Oakton pH 610 User manual

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Part of Thermo Fisher Scientific
68X415307 Rev. 1 Oct 07
Integrated Instruction Manual
WP 600 Series Meters
pH 600/ 610/ 620, COND 600/610, DO 600,
PC 650, PD 650, CD 650, PCD 650

*IMPORTANT – PLEASE READ BEFORE YOU CONTINUE*
PLEASE USE THIS MANUAL IN THIS ORDER:
Step 1:
Use the first half of this manual “General Guide” to set up and calibrate your
instrument. [Including the temperature parameter guide] (Pages 1 - 35)
Step 2:
Then go to the specific parameter guides (eg. pH, Con, TDS etc) which are relevant
to the model you have purchased. (Pg 36 onwards)
CAUTION: Do not skip the general guide as your meter will not be configured to read
accurately if your set-up and calibrations are not done accordingly.
Thank you for reading this page. Please proceed.

Table of Contents
GENERAL GUIDE.................................................................................... 1
1. Overview – For All Meters .....................................................................................3
1.1 About the Meters............................................................................................................................... 3
1.1.1 Display Overview.................................................................................................................... 3
1.1.2 Key Functions.......................................................................................................................... 3
1.2 Inserting Batteries ............................................................................................................................. 4
1.2.1 Inserting batteries for the first time......................................................................................... 4
1.2.2 Changing batteries subsequently........................................................................................... 4
1.3 Attaching the Belt .............................................................................................................................. 5
1.4 Connecting Peripherals..................................................................................................................... 6
1.4.1 Probes (pH/Conductivity/DO)................................................................................................. 6
1.4.2 Protective Rubber Boot .......................................................................................................... 7
2. System Setup .........................................................................................................7
2.1 System Settings ................................................................................................................................ 7
1. Setup Mode – For All Meters...............................................................................14
1.1 About Setup Mode .......................................................................................................................... 14
1.2 Accessing Setup mode (no password protection enabled)............................................................. 14
1.3 Accessing Setup mode when password protection enabled .......................................................... 15
1.4 Modifying Setup parameters ........................................................................................................... 16
2. Calibration Mode - For All Meters ......................................................................18
2.1 About Calibration............................................................................................................................. 18
2.2 About Conductivity/ Resistivity/ TDS/ Salinity Calibration............................................................... 18
2.3 Prepare the Meter for Calibration.................................................................................................... 18
2.4 Accessing Calibration mode............................................................................................................ 20
2.4.1 Accessing Calibration mode when password protection enabled........................................ 20
3. Measurement Mode – For All Meters..................................................................21
3.1 About Measurement Mode.............................................................................................................. 21
3.1.1 Accessing functions.............................................................................................................. 22
3.2 Taking Measurements..................................................................................................................... 23
3.2.1 Prepare the meter for measurement .................................................................................... 23
3.2.2 Taking a reading................................................................................................................... 23
3.2.3 Stable reading indicator ....................................................................................................... 23
3.2.4 Holding a reading ................................................................................................................. 24
3.3 Automatic Temperature Compensation (ATC)................................................................................ 24
3.3.1 Manual Temperature Compensation (MTC) ........................................................................ 24
3.4 Alarm set point (For pH/conductivity/DO) ....................................................................................... 25
3.5 Calibration Due (CAL-DUE) Indicator (For pH/conductivity/DO) .................................................... 25
TEMPERATURE ....................................................................................27
1. Temperature Setup ..............................................................................................29
2. Temperature Calibration......................................................................................29
2.1 About Temperature Calibration....................................................................................................... 29
2.2 Temperature Calibration for ATC mode.......................................................................................... 30
2.3 Temperature Calibration for MTC mode ......................................................................................... 31
3. Temperature Measurement .................................................................................31
pH........................................................................................................... 33
1. pH Setup ...............................................................................................................35
2. pH Calibration.......................................................................................................36

