1. Introduction
This manual provides instructions for the proper use and maintenance of the Oakton AO-35613-22 pH 6+ Handheld Meter. This portable device is designed for accurate pH measurements in various applications. Please read this manual thoroughly before operating the meter.
2. Safety Information
- Always handle the pH probe with care.
- Do not immerse the meter body in liquid.
- Use only specified batteries (4 AAA).
- Keep the device out of reach of children.
- Refer to local regulations for proper disposal of batteries and electronic waste.
3. Package Contents
Verify that all items are present upon unpacking:
- Oakton AO-35613-22 pH 6+ Handheld Meter
- pH Probe
- ATC (Automatic Temperature Compensation) Probe
- Protective Rubber Boot
- 4 AAA Batteries
4. Product Overview
The Oakton AO-35613-22 is a portable pH meter designed for accurate and rapid measurements. It features an LCD display, intuitive controls, and automatic temperature compensation.
Figure 1: Oakton AO-35613-22 pH 6+ Handheld Meter. The image shows the meter with its LCD display showing '7.00 pH', and connected pH and temperature probes. The meter is encased in a protective rubber boot.
Key Features:
- Portable design for field and lab use.
- LCD display for clear readings.
- pH range: 0.00 to 14.00.
- mV range: ±1999.
- Temperature range: -10 to 110 °C.
- Automatic Temperature Compensation (ATC) from 0 to 100 °C.
- Protective rubber boot for durability and as a meter stand.
5. Setup
5.1 Battery Installation
- Remove the protective rubber boot.
- Locate the battery compartment cover on the back of the meter.
- Open the cover and insert four (4) AAA batteries, observing polarity.
- Replace the battery compartment cover and the protective rubber boot.
5.2 Probe Connection
- Connect the pH probe to the BNC connector on the top of the meter.
- Connect the ATC probe to the mini-jack connector next to the BNC connector.
- Ensure connections are secure.
6. Operating Instructions
6.1 Power On/Off
- Press the ON/OFF button to turn the meter on.
- Press the ON/OFF button again to turn the meter off.
6.2 Taking a Measurement
- Ensure the meter is calibrated (refer to Section 7).
- Rinse the pH probe and ATC probe with distilled water.
- Immerse both probes into the sample solution. Ensure the probe tips are fully submerged.
- Allow the reading to stabilize on the LCD display.
- Press the HOLD/ENTER button to freeze the reading if desired. Press again to release.
- After measurement, rinse probes thoroughly with distilled water and store them properly.
6.3 Mode Selection
Press the MODE/°C/°F button to switch between pH, mV, and temperature display modes.
7. Calibration
Regular calibration is essential for accurate pH measurements. The meter supports up to 5-point calibration with NIST and USA buffer recognition.
- Prepare fresh pH buffer solutions (e.g., pH 4.01, 7.00, 10.01).
- Rinse the pH and ATC probes with distilled water.
- Immerse both probes into the first buffer solution (e.g., pH 7.00).
- Press the CAL button. The meter will automatically recognize the buffer and calibrate.
- Once stable, rinse probes and repeat the process for subsequent buffer solutions (e.g., pH 4.01, then pH 10.01).
- Refer to the full calibration procedure in the detailed manual for advanced settings and multi-point calibration.
8. Maintenance and Care
8.1 Cleaning
- Wipe the meter body clean with a damp cloth. Do not use abrasive cleaners or solvents.
- Rinse the pH probe thoroughly with distilled water after each use.
- For stubborn deposits on the pH probe, consult the probe's specific cleaning instructions.
8.2 Storage
- Always store the pH probe in its storage solution or a suitable buffer solution to prevent drying out. Never store dry.
- Store the meter in a cool, dry place when not in use.
- Remove batteries if storing for extended periods to prevent leakage.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display | Dead or incorrectly installed batteries. | Check battery polarity; replace batteries. |
| Unstable readings | Probe not immersed correctly; dirty probe; old buffer solutions; damaged probe. | Ensure proper immersion; clean probe; use fresh buffer solutions; replace probe if damaged. |
| Calibration error | Incorrect buffer solution; dirty probe; expired buffer. | Verify buffer values; clean probe; use fresh buffer solutions. |
10. Specifications
| Product Type | pH Meter |
| Meter Style | Portable |
| Display Type | LCD |
| pH Range | 0.00 to 14.00 pH |
| pH Resolution | 0.01 or 0.1 pH |
| pH Accuracy | ±0.01 pH |
| mV Range | ±1999 mV |
| mV Resolution | 1 mV |
| mV Accuracy | ±0.2 mV or 0.05% (whichever is greater) |
| Temperature Range | -10 to 110 °C |
| Temperature Compensation | Automatic (0 to 100 °C) |
| Buffer Recognition | NIST and USA |
| Calibration Points | Up to 5 points |
| Power Source | 4 AAA batteries |
| Battery Life | Approximately 700 hours |
| Dimensions (W x H) | 8.57 cm x 4.29 cm (3 3/8 in x 1 11/16 in) |
| Outer Material | Rubber (protective boot) |
11. Warranty Information
The Oakton AO-35613-22 pH 6+ Handheld Meter comes with a 3-year warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, accident, unauthorized modification, or improper storage of the pH probe.
12. Support and Contact
For technical assistance, troubleshooting beyond this manual, or warranty service, please contact Oakton customer support or visit the official Oakton website. Contact information can typically be found on the product packaging or the manufacturer's website.
Manufacturer: Cole-Parmer
Website: Visit the Oakton Store on Amazon
