffer is displayed. Press the yes
key. The display will remain frozen for two seconds.
8. After the second buffer value has been entered, the electrode slope will
be displayed. SLP appears in the lower field while the actual electrode
slope (in percent) appears in the main field for 5 seconds.
9. The meter will then automatically advance to the measure mode and
MEASURE is displayed above the main display field.
10. Rinse the electrode(s) and place into the sample. Record pH and
temperature directly from the meter display.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus 19
Autocalibration with One Buffer
NOTE: Autocalibration with one buffer can only be performed
using buffer 7.00
1. Attach the electrode(s) to the meter.
2. Rinse the electrode(s) and place into 7.00 buffer.
3. Press the mode key until CALIBRATE is displayed above the main
readout. The last buffer sequence used will be displayed. Press the no
key until 7 is displayed. Then press the yes key.
4. The buffer indicator along the bottom of display will indicate the
buffer selected (7) and P1 will be displayed in the lower field. The
buffer reading will be displayed in the main field.
5. When READY is displayed, indicating electrode stability, press the yes
key. The temperature-corrected value for that buffer is entered into the
memory of the meter.
6. SLP will appear in the lower display field and the current electrode
slope in memory is displayed in the main field. Press the yes key to
accept value or press the no key to change value. The value in the
main display will blink. Begin editing with the left most digit.
Pressing the no key will scroll the value. Set digit to desired value and
press the yes key. Continue editing each digit until desired slope value
is entered into memory.
7. The meter will then automatically advance to the measure mode and
MEASURE is displayed above the main display field. Rinse the
electrode(s) and place into sample. Both the temperature-corrected pH
reading and temperature reading are displayed. Record reading when
READY is displayed.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus20
Manual Calibration
Manual Calibration with Non-Standard Buffers
The Orion 210Aplus Meter features a manual calibration option when the
use of non-standard buffers is required for calibration. Simply enter the
values of the buffers to be used into the memory of meter in the SETUP
menu. For best results, buffer values entered must be the value of the
buffers at the temperature at which calibration is being performed. Once
these values have been entered, SET (5E7) will appear in the buffer
sequence selections. Select SET and the meter will automatically recognize
the buffer values which were entered in the SETUP menu. These values
will remain in the meter memory until new values are entered.
NOTE: The calibration buffers should be used during the
calibration in the same sequence as they are entered in the
SETUP mode.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus 21
Setting the Manual Buffer Option
Two non-standard buffer values may be set for use in performing
calibrations. The manual buffer pH range is 0 - 14. After these values have
been entered into the memory of the meter, the meter will automatically
use these values during calibration whenever the SET option is selected
during buffer sequence selection at the start of calibration.
NOTE: The difference between the two non-standard buffers
must be at least 1 pH unit and no more than 4 pH units.
1. Select the SETUP mode, by pressing the mode key repeatedly until
SETUP is displayed. Press the yes key twice.
2. STD (570) will be displayed. Press the no key. SET (5E7) will be
displayed. Press the yes key.
3. The value in the main display will blink and P1 will be displayed in
the lower display indicating that the first buffer value is being set.
4. Begin editing with the digit furthest to the left. Press the no key to
scroll the value between 0 and 1. Set digit to desired value and press
the yes key.
5. Continue editing the value for each digit until the desired buffer value
has been entered then press the yes key to enter the buffer value into
the meter memory.
6. The value in the main display will blink and P2 will be displayed in
the lower display indicating that the second buffer value is being set.
7. Begin editing the value for each digit until the desired buffer value has
been entered and press the yes key to enter the buffer value into the
meter memory.
8. The meter will automatically return to the beginning of the SETUP
menu. Press the mode key to exit the SETUP menu.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus22
Manual Calibration with Two Buffers
1. Attach the electrode(s) to the meter. Choose two buffers that will
bracket your expected sample range.
2. Rinse the electrode(s) and place into the first buffer.
3. Enter the non-standard buffer values into meter memory as described
in Setting Manual Buffer Option, page 21 .
4. Select calibration mode by pressing the mode key repeatedly until
CALIBRATE is displayed.
5. The last buffer sequence used will be displayed for 2 seconds. If SET
is displayed press the yes key, otherwise press the no key repeatedly
until SET is displayed. Then press the yes key.
6. The buffer indicator along the bottom of the display will show MAN
indicating manual buffer option selected. P1 will be displayed in the
lower display field and the buffer reading will be displayed in the main
field.
7. When READY is displayed, indicating electrode stability, press the yes
key. P2 will be displayed in the lower display field indicating the meter
is ready for the second buffer.
