Oakton PH550 Instruction Manual
PH550 Benchtop pH Meter
Instruction Manual
Oakton Instruments
www.4oakton.com
Manual Version 3.2
Table of Contents
1 Brief Introduction ............................................................................................................ - 1 -
1.1 Main Features ...................................................................................................................... - 1 -
2 Technical Specifications.................................................................................................... - 1 -
3 What’s in the Box? ........................................................................................................... - 2 -
4 Instrument Description .................................................................................................... - 2 -
4.1 LCD Display .......................................................................................................................... - 2 -
4.2 Keypad ................................................................................................................................ - 3 -
4.3 Connectors .......................................................................................................................... - 4 -
4.4 Stable reading display mode ................................................................................................. - 4 -
4.5 Data storage, recall, and deletion ......................................................................................... - 4 -
4.6 Max/Min Function ............................................................................................................... - 5 -
5 pH Measurement ............................................................................................................. - 5 -
5.1 Preparation .......................................................................................................................... - 5 -
5.2 pH Electrode Information ..................................................................................................... - 5 -
5.3 Information regarding Calibration ......................................................................................... - 6 -
5.4 pH Meter Calibration ............................................................................................................ - 8 -
5.5 Measuring pH ...................................................................................................................... - 9 -
5.6 Parameter Setting .............................................................................................................. - 11 -
5.7 pH Electrode’s Maintenance ............................................................................................... - 12 -
6 mV measurement .......................................................................................................... - 13 -
6.1 ORP measurement ............................................................................................................. - 13 -
6.2 Notes on ORP measurement ............................................................................................... - 13 -
7 Recommended pH Electrodes for Specific Applications ................................................... - 14 -
8 Warranty ....................................................................................................................... - 14 -
- 1 -
1 Brief In t r o d uc tion
Thank you for purchasing Oakton Instruments PH550 Benchtop pH meter.
This instrument is an outstanding combination of advanced electronics design and sensor technology. It’s the
most economical choice of a reliable lab-grade benchtop pH meter. Please read this maual carefully to
properly use and maintain the meter. Oakton Instruments reserves the right to update the contents of this
manual without giving prior notices.
1.1 Main Features
• The meter has a built-in microprocessor chip, which enables intelligent functions such as automatic
calibration, automatic temperature compensation, data storage, parameter setup, max/min reading
display, etc.
• The advanced automatic calibration mode has calibration guide and self-diganosis functions,
automatically recognizing standard buffer solutions (USA or NIST series).
• The advanced digital processing technology intelligently improves the meter’s response time and
measuring accuracy with stable reading display mode available.
• The kit comes with a 3-in-1 combination pH Electrode, measuring pH and temperature simultaneously.
• IP54 dustproof and spillproof. Connectors are protected by silicone seal caps, effectively ensuring the
reliability and service life of the meter under harsh environment.
• Detachable electrode holder and 3 bottles of pH buffer solutions come with the kit for convenient use.
2 Technical S p e c i fications
pH
Range
0 to 14.00 pH
Resolution
0.01/0.1 pH
Accuracy
±0.01 pH ±1 digit
Temperature
Compensation
0 to 100 ˚C (Auto or Manual)
Calibration
1 to 3 points automatic calibration
mV
Range
-1999 mV - 0 - 1999 mV
Resolution
1 mV
Accuracy
±0.1% F.S ±1 digit
Temp.
Range
0 to 100˚C; 32 to 212°F
Resolution
0.1˚C; 0.1/1°F
Accuracy
±0.5˚C ±1 digit
Others
Data Storage
50 groups
Storage Content
Numberings, Measurement, Unit, Temperature, Temperature
Compensation Status
Power
DC9V/300mA
IP Ratings
IP54 dustproof and spillproof
Size and Dimension
(240*235*103) mm/1kg
- 2 -
3 What’s in the Box?
Content
Quantity
3.1
35419-30, PH550 Benchtop pH Meter
1
3.2
35419- 31, Plastic 3-in-1 Combination pH Electrode
1
3.3
pH standard buffer solutions (4.00/7.00/10.01 pH;
(50ml for each)
1 for each
3.4
9V Power Adapter
1
3.5
Electrode Holder
1 set
3.6
Instruction Manual
1
4 Instrume n t D e scription
4.1 LCD Display
(1) — Measurement value
(2) — Calibration icons and numberings
(3) — Measurement unit
(4) — Temperature and reminder icons
(5) — The pH unit displayed during calibration
(6) — The pH value displayed during calibration, numberings for storage and recall, and reminder icons
(7) — Icons for data storage and recall — M+: store measuring data; RM: Recall measuring data
(8) — Self-Diagnosis icons and numberings
(9) — Temperature compensation mode icons — ATC: Auto Temperature Compensation; MTC: Manual
Temperature Compensation
(10) — Completed calibration icons
(11) — Stable reading icon
(12) — Icons for maximum and minimum values
Figure-1
- 3 -
4.2 Keypad
3.2.1. Keypad operations
Short press ----- <1.5 seconds; Long press ----- >1.5 seconds.
3.2.2 For keypad operation, please see Table-1.
Table – 1 Keypad operations and descriptions
Keypad
Operation
Functions
Short Press
• Power on/off
Short Press
• Select measuring mode: pH→mV.
Long Press
• Enter parameter setting：P1→P2→…P4.
Short Press
• Enter Calibration mode
• Cancel any operation and go back to measurement mode
Short Press
• In calibration mode, press to conduct calibration
• In parameter setting, press to confirm selection
Short Press
• Store measuring data
Long Press
• Recall stored measuring data
Short Press
or
Long Press
• In manual temperature compensation mode, short press to change
temperature, long press to change quickly
• In parameter setting mode, short press to change parameter and settings.
• In recall mode, short press to change numberings, long press to change
quickly.
Short Press
• Buttons for max/min values (refere to section 3.6)
Figure-2
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