0
f
r
pH/mV/°C Data Meter
pH 300 Series
WATERPROOF
MODE
HOLD
ENTER
ON
OFF
CAL
MEAS
MI
▲
MR
▼
SETUP
pH
ATC
READY
MEAS
C
Notes
OPERATING INSTRUCTIONS
Write down the name and information of your OAKTON distributor here.
OAKTON®35618-Series
pH 300 and 31
Portable Waterproo
pH/mV/°C Mete
00806-23
68X248903
I
P
67
R1 1/01
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6. Hold function........................................................................................22
7. Memory functions............................................................................23-24
7.1 Memory Input.....................................................................................................................23
7.2 Memory Recall ....................................................................................................................24
5.3 Taking Measurements..................................................................................................20-21
5. Measurement...................................................................................18-21
4.3 pH calibration................................................................................................................14-15
4.4 Relative mV calibration.....................................................................................................16
5.1 Automatic Temperature Compensation .........................................................................18
5.2 Manual Temperature Compensation..............................................................................19
4.5 Temperature calibration....................................................................................................17
4. Calibration.......................................................................................12-17
4.1 Important information on meter calibration .................................................................12
4.2 Preparing the meter for calibration .................................................................................13
1. Introduction ............................................................................................4
3. Preparation........................................................................................7-11
3.1 Inserting the batteries..........................................................................................................7
3.2 Connecting the electrode and temperature probe.......................................................8-9
3.3 Attaching the electrode holder to the meter..................................................................10
3.4 Inserting the electrode into the electrode holder...........................................................11
2. Display and keypad functions .............................................................5-6
2.1 Display...................................................................................................................................5
2.2 Keypad...................................................................................................................................6
Table of Contents
9. Probe care and maintenance...........................................................40-41
10. Troubleshooting..................................................................................42
11. Error Messages....................................................................................43
12. Specifications......................................................................................44
13. Accessories.....................................................................................45-46
14. Warranty .............................................................................................47
15. Return of Items ...................................................................................47
8.8 Program 6.0: Resetting to factory default settings (pH 310 meter only)
8.6 Program 5.0: Resetting to factory default settings (pH 300 meter only)
8.7 Program 5.0: Setting the real-time clock (pH 310 meter only)
P4.4 Selecting °C or °F (pH 310 meter only)
....................................................................35
.................................37-38
......................36
......................39
P4.1: READY indicator and auto endpoint function....................................................32
P4.2: Selecting number of pH calibration points ..........................................................33
P4.3: Calibration buffer selection sets (pH 310 meter only)
..........................................34
8. Advanced setup functions...............................................................25-39
8.5 Program 4.0: Unit configuration .................................................................................32-33
P3.1 Electrode offset..........................................................................................................30
P3.2 Electrode slope..........................................................................................................31
8.2 Program 1.0: Memory clear...............................................................................................28
8.3 Program 2.0: Viewing previous calibration data...........................................................29
8.4 Program 3.0: Viewing electrode data.........................................................................30-31
8.1 Advanced setup mode overview................................................................................26-27
pH 300 meter......................................................................................................................26
pH 310 meter......................................................................................................................27
32
pH/mV/°C Data Meter
pH 300 Series
WATERPROOF
MODE
HOLD
ENTER
ON
OFF
CAL
MEAS
MI
▲
MR
▼
SETUP
pH
ATC
READY
MEAS
C
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Thank you for selecting an OAKTON meter. This OAKTON portable meter
is a microprocessor-based instrument that measures pH, mV, and temperature.
It’s completely waterproof—and it floats! Your meter has many user-friendly
features, all of which are accessible through the membrane keypad.
This meter includes two electrode holders and batteries.
Please read this manual thoroughly before operating your meter.
1. Introduction
5. mV or relative mV
6. pH indicator
indicator
10. Clock indicator
11. ERRor indicator
Compensation
indicator
(pH 310 meter only)
17. HOLD indicator
18. READY indicator
indicator
2. MEASurement mode
3. CALibration indicator
4. MEMory recall mode
indicator
9.Automatic Temperature
15. Buffer indicator
16. Function ON/OFF
indicator
8. pH buffer selection
(°F available on
pH 310 meter only)
indicator
14. Probe indicator
13. Low battery indicator
indicator
1. SETup mode indicator
14.
13.
7. Temperature indicator
12.
11.
10.
Secondary display
12. MEMory location
9.
15.
AM PM
ATC
pH
OFF
MEM
ERR
C
F
16.
ON
18.
17.
HOLD
READY
pH
SETUP
MEAS
CAL
MEM
R.mV
1.
2.
3.
4.
Primary display
5.
The LCD has a primary and secondary display.
• The primary display shows the measured pH, mV or Relative mV reading.
• The secondary display shows the temperature.
The display also shows error messages, keypad functions and program functions.
2.1
2. Display and Keypad Functions
Display
7.
8.
54
6.
SET....................Press to enter SETUP
MI MR
▲▼
ENTER ............Press to confirm values in Calibration mode and to confirm
..........Press ▲/▼ in setup mode to scroll through subgroups. Also press
CAL/MEAS......Toggles user between Calibration and Measurement mode.
MODE..............Selects the measurement parameter. Press MODE to toggle between
HOLD ..............Freezes the measured reading. To activate, press HOLD while in
pressed, has a corresponding graphic indicator on the LCD.
ON/OFF............Powers and shuts off the meter.
The large membrane keypad makes the instrument easy to use. Each button, when
2.2
Keypad
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SETUP
electrode offset data.
the memory.
mode. SETUP mode lets
you customize meter
preferences and defaults,
and view calibration and
the measured value into memory. MR (memory recall) recalls the
sets of values stored in
selections in Setup mode.
▲/▼ in mV calibration mode to adjust the calibration value.
MI/MR work in the measurement mode. MI (memory input) stores
from sub menus. Press CAL/MEAS again to return to measurement
mode from main menu.
NOTE: Temperature calibration is available from pH calibration mode;
see page 17 for directions.
In advanced set-up mode: Press CAL/MEAS to return to main menu
to enter mV calibration mode.