8. Rinse the electrode(s) and place into the second buffer.
9. When READY is displayed, press the yes key.
10. After the second buffer value has been accepted, the electrode slope
will be displayed. SLP appears in the lower field while the actual
electrode slope (in percent) is displayed in the main field for 5 seconds.
The meter will then automatically advance to the measure mode and
MEASURE is displayed above the main display field. The buffer
indicator, indicates MAN, manual buffer calibration option was used in
the last calibration.
11. Rinse the electrode(s) and place into the sample. If using an ATC
probe, then both the temperature-corrected pH reading and temperature
reading are displayed. Record the reading when READY is displayed.
For best results, it is recommended that an ATC probe be used. If an
ATC probe is not used, all samples and standards should be at the same
temperature or manual temperature compensation should be used.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus 23
F. Dissolved Oxygen Measurements
Dissolved oxygen measurements are displayed in ppm when the
Orion 97-08 Dissolved Oxygen Electrode is used with the Orion 210Aplus
Meter. Follow these instructions for preparing the meter and calibrating
the electrode.
1. Connect the Orion 97-08 to meter and leave electrode mode switch
“OFF”.
2. Disconnect the ATC probe.
NOTE: ATC probe must not be connected to the meter
3. While in MEASURE mode, use the no key to change the temperature
value to 25.0 ˚C.
4. Press the mode key repeatedly until CALIBRATE is displayed. The
last buffer sequence used will be displayed. Press the no key until 7 is
displayed, then press the yes key.
5. When READY is displayed, indicating electrode stability, press the
yes key.
6. SLP will appear in the lower display field and the current electrode
slope in memory is displayed in the main field. Press the no key to
change value to 100.0, then press the yes key.
7. The meter will then automatically advance to the measure mode and
MEASURE is displayed above the main display field.
8. Turn the mode switch on the electrode to BT CK. Good battery
operation is indicated by a reading of 13.40 or greater on the meter.
9. Turn the mode switch on the electrode to ZERO. Use the zero
calibration control to set the meter to read 0.00.
10. Insert the reservoir (funnel) into a BOD bottle containing enough water
to just cover the bottom. Insert the electrode, making sure that the
electrode tip is not immersed in the water and does not have water
droplets clinging to the outside of the membrane. Let stand
approximately 30 minutes to ensure water saturation of air in the BOD
bottle. This bottle should be used for storage between measurements.
11.Turn the electrode mode switch to the AIR position. If measurements
are being made at sea level use the AIR calibration control on the
electrode to set the pH meter reading to the prevailing barometric
pressure in mm Hg (divided by 100). If the barometric pressure is
unknown, if the elevation is above sea level or if the sample has a
salinity greater than 2 parts per thousand, consult Table 1 found in the
Orion 97-08 Instruction Manual to obtain the correct AIR setting.
12. Turn the electrode mode switch to H
2
O for sample analysis.
Portable pH/ISE Meter Instruction Manual
Orion 210Aplus24
Portable pH/ISE Meter Instruction Manual
Orion 230Aplus 25
Chapter V
Orion 230Aplus
A. Display
Operating Mode Indicates instrument operating mode.
SETUP Indicates meter is in setup mode. Used to define
operating parameters.
CALIBRATE Indicates meter is in calibration mode. Accessed
by pressing the 2nd then cal keys.
MEASURE Indicates meter is in measurement mode. Accessed
by pressing the measure key.
Main Field Displays pH readings, electrode slope and other
significant information depending on the meter
operating mode.
ON/OFF Indicates if a particular feature is active or not in
the SETUP menu.
Lower Field Displays temperature in degrees Celsius. The ˚C
designation is displayed when temperature is
displayed.
AT C Displayed when a temperature probe is attached.
Figure 10: 230Aplus Display
SETUP CALIBRATE MEASURE
2nd
ready
hold
ON
OFF
˚C
ATC
pH mV Rel mV
timer
bat.
E
H
Portable pH/ISE Meter Instruction Manual
Orion 230Aplus26
2nd Displayed when the 2nd key has been pressed,
indicating the meter is ready to perform a
secondary function.
READY Displayed when the electrode signal has stabilized.
The READY function may be turned on or off in
the setup menu.
HOLD Displayed when the pH reading is frozen after
reaching stability in measure mode. The HOLD
feature may be turned on or off in the SETUP
menu.
TIMER Displayed when the timer function has been
activated.
BAT Displayed when the battery is low and needs to be
replaced.
Mode Indicator Designates instrument measurement mode either
pH, millivolts (mV) or Relative millivolts (Rel
mV) or ORP Relative to Normal Hydrogen
Electrode (NHE).
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