2.1.1 About pH Calibration ............................................................................................................36
2.2 pH buffer group for calibration and auto-recognition ...................................................................... 37
2.2.1 pH Calibration points ............................................................................................................ 37
2.3 pH Calibration with a Standard Buffer............................................................................................. 37
2.4 pH Calibration with a User-defined Buffer.......................................................................................39
2.5 Calibration Report ........................................................................................................................... 40
2.6 Average Slope Indicator of pH Probe .............................................................................................41
3. pH Measurement Mode........................................................................................42
3.1 Resolution of pH Reading ............................................................................................................... 42
3.2 Indicators in pH measurement screen ............................................................................................ 42
mV..........................................................................................................43
1. mV Setup Mode ....................................................................................................45
2. mV Calibration Mode ...........................................................................................45
2.1 mV Calibration Report..................................................................................................................... 46
3. mV Measurement Mode .......................................................................................46
1.1 Indicators in mV measurement mode .................................................................................. 46
ION .........................................................................................................49
1. Ion Setup...............................................................................................................51
2. Ion Calibration Mode............................................................................................51
2.1 About Ion Calibration....................................................................................................................... 51
2.2 Calibration Report ........................................................................................................................... 53
2.2.1 To View calibration Report ................................................................................................... 53
3. Ion Measurement Mode .......................................................................................54
1.1 Changing unit of measurement ............................................................................................ 54
1.2 Indicators in Ion measurement mode................................................................................... 54
CONDUCTIVITY.....................................................................................55
1. Conductivity Setup ..............................................................................................57
2. Conductivity Calibration Mode ...........................................................................59
2.1 Conductivity Calibration mode ........................................................................................................ 59
2.1.1 Conductivity calibration points.............................................................................................. 59
2.2 Cell constant 59
2.3 Normalization Temperature (°C)..................................................................................................... 59
2.4 Linear temperature Coefficient........................................................................................................ 59
2.5 Pure Water Coefficient .................................................................................................................... 60
2.6 To begin Calibration ........................................................................................................................ 60
2.7 Manual Calibration .......................................................................................................................... 61
2.8 Automatic calibration (For Conductivity Calibration)....................................................................... 61
2.9 Calibration Report ........................................................................................................................... 63
3. Conductivity Measurement Mode .......................................................................64
1.1 Indicators in Conductivity measurement screen .................................................................. 64
TDS ........................................................................................................65
1. TDS Setup.............................................................................................................67
2. TDS Calibration Mode..........................................................................................69
2.1 TDS Calibration Report ................................................................................................................... 70
3. TDS Measurement Mode .....................................................................................70
3.1 Indicators in TDS measurement mode ........................................................................................... 70
SALINITY ...............................................................................................72
1. Salinity Setup .......................................................................................................74
2. Salinity Calibration Mode ....................................................................................75
2.1 Salinity Calibration Report............................................................................................................... 76

2.1.1 To View salinity Report:........................................................................................................76
3. Salinity Measurement Mode................................................................................77
3.1 Indicators in salinity measurement mode........................................................................................ 77
RESISTIVITY .........................................................................................79
1. Resistivity Setup ..................................................................................................81
2. Resistivity Calibration Mode ...............................................................................82
2.1 Resistivity Calibration Report .......................................................................................................... 83
2.1.1 To View resistivity Report:.................................................................................................... 84
3. Resistivity Measurement Mode...........................................................................84
3.1 Indicators in Resistivity measurement mode .................................................................................. 84
DISSOLVED OXYGEN .......................................................................... 87
PART A - % Saturation Mode............................................................... 89
1. O2 % - DO Saturation Setup...............................................................................89
2. DO Calibration in % Saturation Mode (with ATC)..............................................91
2.1 About DO(%) and DO (mg/L) Calibration........................................................................................ 91
2.2 To calibrate 100% saturation .......................................................................................................... 91
2.3 To calibrate 0% saturation .............................................................................................................. 93
2.3.1 % DO Calibration Report...................................................................................................... 94
2.3.2 To View calibration Report: .................................................................................................. 94
2.4 % Saturation Offset Adjustment...................................................................................................... 95
2.5 Set barometer pressure range and barometric pressure units ....................................................... 95
2.6 Pressure compensation .................................................................................................................. 95
3. Percentage Saturation (%) Measurement Mode ................................................96
3.1 Indicators in percentage saturation measurement mode................................................................ 96
PART B – Concentration (mg/L) (ppm) Mode .................................... 97
1. O2 mg/L (ppm) – DO Concentration Setup ........................................................97
2. DO Calibration in mg/L or ppm Concentration Mode........................................99
2.1 Concentration Calibration Report.................................................................................................. 100
2.1.1 To View Concentration Report: .......................................................................................... 100
2.2 Set Salinity 101
2.2.1 Auto Salinity Compensation ............................................................................................... 101
3. Concentration in Measurement Mode ..............................................................101
1.1 Indicators in concentration measurement screen .............................................................. 101
1. TRANSFERRING AND PRINTING DATA...........................................................103
1.1 CyberComm 600 Data Acquisition Software................................................................................. 103
1.2 Working with Memory functions – Auto Data Logging .................................................................. 103
1.2.1 Logging data automatically in the meter’s memory............................................................ 103
1.2.2 Storing a current measurement (In IrDA and LED print mode: Applicable to all modes) .. 104
1.2.3 Viewing stored data............................................................................................................ 104
1.2.4 Transferring stored data to the Computer (CyberComm) through IrDA............................. 104
1.2.5 Transferring stored data to a PC not equipped with infrared receiver. .............................. 106
1.2.6 Transferring stored data to a PC using an USB/ irDA Dongle. .......................................... 107
Technical Specifications.......................................................................................108
Accessories ...........................................................................................................112
1. APPENDIX...........................................................................................................114
1.1 Conductivity theory........................................................................................................................ 114
1.2 Calculating TDS Conversion Factor.............................................................................................. 116
1.3 Calculating Temperature Coefficients........................................................................................... 116