• If you were in pH measurement mode, press CAL/MEAS to enter
• If you were in mV measurement mode, press CAL/MEAS
pH calibration mode.
pH 310 model only). In pH calibration mode, press MODE to access
temperature calibration.
pH; mV (or relative mV); and date/time (date/time available on
point feature.
pH 310 model only:
measurement mode. To release, press HOLD again.
automatically holds reading after 5 seconds of stability. The HOLD
indicator appears on the display. Press HOLD to release auto end-
When auto endpoint feature is switched on, it
ON
OFF
CAL
MEAS
MI
▲
MR
▼
ENTER
HOLD
MODE
Battery
compartment
Remove these
two screws to
access battery
compartment
Four AAA batteries are included with your meter.
1. Use a Phillips screwdriver to remove the two screws holding the battery cover.
2. Lift off battery cover to expose batteries.
3. Insert batteries. Follow the diagram inside the cover for correct polarity.
4. Replace the battery cover into its original position. Screw cover back into place.
See figure below.
3.1
3. Preparation
Inserting the Batteries
76
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electrodes for use with the pH 300 and pH 310 meters.
6-pin connector (part number 35618-05)
specifically for the pH 300 and pH 310 waterproof meters
3.2
The OAKTON pH/mV meter can use any standard pH, ORP, or ISE electrode with a
BNC connector. For automatic temperature compensation (ATC), this meter requires
a temperature probe with a specialty 6-pin connector.
Use either:
• any electrode with a BNC connector and a separate temperature probe with
• an “All-in-One” combination pH electrode/temperature probe designed
NOTE: Keep connectors clean. Do not touch connector with soiled hands.
See the “Accessories” section on page 45 for a temperature probe and “All in One”
Connecting the Electrode and Temperature Probe
locking ring
temperature probe
top view of 6-pin
connector of
CAUTION: Do not pull on the probe cord or the probe wires might disconnect.
Electrode
(with BNC connector)
Temperature probe
(with 6-pin connector)
2. To remove probe, turn the locking ring counterclockwise on the probe connector.
Pull probe away from the meter.
1. Line up the notch and 6 pins on the meter with the holes in the 6-pin connector.
See figure below.
Push down and turn the locking ring clockwise to lock into place.
CAUTION: Do not pull on the probe cord or the probe wires might disconnect.
To connect the temperature probe:
See figure below.
2. To remove probe, push and rotate the connector counterclockwise. While
holding onto the metal part of the connector, pull probe away from the meter.
socket. Rotate and push the connector clockwise until it locks.
To connect the pH, ORP or ISE electrode:
1. Slide the BNC connector of the probe over the BNC connector socket on the
meter. Make sure the slots of the connector are in line with the posts of the
98
3. Align the flange of the second electrode holder
with the slot of the first holder.
To attach a second electrode holder:
See figure
4. Slide the flange of the second holder into the
slot of the first holder until the tops of the
holders are aligned and secure.
See figure
You can attach the electrode holder in different
positions.
See figure
2. Gently slide the flange of the holder into the
the meter.
slot on the meter. Make sure the holder is
secured properly into the slot.
3.3
Attaching the Electrode Holder
to the Meter
Attaching the electrode holder to the meter
facilitates one-hand operation. Attach two
electrode holders if you have a separate electrode
and temperature probe.
1. Locate the slot on the left hand side of
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C
C
B
A
B
A
NOTE: The holder is designed for probes 12 mm in diameter. Electrodes larger than
of the second holder until the ridge on the housing touches the top of the holder.
12 mm may not fit in the holder. Forcing the electrode into the opening may
damage the holder or your electrode.
1. Insert the pH electrode into the opening of the first holder until the top housing
2. If you are using a separate temperature probe, insert the probe into the opening
of the electrode touches the top of the holder.
Do not use excessive force when inserting electrodes into the holders.
3.4
Inserting the Electrode into the Electrode Holder
1110
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For information on how to calibrate your meter:
• See section 4.3 on pages 14-15 for pH calibration
• See section 4.4 on page 16 for Relative mV calibration
• See section 4.5 on pages 17 for Temperature Calibration of replacement
temperature probes or replacement “All-in-One” electrodes
Program P6.0, page 39 (for pH 310 meter).
When you recalibrate your meter, old pH, Rel mV and mV calibration points are replaced on
a point by point basis. For example, if you previously calibrated your meter at pH 4.01, 7.00,
and 10.01, and you recalibrate at pH 7.00, the meter retains the old calibration data at
pH 4.01 and pH 10.01. To view current calibration points, see Program P2.0 in the SETUP
section, page 29.
To completely recalibrate your meter, or when you use a replacement probe, it is best to set
the meter to its factory defaults and recalibrate the meter at all points. To reset the meter to
its factory defaults, see the SETUP section Program P5.0, page 36 (for pH 300 meter) or
4.1
4. Calibration
Important Information on Meter Calibration
pH 310 meter calibration
The pH 310 meter features three separate buffer sets. Select the buffer set you require in
Set Up mode Program 4.0 (see page 34 for more information). The pH 310 meter is
capable of up to 6-point pH calibration, depending on the buffer set. Select from the
following buffer options:
USA buffers (pH 1.68, 4.01, 7.00, 10.01, 12.45)
NIST buffers (pH 1.68, 4.01, 6.86, 9.18, 12.45)
DIN buffers (pH 1.09, 3.06, 4.65, 6.79, 9.23, 12.75)
The meter automatically recognizes and calibrates to these standard buffer values,
which makes pH calibration faster and easier.
pH 300 meter calibration
The pH 300 meter is capable of up to 5-point pH calibration to ensure accuracy across
the entire pH range of the meter. Select from the following buffer options:
pH 1.68, 4.01, 7.00, 10.01, and 12.45.
The meter automatically recognizes and calibrates to these standard buffer values,
which makes pH calibration faster and easier.
for information on our high-quality OAKTON pH buffers.
4.2
Before starting calibration, make sure you are in the correct measurement mode.
When you switch on the meter, the meter starts up in the units last used. For
example, if you shut the meter off in "mV" units, the meter will read "mV" units
when you switch the meter on.
Be sure to remove the protective electrode storage bottle or rubber cap of the
probe before calibration or measurement. If the electrode has been stored dry,
wet the probe in tap water for 10 minutes before calibrating or taking readings to
saturate the pH electrode surface and minimize drift.
Wash your probe in deionized water after use, and store in electrode storage solu-
tion. If storage solution is not available, use pH 4.0 or 7.0 buffer.
Do not reuse buffer solutions after calibration. Contaminants in the solution can
affect the calibration, and eventually the accuracy of the measurements. See page 41
Preparing the Meter for Calibration
1312
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See figure
5. Wait for the measured pH value to
See figure
primary display will show the measured
reading while the smaller secondary dis-
play will indicate the pH standard buffer
solution.
B
C
C
stabilize.
4. Press CAL/MEAS to enter pH calibration
gently to create a homogeneous sample.
mode. The CAL indicator lights. The
3. Dip the probe into the calibration buffer.
The end of the probe must be completely
immersed into the sample. Stir the probe
2. Rinse the probe thoroughly with
See figure
appears in the upper right hand corner
de-ionized water or a rinse solution. Do
not wipe the probe; this causes a build-up
of electrostatic charge on the glass surface.
of the display.
A
1. If necessary, press the MODE key to
NOTE: We recommend that you perform at least a 2-point calibration using standard
select pH mode. The pH indicator
buffers that bracket (one above and one below) the expected sample range.
You can perform a 1-point calibration, but make sure that the buffer value is
close to the sample value you are measuring.
4.3
pH calibration
C
If the READY indicator has been activiated
(set up program P4.1—see page 32), the READY
annunciator lights when the reading is stable.
READY
CAL
pH
pH
To limit the number of pH buffer values
available during calibration, see section
P4.2 on page 33.
B
pH
electrode and buffer icon blink and the ERR
annunciator appears in the lower left cor-
ner of the display.
CAL
pH
If the selected buffer value is not within
±1.0 pH from the measured pH value: the
ENTER in step 6. Press CAL/MEAS instead.
Notes
To exit from pH Calibration mode without
confirming calibration, DO NOT press
A
MEAS
ATC
C
pH
• If you are performing one-point
8. Follow steps 5 to 8 for additional
9. When calibration is complete,
calibration points.
press CAL/MEAS to return to pH
measurement mode.
7. Rinse the probe with de-ionized water
calibration, go to step 9.
or a rinse solution, and place it in the
next pH buffer.
See figure
• If you are performing multipoint
calibration, go to step 7.
6. Press ENTER to confirm calibration.
The meter is now calibrated to the
current buffer.
D
1514
D
READY
CAL
pH
pH
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• pH 300 meter
• pH 310 meter:
See page 36.
See page 39.
: SETUP Program P 5.0.
SETUP Program P6.0.
Notes
To view the mV offset value, use the
SETUP mode Program P3.1. See page
30 for instructions.
The relative mV (RmV) indicator appears
whenever the mV offset is not zero.
To reset the all calibration and offset values
in memory to the factory default settings,
use:
reading. The RmV indicator appears in
the upper right hand corner.
4. Press the ENTER key to confirm
See figure
the reading and to return to the
measurement mode. The primary
display now shows the relative mV
3. Press the ▲ or ▼ keysto enter the
relative mV value that matches your
desired reading.
C
See figure
the same as the absolute mV value.
relative mV reading and the secondary
display shows the absolute mV value.
NOTE: If you have never calibrated
relative mV or if the meter has been reset,
the value shown in the primary display is
B
2. Press the CAL/MEAS key. The CAL
indicator appears above the primary
display. The primary display shows the
A
See figure
right hand corner.
1. While in the measurement function,
press MODE to enter the mV mode.
The mV indicator appears in the upper
4.4
Relative mV Calibration
press ENTER in step 7. Press CAL/MEAS instead.
temperature, press the ENTER key.
The meter automatically returns to
pH measurement mode.
Notes
• You can offset the temperature reading up to ±5°C from the original reading.
• To exit this program without confirming the temperature calibration value, DO NOT
7. Once you have selected the correct
See figure
B
temperature of the temperature bath).
You can adjust the reading in increments
of 0.1°C.
C
6. Scroll with the ▼ and ▲ keys to set
temperature (i.e. a temperature bath).
Allow time for the temperature probe to
stabilize.
the correct temperature value (i.e. the
B
CAL
mV
5. Dip the ATC probe (or “All-in-One”
See figure
MODE key to enter temperature calibra-
tion mode. The primary display shows the
temperature value with the last set offset
and the secondary display shows the
electrode) into a solution of known
factory default temperature value.
A
4. While in pH calibration mode, press the
calibration mode. The CAL indicator will
appear above the primary display.
CAL
mV
2. Switch the meter on. Press the MODE
3. Press the CAL/MEAS key to enter pH
appear at the right-hand side of the LCD.
key to select pH mode.
A
MEAS
ATC
C
temperature connector of the “All-in-
One” electrode) is attached to the 6-pin
connector. The ATC annunciator will
mV
Temperature calibration
1. Make sure the ATC probe (or
pect temperature errors that may have occurred over a long period of time or if you
have a replacement probe.
The temperature sensor is factory calibrated. Calibrate your sensor only if you sus-
4.5
Temperature Calibration
1716
B
CAL
ATC
C
A
CAL
ATC
C
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For automatic temperature compensation
(ATC) simply plug the temperature probe
into the meter (see page 9 for directions).
The ATC indicator will light on the LCD.
See figure
NOTE: If you are using a temperature
probe, the probe must be submersed in the
liquid you are measuring.
A
A
MEAS
5.1
5. Measurement
This meter is capable of taking measurements with automatic or manual temperature
compensation. Automatic temperature compensation only occurs when a temperature sensor
is plugged into the meter. If there is no temperature sensor plugged into the meter, the default
manual temperature setting is automatically 25°C. You can manually set the temperature to
match your working conditions using a separate thermometer.
Automatic Temperature Compensation
Notes
To exit this program without confirming the
manual temperature compensation value,
DO NOT press ENTER in step 6. Press
CAL/MEAS instead.