1.4 Dissolved Oxygen Probe............................................................................................................... 117
1.4.1 Dissolved Oxygen Principle ............................................................................................... 117
1.4.2 Probe Care ......................................................................................................................... 117
1.4.3 Membrane Housing Replacement...................................................................................... 118
1.4.4 Membrane/O-ring Replacement (Optional Procedure) ...................................................... 118
1.4.5 Electrolyte Solution............................................................................................................. 119
General Information...............................................................................................120
Warranty…………................................................................................................................................ 120
Return of Goods.. ................................................................................................................................ 120
Guidelines for Returning Unit for Repair.............................................................................................. 120

1
GENERAL GUIDE
This section is applicable to all models of the
WP 600 Series Meters. Please do not skip this
section.
Model Parameters
pH 600 Temperature (with ATC), pH (-2.00 to 20.00 measuring range).
pH 610 Temperature (with ATC), pH (expandable resolution to 0.001).
pH 620 Temperature (with ATC), pH (expandable resolution to 0.001)
and Ion.
COND 600 Temperature (with ATC), Conductivity, TDS.
COND 610 Temperature (with ATC), Conductivity, TDS, Salinity,
Resistivity.
DO 600 Temperature (with ATC), Dissolved Oxygen (% & ppm).
PC 650 Temperature (with ATC), pH, mV, Ion, Conductivity, TDS,
Salinity, Resistivity.
PD 650 Temperature (with ATC), pH, mV, Ion, Dissolved Oxygen (% &
ppm).
CD 650 Temperature (with ATC), Conductivity, TDS, Salinity,
Resistivity, Dissolved Oxygen (% & ppm).
PCD 650 Temperature (with ATC), pH, mV, Ion, Conductivity, TDS,
Salinity, Resistivity, Dissolved Oxygen (% & ppm).

2

3
1. Overview – For All Meters
1.1 About the Meters
SPECIAL FEATURES
•Displays and measures up to 4 parameters simultaneously
•Automatic temperature compensation
•Built in memory backup to save calibration and 500 sets of measured data
•Data logging feature date-and-time stamp to meet Good Laboratory Practice (GLP)
•Data transmission through IrDA or RS232 through LED
•User-selectable ‘CAL-DUE’ and set point alarm functions
•Power source and Battery level indicator
•Designed to work either from mains power or battery and automatically detect and switch to
mains if available
•Waterproof casing
•User-configurable password protection for calibration & setup data
•Intuitive on-screen messages appear to assist user
1.1.1 Display Overview
1.1.2 Key Functions
Key Function
Selects the function shown (in the display) just above the
key. (For ON key, press and hold for 3 seconds.
Navigates to next available functions
Increment/decrement values in Setup & Calibration modes.
Navigates to sub groups in Setup selection screen.
In Setup mode, confirms selection or modified values
In Calibration mode, confirms calibration points or modified
values
Indicators Used in Header Area
Power Source & Battery Level
Conductivity range of the probe
Power Source: DC Adapter Average slope of the pH probe
Data Transmission mode: LED Current Time in 24 Hour format
Data Transmission mode: Infrared Password Protection: Disabled
Data Logging Mode: Internal
Memory Password Protection: Enabled

4
1.2 Inserting Batteries
NOTE:Please ensure that the gasket is in place otherwise the instrument will not
be waterproof.
Power up your meter using either:
1. Four ‘AA’ size 1.5 V alkaline batteries (supplied) or,
2. 9V DC power adapter (Optional in some models).
1.2.1 Inserting batteries for the first time
1. Use a Phillips screw driver to remove the four screws holding the battery cover.
2. Insert the batteries in the right direction.
3. Replace the battery cover and screws. Note the ▲UP symbol marked on the
cover.
4. Press the ON (F4) key. Hold the key down until the display appears.
5. Set the system date & time before you start operating the meter for the first
time.
1.2.2 Changing batteries subsequently
1) Connect the adapter before changing the batteries.
2) If DC adapter is not available, switch off the meter and change the
batteries within 30 seconds to avoid resetting the clock. This prevents the
system time from resetting automatically.