The meter will now compensate pH
readings for the manually set temperature.
measurement mode.
B
See figure
6. Press ENTER to confirm the selected
temperature and to return to the pH
B
5. Press the ▲ or ▼ keys to offset the
temperature to the measured value
from step 4.
using an accurate thermometer.
ATC
C
pH
1. Switch the meter on. Press the MODE
4. Check the temperature of your sample
See figure
and secondary display show the last set
value.
A
A
3. While in pH calibration mode, press
the MODE key to enter temperature
calibration mode. The primary display
2. Press the CAL/MEAS key to enter pH
calibration mode. The CAL indicator will
appear above the primary display.
key to select pH mode.
IMPORTANT: For manual compensation,
you must disconnect the temperature probe
(see page 9).
5.2
Manual Temperature Compensation
1918
CAL
C
C
CAL
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to create a homogenous sample.
4. Allow time for the reading to stabilize.
5. To toggle between pH and mV (or Rel
Note the reading on the display.
mV) readings, press the MODE key.
3. Dip the probe into the sample.
When dipping the probe into the sample,
the sensor or the glass bulb of the electrode
must be completely immersed into the
sample. Stir the probe gently in the sample
A
See figure
appears in the lower right hand corner
to indicate Automatic Temperature
Compensation (See page 19 to set
Manual Temperature Compensation).
2. Press ON to switch on meter. The
solution.
MEAS annunciator appears on the top
center of the LCD. The ATC indicator
A
MEAS
Be sure to remove the electrode soaker bottle or protective rubber cap on the
electrode before measurement.
To take readings:
1. Rinse the probe with deionized or
distilled water before use to remove any
impurities adhering to the probe body.
If the pH electrode has dehydrated, soak
it for 30 minutes in OAKTON electrode
storage solution or a 2M–4M KCl
Taking Measurements
5.3
ATC
C
pH
Taking measurements with READY indicator selected on
If the READY indicator has been activated, the READY annunciator lights when
the reading is stable*. Switch the READY indicator on or off in Set up program
P4.1—see page 32 for directions.
Taking measurements with the auto endpoint feature selected on
NOTE: this feature is available on model pH 310 only.
When a reading is stable for more than 5 seconds, the auto endpoint feature will
automatically “hold” the reading. The “hold” indicator appears on the left side of
the display. Press the HOLD key to release the reading. Switch the Auto endpoint
feature on or off in Set up program P4.1—see page 32 for directions.
*The READY indicator appears and the reading holds until the measured value exceeds the tolerance
(± 0.02 pH; ± 0.8 mV <400; ±1.2 mV >400). Then, the READY annunciator turns off.
2120
the display will automatically
“hold” a reading that has been
stable for more than 5 seconds.
The “hold” indicator appears.
Press the HOLD key to release
the reading. To switch on or off the
auto endpoint feature, see Set up
program P4.1 on page 32.
NOTE: For pH 310 model only
longer storage, use the memory
functions (see pages 23-24).
meter has an auto endpoint feature.
When this feature is switched on,
2. To release the held value, press HOLD
again. Continue to take measurements.
See figure
display.
A
NOTE: This meter shuts off automatically
after 30 minutes of nonuse.
If the meter is shut off either
automatically or manually, the
HOLD value will be lost. For
temperature readings for a delayed
observation. HOLD can be used any
time when in MEAS mode.
1. To hold a measurement, press the
HOLD key while in measurement
mode. "HOLD" will appear on the
This feature lets you freeze the value
of the pH, mV (or Relative mV) and
6. HOLD function
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: The pH 310
See figure
NOTE: If the memory is full, the first value
stored will be erased to create space
for the new value.
A
2. MEM, “Sto” and memory number
(MEAS), press the MI key to input any
data into the memory
will flash. The meter then returns to
measurement mode.
A
HOLD
MEAS
ATC
C
pH
To store a reading:
1. During any measurement function
values. In addition to the standard data set, the pH 310 meter also stores the date
and time the reading was stored.
pH 300 meter:
values. For example, you can store 7 pH and 9 mV values.
pH 310 meter:
The pH 300 meter can store up to 16 sets of data in any combination of
The pH 310 meter can store up to 50 sets of data in any combination of
• pH and temperature
• mV (or relative mV) and temperature.
Your meter stores data in sets:
7.1
Memory Input
7. Memory functions
2322
A
MEM
MEM
SETUP
MEM
pH
SETUP
pH
SETUP
SETUP
MEAS
SETUP
SETUP
MEM
pH
SETUP
pH
SETUP
SETUP
SETUP
MEAS
SETUP
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Notes
Readings stored in memory are retained even if the unit is turned off. To erase all
readings stored in memory, use the SETUP mode P1.0 on page 28.
key to return to the Measurement mode.
6. Repeat steps 2-5 to review additional
7. To exit Memory Recall, press the MEAS
stored data sets.
“memory location” screen.
the next “memory location” screen;
press the ▼ key to select the previous
See figure
5. If necessary, press the ▲ key to select
E
4. The display automatically moves to
See figure
key again to view the date and time
the reading was taken. Press the
ENTER key again to return to the
the next memory location screen.
“memory location” screen.
pH 310 meter only:
3. pH 300 meter only: Press the ENTER key
again to return to the “memory location”
screen.
D
Press the ENTER
See figure
See figure
2. Press the ENTER key to recall the read-
screen—MEM, “Loc” and the memory
ing stored under that memory number.
number—will flash on the display.
To recall readings:
1. Press the MR key once to retrieve the
This function recalls the previous readings stored in the memory. You can only
access MR from the MEASurement mode. Memory recall is in “Last In First Out”
order.
7.2
last reading stored. The memory location
Memory Recall
C
B
E
pH 300 Advanced
set up subgroups
D
Time/date appears on pH 310 meter display only
PM
MEM
MEM
C
C
pH
6. pH 310 only: P6.0: Reset to factory default settings (rSt)
B
MEM
3. P3.0: Viewing electrode data (ELE)
4. P4.0: Unit configuration (COF)
5. pH 300 only: P5.0: Reset to factory default settings (rSt)
MEM
The advanced set up mode lets you customize your meter’s preferences and
defaults. Your OAKTON waterproof meter features different sub groups that
organize all set-up parameters.
The sub groups are:
1. P1.0: Memory clear (CLR)
2. P2.0: Viewing calibration data (CAL)
pH 310 only: P5.0: Setting clock (CLO)
8. Advanced set up functions
pH 310 Advanced
set up subgroups
2524
Instructions on page 36
SETUP
MEM
SETUP
MEM
SETUP
MEAS
Instructions on pages 32-33
SETUP
Instructions on page 30-31
SETUP
Instructions on page 29
SETUP
Instructions on page 28
pH 300 meter set up mode
Press the SETUP key to enter Set up mode.
Press the ▲ and ▼ keys to scroll through sub groups.
8.1
Advanced set-up mode overview
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P5.0: Reset to factory default
• P5.0: Reset to factory default settings
P4.0: Unit configuration
• P4.1: Ready indicator on or off
• P4.2: # of calibration points: 2, 3, 4, or 5
• P3.2: pH electrode slope
In mV (or relative mV) measurement mode:
• P3.1: relative mV offset
pH
In pH measurement mode:
• P3.1: pH electrode offset
pH
P3.0: Viewing electrode data
• P2.4: Fourth calibration point
• P2.5: Fifth calibration point
• P2.1: First calibration point
• P2.2: Second calibration point
• P2.3: Third calibration point
P2.0: Viewing previous calibration data
P1.0: Memory clear
• P1.0 Clear all stored readings
Instructions on page 39
• P6.0: Reset to factory default settings
Instructions on pages 37-38
SETUP
MEAS
P6.0: Reset to factory default
SETUP
P5.0: Setting Clock
• Setting year
• Setting date (month/day)
• Setting time (hour/minute/second)
Instructions on pages 32-35
• P4.3: Select calibration buffer set: USA, DIN, or NIST
• P4.4: Select °C or °F
available for DIN buffer set only)
SETUP
P4.0: Unit configuration
• P4.1: Ready indicator on or off
• P4.2: # of calibration points: 2, 3, 4, 5, or 6 (6th point
Instructions on page 30-31
SETUP
pH
P3.0: Viewing electrode data
In pH measurement mode:
• P3.1: pH electrode offset
• P3.2: pH electrode slope
In mV (or relative mV) measurement mode:
• P3.1: relative mV offset
Instructions on page 29
pH
• P2.1: First calibration point (plus time/date)
• P2.2: Second calibration point (plus time/date)
• P2.3: Third calibration point (plus time/date)
• P2.4: Fourth calibration point (plus time/date)
• P2.5: Fifth calibration point (plus time/date)
• P2.6: Sixth calibration point (plus time/date)-only
Instructions on page 28
SETUP
P2.0: Viewing previous calibration data
P1.0: Memory clear
• P1.0 Clear all stored readings
available when DIN buffer set is selected in P4.3
pH 310 meter set up mode
2726
5. Press the ENTER key to confirm selec-
tion and return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
See figure
between NO and YES.
• NO retains current memory
• YES clears all memory
3. Press the ENTER key to enter parameter
4. Press the ▲ and ▼ keys to toggle
P1.0.
default setting.
From measurement mode:
1. Press the Set up key to enter Set Up
2. Press the ▲ and ▼ keys to scroll through
See figure
subgroups until you view parameter P1.0.
mode.
NOTE: Selecting YES will wipe out all memory.
Use this parameter to clear all memory values when you need to store a new series of
values. This lets you avoid confusing the old values with the new ones. NO is th e
8.2
P1.0: Memory Clear
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B
B
SETUP
MEM
A
A
SETUP
MEM
See figures and
Notes
If there is no previous calibration data at a
particular point, the primary display will
show “----”.
CAL/MEAS key to return to measure-
ment mode.
4. When you have scrolled through all
calibration data, you will automatically
return to the subgroup menu. Press the
date and time of calibration.
B
C
C
Time/date appears on pH 310 meter display only
SETUP
AM
B
See figure
repeatedly to view previous calibration
data. The meter will first display the
calibration point, and then display the
pH 310 meter only:
3. pH 300 meter only: Press the ENTER key
P2.0.
repeatedly to view previous calibration
data.
B
See figure
2. Press the ▲ and ▼ keys to scroll through
subgroups until you view parameter
A
Press the ENTER key
A
SETUP
SETUP
From measurement mode:
1. Press the Set up key to enter Set Up
This mode lets you recall previous calibration data, which helps you know when to
recalibrate your meter. This is a “view only” mode.
8.3
mode.
P2.0: Viewing previous calibration data
2928
pH
pH
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See figure
5. Press the ENTER key to to proceed to
step 4 of P3.2. Or, press the CAL/MEAS
key to return to measurement mode.
mode—see page 16 for instructions.
C
See figure
offset in relative mV calibration
any buffer, the primary display shows
0.0 mV.
• If you are in mV measurement mode,
the display shows the relative mV
offset. You can adjust the relative mV
B
3. Press the ENTER key to select
4. The display shows the electrode offset
value.
• If you are in pH measurement mode,
the display shows the mV offset at
pH 7.00. If you have not calibrated at
See figure
parameter 3.1.
2. Press the ▲ and ▼ keys to scroll
through subgroups until you view
parameter P3.0.
A
1. Press the Setup key to enter Set Up
Program 3 has two “view only”options that lets you check the electrode parameters
for diagnostic purposes.
P3.1: Electrode offset
From measurement mode
mode.
P3.0: Viewing electrode data
8.4
C
SETUP
R.mV
B
pH
mV
5. Press the ENTER key to return to the
subgroup menu. Press the CAL/MEAS
key to return to measurement mode.
A
SETUP
3. Press the ENTER key twice to select
See figure
calibrations. Default setting is 100.0.
E
4. The display shows electrode slope
in percentage. Slope displayed is
the average slope based on the pH
See figure
parameter 3.2.
parameter P3.0.