5
1.3 Attaching the Belt
To attach the safety belt:
1. Use a Phillips screw driver to remove the four screws holding the battery cover.
2. Insert the safety belt through the two slots as indicated below.
3. Screw the battery cover back on. Note the ▲UP symbol marked on the cover.
4. Insert your palm between the belt and the body of the meter and adjust the
hook & loop fastener.
Note the correct side
of the belt
Battery Cover
Hook & Loop
fastener

6
1.4 Connecting Peripherals
1.4.1 Probes (pH/Conductivity/DO)
Attach the probes with correct type of connectors as indicated.
Use the electrode properly for best results:
1) Keep the protective plastic electrode guard in
tact during measurement and calibration. DO
NOT REMOVE IT.
2) Always immerse the electrode beyond upper
steel band as shown. Do NOT submerge the
electrode above the protective yellow cap.
3) Be sure to remove the protective electrode storage bottle or rubber cap
of the pH electrode before calibration or measurement.
NOTE: If the electrode has been stored dry, wet the electrode in clean
water for 10 minutes before calibrating or taking readings to saturate the
pH electrode surface and to minimize drift.
pH Probe (BNC)
Conductivity Probe
with built in
temperature sensor
(8-pin Connector)
Use this socket for
the standalone
temperature probe
in the pH only
models.
DO Probe with
built in temperature
sensor (6-pin
Connector)

7
1.4.2 Protective Rubber Boot
The rubber boot protects the meter when used in the field. For bench top
applications, lift up the stand at the back of the rubber boot.
PLEASE SET UP THE SYSTEM BEFORE YOU BEGIN USING
THE METER. USE THE FOLLOWING INSTRUCTIONS:
2. System Setup
System setup sub-group allows you to configure general settings of the meter. The
settings are displayed in 6 pages. Press NEXT-P (F2) and PREV-P (F1) to navigate
through these pages.
2.1 System Settings

8
Parameter Description Factory Default
STABLE
Indicator
ENABLE - The meter displays ‘Stable’ indicator in the
measurement screen as per the ‘STABLE CRITERIA’
defined below.
DISABLE – ‘Stable’ indicator does not appear.
ENABLE
Stability
Criteria
SLOW – The reading is stabilized slowly and exhibits
good repeatability
MEDIUM – Reading stability is averaged between
slow & fast stability
FAST – Reading is stabilized quickly at the cost of
repeatability.
(This parameter has no effect if ‘STABLE’ parameter
is disabled)
FAST
Auto Hold ENABLE - The meter holds the reading in the
measurement screen, if the reading is ‘Stable’ for 5
seconds.
If this is enabled, ‘Response time’ appears in the
measurement screen, indicating the average response
time of the probe.
DISABLE – The reading is not held
(This parameter has no effect if ‘STABLE’ parameter
is disabled. The response time may not work if the
system time has not been set as described previously.
DISABLE
Tem. Display
from
Allows you to select temperature from pH/COND/DO
probes to display in multi measurement screen.
For PCD 650-pH/COND->DO
-
Display
setting:-
Allows you to select multi modes that you would like to
be displayed on the 1st and 2nd row of the
measurement screen after calibration.
1st Row :
pH/Ion/mV/Conductivity/Salinity/Resitivity/TDS/O2
mg/L (ppm)/ O2 (%)
2nd Row :
pH/Ion/mV/Conductivity/Salinity/Resitivity/TDS/O2
mg/L (ppm)/ O2 (%)
3rd Row :
pH/Ion/mV/Conductivity/Salinity/Resitivity/TDS/O2
mg/L (ppm)/ O2 (%)
-
NOTE: In order to activate the RESPONSE TIME function, you have to first activate
the STABLE and AUTO HOLD functions.

9
System Settings – Page 2
Figure 1 : System Settings - Page 2
This page allows you to set the date & time of the meter.
Parameter Description Factory Default
Year Sets the current year 2006
Month Sets the current month Jan
Date Sets the current date 01
Hour Sets the hour (24 Hours) for the current time 00
Minute Sets the minute for the current time 00
Second Sets the second for the current time 00
System Settings – Page 3
Figure 2 : System Settings - Page 3
This page allows you to set auto-off and back light related parameters.

10
Parameter Description Factory Default
Auto OFF ENABLE – Turns the meter off automatically if no key is
pressed for the time period specified in ‘ON TIME’ below.
However, this will happen only if you are using the battery,
NOT when the meter is plugged into an AC power source
or when it is printing data.
DISABLE – Meter does not turn off automatically.
ENABLE
ON Time After the last key is pressed, no. of minutes the meter
should wait before automatically shuts down the meter.
Maximum range: 30 min
(This parameter has not editable if ‘AUTO OFF’ parameter
is disabled)
10 min
Back Light
(permanently
ON)
ENABLE – Sets the back light always on.
DISABLE – Sets the backlight always off.
DISABLE
Back Light
ON with
(Key press)
ENABLE – The back light of the LCD is automatically on
when any key is pressed.
DISABLE – Does not turn on the back light automatically.
DISABLE
ON time with
(Key press)
Sets the meter to wait for specified number of minutes
before automatically turning off the back light after the last
key is pressed.
(This parameter is not editable when ‘BACK LIGHT (Key
press)’ is disabled)
(This parameter has no effect if ‘BACK LIGHT (Always)’
parameter is set to ON)
1 min
System Settings – Page 4
Figure 3: System Settings - Page 4
Note: The above settings may not work if the system time has not been
set as described previously.

11
This allows you to set wireless serial data communication related parameters.
Parameter Description Factory Default
Print Mode IrDA – Sets serial data communication protocol to
IrDA
LED – Sets serial data communication protocol to
RS232C
MEM- Logs data to meter’s memory.
IrDA
Data Format CyberComm – Select this format if you use
CyberComm Data Acquisition Software (DAS)
TEXT – Select this format if you use any other method
(such as Windows®Hyperterminal)
This parameter is used when downloading data from
the meter through IrDA
CyberComm
Current Data
Set
TIMED – Prints measurement data continuously at the
interval specified in ‘INTERVAL’ parameter below.
SINGLE – Prints only the currently measured reading
This parameter applies when PRIN key is pressed
from measurement mode to send the currently
measured readings to the computer.
TIMED
Interval
(3 Sec Step)
Time interval at which the meter should send currently
measured data to the printer/CyberComm/PCD
Acceptable range : 3 sec to 600 sec (in 3 sec steps)
(This parameter is applicable when ‘CURRENT DATA
SET’ is set to ‘TIMED’ and this is not editable when
‘CURRENT DATA SET’ is set to ‘SINGLE’)
9 Sec
Fixed Setting Indicates serial communication settings in the format
of ‘Baud rate, Data bits-Parity bits-Stop bits’. This
parameter is not editable.
2400 8-N-1
System Settings – Page 5
This allows you to enable password protection for the setup mode & calibration mode.

12
When you enable password protection, the meter prompts you to enter the password
whenever you try to access the Setup or Calibration mode. The meter does not allow
you to edit setup parameters or perform a new calibration unless you enter the
correct password. If an incorrect password is entered for 3 consecutive times, the
meter goes to measurement mode.
Parameter Description Factory Default
Password
Protection
ENABLE – Sets password protection for the setup &
calibration mode. If this is enable you need to specify
a 5-digit password in the ‘SET PASSWORD’
parameter below
DISABLE – Disable password protection of the meter
DISABLE
Set Pass
Word
Specify your 5-digit password here. Use (Up) &
(Down) key to select a number and then press ENTER
key to confirm and move to the next digit.
Do not set your password to ‘00000’ as this is
reserved for ‘read-only’ password.
(This parameter is not editable when ‘PASSWORD
PROTECT’ is disabled)
88888
Confirm New
Password
YES – Select this if you have made changes to the
password and you wish to confirm the changes.
NO – Select this if you wish to ignore the changes
made to the password and to store the default
password.
NO
I
mportant:
1. Please memorize the password that you have entered after enabling the
password protection. Without it, you can’t disable the password
protection or reset the meter to factory defaults. However, if the user
forgets his password, he can contact the nearest distributor or
Eutech Instruments/Oakton Instruments to request for meter
password. This would be unique to each instrument and would be tied
to the serial number of the unit.
2. Default password ‘88888’ is valid only if it is not changed with new
password.
3. You can enter ‘00000’ (read-only password) if you wish to view the setup
parameters. You are not allowed to modify any parameter when you
enter ‘read-onl
y
password’.