D
SETUP
pH
From measurement mode
2. Press the ▲ and ▼ keys to scroll
through subgroups until you view
1. If necessary, press the MODE key to
select pH measurement mode. Press
the Setup key to enter Set Up mode.
P3.2: Electrode slope
NOTE: this parameter is available in
pH measurement mode only.
3130
E
SETUP
pH
%
D
SETUP
pH
*The READY indicator appears and the reading holds until the measured value exceeds the tolerance
(± 0.02 pH; ± 0.8 mV <400; ±1.2 mV >400). Then, the READY annunciator turns off.
Notes
Meter default is set for Ready indicator on,
and auto endpoint function off.
mode.
5. Press the ENTER key to confirm selection
and to proceed to step 4 of P.4.2. Press the
CAL/MEAS key to return to measurement
feature on.
•OFF switches the READY indicator off.
•ON switches the READY indicator on.
• pH 310 meter only:
together switches the auto endpoint
See figure
4. Press the ▲ and ▼ keys to select the
configuration you require.
3. Press the ENTER key to select
See figure
parameter 4.1.
subgroups until you view parameter P4.0.
From measurement mode
1. Press Setup key to enter Set Up mode.
2. Press the ▲ and ▼ keys to scroll through
other functions. Select auto endpoint off to deactivate this feature.
pH 310 meter only:
P4.1: READY indicator and auto endpoint function
Program P4.1 lets you select “READY indicator on” to indicate when the reading is
stable*, or select “READY indicator off” for faster meter response.
or off. Select auto endpoint on to “hold” the reading when it is stable for more than
5 seconds. The display automatically freezes, and the HOLD indicator appears on
the left side of the display. Press the HOLD key to release the display and access
8.5
P4.0: Unit configuration
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ON and HOLD
B
ON
READY
SETUP
B
A
Program P4.1 also lets you switch the Auto endpoint function on
A
SETUP
5. Press the ENTER key to confirm selection
and to return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
D
See figure
4. Press the ▲ and ▼ keys to select 2, 3, 4,
or 5 point pH calibration.
3. Press the ENTER key twice to select
parameter 4.2.
D
See figure
C
C
ON
READY
SETUP
2. Press the ▲ and ▼ keys to scroll through
more quickly if you regularly calibrate at less than 5 points.
P4.2: Selecting number of pH calibration points
Program P4.2 lets you select the number of calibration points that appear in pH
calibration mode: 2, 3, 4, or 5. This lets the meter scroll through the calibration points
From measurement mode
1. Press Setup key to enter Set Up mode.
subgroups until you view parameter P4.0.
SETUP
3332
5. Press the ENTER key to confirm selection
and to return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
See figure
4. Press the ▲ and ▼ keys to select the
buffer set you require:
• USA buffers
• NIST buffers
• DIN buffers
(pH 1.09, 3.06, 4.65, 6.79, 9.23, 12.75)
(pH 1.68, 4.01, 7.00, 10.01, 12.45)
(pH 1.68, 4.01, 6.86, 9.18, 12.45)
3. Press the ENTER key three times to
select parameter 4.3.
See figure
subgroups until you view parameter P4.0.
calibration buffers.
Available in pH 310 meter only
The pH 310 meter lets you select between three standard calibration buffer sets,
depending on your requirements. The available sets are USA, NIST, and DIN standard
From measurement mode
1. Press Setup key to enter Set Up mode.
2. Press the ▲ and ▼ keys to scroll through
P4.3 Calibration buffer selection sets
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F
F
SETUP
E
E
SETUP
5. Press the ENTER key to confirm selec-
tion and to return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
H
4. Press the ▲ and ▼ keys to toggle
between °C and °F.
SETUP
See figure
3. Press the ENTER key four times to
See figure
select parameter 4.4.
H
G
G
2. Press the ▲ and ▼ keys to scroll through
subgroups until you view parameter P4.0.
SETUP
The pH 310 meter lets you select between °C and °F units for temperature readings.
P4.4 Selecting °C or °F
Available in pH 310 meter only
From measurement mode
1. Press Setup key to enter Set Up mode.
3534
F
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5. Press the ENTER key to confirm selec-
tion and to return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
See figure
4. Press the ▲ and ▼ keys to toggle
between NO and YES.
• NO retains current settings
• YES resets to factory default settings
3. Press the ENTER key to enter
parameter P5.0.
B
See figure
P5.0.
A
In the pH 300 meter, Program 5 lets you reset all parameters to factory default
settings. This clears all calibration data, memory, and any other setup functions you
From measurement mode
1. Press Setup key to enter Set Up mode.
2. Press the ▲ and ▼ keys to scroll through
subgroups until you view parameter
might have changed.
Available in pH 300 meter only
8.6
P5.0: Resetting to factory default settings
See figure
continued on next page
10. Press the ▲ and ▼ keys to toggle to
the correct date.
E
The “date” digits will flash.
See figure
8. Press the ▲ and ▼ keys to toggle to the
9. Press the ENTER key to confirm the
month and move to “date” selection.
correct month.
D
7. Press the ENTER key to confirm the
year and move to “month” selection.
The “month” digits will flash.
See figure
6. Press the ▲ and ▼ keys to toggle to the
correct year.
C
B
SETUP
MEAS
See figure
4. Press the ▲ and ▼ keys to toggle to the
5. Press the ENTER key to confirm the
century and move to “year” selection.
The “year” digits will flash.
correct century.
The century digits will flash.
B
A
3. Press the ENTER key to enter
See figure
parameter P5.0. The meter lets you
select the century: “19-” or “20-”.
A
SETUP
MEAS
The pH 310 meter features a real-time calendar and clock. This helps you meet GLP
From measurement mode
1. Press Setup key to enter Set Up mode.
2. Press the ▲ and ▼ keys to scroll through
subgroups until you view parameter
P5.0.
(Good Laboratory Practice) standards.
Available in pH 310 meter only
8.7
P5.0: Setting the real-time clock
3736
E
SETUP
D
SETUP
C
SETUP
B
SETUP
A
SETUP
Notes
Press the CAL/MEAS key at any point
while setting the time to return to the
subgroup menu.
measurement mode.
18. Press the CAL/MEAS key to return
to the subgroup menu. Press the
CAL/MEAS key again to return to
selection.
See figure
16. Press the ▲ and ▼ keys to toggle to
17. Press the ENTER key to confirm
the seconds and return to “century”
the correct seconds.
See figure
14. Press the ▲ and ▼ keys to toggle to
15. Press the ENTER key to confirm the
minutes and move to “second” selec-
tion. The “second” digits will flash.
the correct minutes.
13. Press the ENTER key to confirm the
hour and move to “minute” selection.
The “minute” digits will flash.
“PM” indicator on the lower portion
of the display.
See figure
12. Press the ▲ and ▼ keys to toggle to
the correct hour. Note the “AM” and
11. Press the ENTER key to confirm the
date and move to “hour” selection.
The “hour” digits will flash.
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H
H
SETUP
AM
G
G
F
F
SETUP
AM
AM
SETUP
5. Press the ENTER key to confirm selec-
tion and to return to the subgroup menu.
Press the CAL/MEAS key to return to
measurement mode.
B
See figure
4. Press the ▲ and ▼ keys to toggle
between NO and YES.
• NO retains current settings
• YES resets to factory default settings
3. Press the ENTER key to enter
parameter P6.0.
B
See figure
P6.0.
A
A
SETUP
MEAS
Available in pH 310 meter only
In the pH 310 meter, Program 6 lets you reset all parameters to factory default
settings. This clears all calibration data, memory, and any other setup functions you
might have changed.
From measurement mode
1. Press Setup key to enter Set Up mode.
2. Press the ▲ and ▼ keys to scroll through
subgroups until you view parameter
SETUP
MEAS
8.8
P6.0: Resetting to factory default settings
3938
Clogged reference junction: heat a diluted KCl solution to 60 to 80°C. Place the
sensing part of the electrode into the heated solution for about 10 minutes. Allow the
electrode to cool in some unheated KCl solution.
Protein deposits: prepare a 1% pepsin solution in 0.1 M of HCl. Set the electrode in
the solution for five to ten minutes. Rinse the electrode with distilled water.
Reactivating the pH electrode
If stored and cleaned properly, your pH electrode should be ready for immediate
use. However, a dehydrated bulb may cause sluggish response. To rehydrate the
bulb, immerse the electrode in a pH 4 buffer solution for 10 to 30 minutes. If this
fails, the electrode requires activation. Never touch or rub glass bulb. Contact
builds up an electrostatic charge.
pH electrode cleaning
Salt deposits: dissolve the deposits by immersing the electrode in tap water for ten
to fifteen minutes. Ten thoroughly rinse with distilled water.
Oil/grease film: wash electrode pH bulb gently in some detergent and water. Rinse
electrode tip with distilled water or use a general purpose electrode cleaner (see
page 40 for ordering information).
NOTE: If this does not restore electrode to normal response, see “Reactivating the
never wipe electrode.
2. Store the electrode as recommended above in “pH electrode storage,” or as
3. Prior to next use, rinse the liquid junction with de-ionized water and tap dry—
recommended by the manufacturer.
After measuring
1. Rinse the pH electrode and reference junction in de-ionized water.
electrode (see page 45 for ordering information). Also, you can store in a pH 4 buffer
with 1/100 part of saturated KCl. Other pH buffers are OK for storage, but NEVER
use distilled water for storage.
pH electrode storage
For best results, always keep the pH bulb wet. Use the protective electrode storage
bottle or rubber cap filled with OAKTON electrode storage solution to store your
Since your pH electrode is susceptible to dirt and contamination, clean it every one
to three months depending on the extent and condition of use.
NOTE: for specialty electrode care, consult the instruction manual included with
9. Probe Care and Maintenance
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pH electrode” section below.
your electrode.
acceptable results. You may repeat step 3 through 6 up to three times for better
response. If the response does not improve, then your electrode is no longer
functioning. Replace with a new electrode—call your OAKTON Distributor for more
information.
6. Leave for 15 minutes in distilled or deionized water.
7. Now test with standard calibration buffer solutions to see if the electrode yields
1. Dip or stir the pH electrode in alcohol for 5 minutes.
2. Leave the electrode in tap water for 15 minutes.
3. Dip and stir the electrode in concentrate acid (such as HCl or H
4. Repeat step 2.
5. Dip and stir in strong base (NaOH) for five minutes.
minutes.
2
SO
4
) for five
WARNING: Only qualified persons proficient with the safe handling of dangerous
chemicals should perform the procedure below. Provide proper containers, fume
hoods, ventilation, and waste disposal. Safety goggles and protective clothing must
be worn while performing this procedure. If possible, replace with another electrode
instead of performing this reactivation procedure.
pH electrode activation (for glass bodied electrodes only)
4140
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Slow response a) Dirty/Oily probe. a) Clean probe. See "Probe
e) Broken probe. e) Replace probe. See page 45.
nearby electric motor.
or induction caused by interfering motor.
d) External noise pickup d) Move or switch off
enough in sample. covers the probe sensors.
c) Probe not deep c) Make sure sample entirely
Unstable a) Air bubbles in probe. a) Tap probe to remove bubbles.
readings
b) Dirty probe. b) Clean the probe and
Problem Cause Solution
Power on but a) Batteries not in place. a) Check that batteries are in
no display place and making good
b) Batteries not in correct b) Reinsert batteries with
c) Weak batteries. c) Replace batteries or attach
polarity (+ and –). correct polarity.
10. Troubleshooting
CAL & Err Calibration error Wrong buffer value Check your buffer input
contact.
LCD
Display
Err Unrecognized input Wrong input in Release key. Select
annunciator from keypad selected mode. valid operations
11. Error Messages
Care & Maintenance",
page 40.
If an error message appears in the primary
display (the upper row of larger digits),
switching off the meter and switching it on
again may eliminate the error message.
See figure
If error persists, or the meter shows
incorrect values, return the meter.
For a complete diagram of the display,
see page 5.
recalibrate.
* See "Warranty" and "Return of Items" on page 47
Battery Low battery level Need new batteries Clean battery contacts.
indicator blinks or battery Replace batteries with fresh
optional AC adapter.
annunciators on/ input at calibration. value, clean probe.
Buffer and Dirty probe. See Calibration sections or
electrode Probe Maintenance section.
indicators blink
A
Indicates Cause Solution
4342
ERR 1 in primary display
connection is bad ones, noting polarity
A
depending on mode.
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Housing: meets IP67 standards for waterproof and dustproof housing
Shipping weight: 1.3 lbs (0.6 kg)
Boxed: 9.2"L x 8.5"W x 2.75"H
(23.3 cm x 21.6 cm x 7 cm)
Dimensions:
Meter: 7.5"L x 3.5"W x 1.75"H
(19.1 cm x 8.9 cm x 4.5 cm)
Temperature compensation: automatic (ATC) or manual from 0 to 100°C
Operating temperature: 0 to 50°C
Power: four 1.5 V AAA batteries (included)
Battery life: > 100 hours
pH slope range: 80% to 110%
Memory:
pH 300 meter: up to 16 data sets (pH or mV plus temperature)
pH 310 meter: up to 50 data sets (pH or mV plus temperature, date, and time)
Calibration
pH 300 meter: Up to five points (pH1.68, 4.01, 7.00, 10.01, 12.45)
Temperature: Offset in 0.1°C increments
mV: Offset up to ±150 mV
DIN buffers (pH 1.09, 3.06, 4.65, 6.79, 9.23, 12.75)
pH 310 meter: Up to six points—select from three different buffer sets:
NIST buffers (pH 1.68, 4.01, 6.86, 9.18, 12.45)
USA buffers (pH 1.68, 4.01, 7.00, 10.01, 12.45)
Input BNC connector 6-pin plug BNC connector
Accuracy ±0.01 pH
Resolution 0.01 pH
Mode pH Temperature mV
Range -2.00 to 16.00 pH (also 14.0 to 230.0°F
12. Specifications
Continued on next page
NOTE: Remember to check the temperature calibration when replacing the ATC
probe or when using with an OAKTON
temperature probe. See section 4.5, "Temperature calibration" (page 17).
electrodes and maintains electrode sensitivity. (1.1 lbs)
145 mm L x 12 mm diameter (0.5 lb)
00653-04 Electrode storage solution, 1 pint bottle. Keeps electrode bulb moist for
faster, more accurate readings. (1.1 lbs)
00653-06 Electrode cleaning solution, 1 pint bottle. Removes buildup from
35618-05 Temperature probe. For pH 300 and pH 310 meters
35808-71 Replacement “All-in-One” combination pH/temperature probe,
single junction, sealed, 145 mm L x 12 mm diameter (0.5 lb)
35801-00 pH electrode, epoxy body, single-junction,
145 mm L x 12 mm diameter (0.5 lb)
35805-13 ORP electrode, epoxy body, single-junction,
±0.5˚C (also ±0.5˚F ±0.2 mV between ±199.9 mV
for pH 310 meter) ±2 mV beyond ±199.9 mV
all in a hard shell carrying case
35618-12 Replacement pH 310 meter
35618-72 Waterproof pH 310 meter kit. Includes “All-in-One” probe, five each of pH
“Singles” buffer pouches pH 4.01; 7.00; 10.01; and rinse water, one squeeze bottle for
deionized rinse water, batteries, instructions and two electrode brackets, all in a hard
Electrodes and probes
shell carrying case
for pH 310 meter)
for pH 310 meter) 1 mV beyond ±199.9 mV
0.1˚C (also 0.1°F 0.1 mV between ±199.9 mV
“Singles” buffer pouches pH 4.01; 7.00; 10.01; and rinse water, one squeeze bottle for
deionized rinse water, batteries, instructions and two electrode brackets,
–10.0 to 110.0˚C
(same for Rel mV)
-2000 to 2000 mV
Replacement meters
35618-02 Replacement waterproof pH 300 meter
35618-70 Waterproof pH 300 meter kit. Includes “All-in-One” probe, five each of pH
13. Accessories
4544
®
"All-in-One" combined pH and
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To order OAKTON accessories, contact your OAKTON distributor.
pH 4.01, pH 7.00, and pH 10.00 solution pouches.
OAKTON “Singles” calibration solution pouches
pH solutions have ±0.01 pH accuracy at 25°C. Shpg wt 1.1 lb (510 g) per box.
35653-00 Deionized rinse water solution pouches, 20/box.
35653-01 pH 4.01 calibration buffer solution pouches, 20/box.
35653-02 pH 7.00 Calibration buffer solution pouches, 20/box.
35653-03 pH 10.00 Calibration buffer solution pouches, 20/box.
35653-04 Assortment pack, 5 each deionized water,
00654-12 pH 12.45 calibration buffer, 1 pint.
OAKTON calibration solutions
pH solutions have ±0.01 pH accuracy at 25°C. Shpg wt 1.1 lb (510 g).
00654-01 pH 1.68 calibration buffer, 1 pint.
00654-00 pH 4.01 calibration buffer, 1 pint.
00654-04 pH 7.01 calibration buffer, 1 pint.
00654-08 pH 10.01 calibration buffer, 1 pint.
returning items for any reason. When applying for authorization, please include
data regarding the reason the items are to be returned. For your protection, items
must be carefully packed to prevent damage in shipment and insured against possi-
ble damage or loss. We will not be responsible for damage resulting from careless or
insufficient packing. Arestocking charge will be made on all unauthorized returns.
NOTE: We reserve the right to make improvements in design, construction, and
appearance of products without notice.
Authorization must be obtained from our Customer Service Department before
15. Return of items
Out-of-warranty products will be repaired on a charge basis.
14. Warranty
OAKTON warrants this meter to be free from significant deviations in material
and workmanship for a period of three years from date of purchase. OAKTON
warrants this probe to be free from significant deviations in material and
workmanship for a period of six months from date of purchase. If repair or
adjustment is necessary and has not been the result of abuse or misuse within
the warrantied time period, please return—freight prepaid—and correction will
be made without charge. OAKTON alone will determine if the product problem
is due to deviations or customer misuse.
4746
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