Apera Instruments PH820 Benchtop pH Meter Kit

Product Overview

The Apera Instruments PH820 Benchtop pH Meter Kit is designed for reliable and accurate pH measurements in laboratory settings. It features advanced functionalities including intelligent calibration, data management, and a durable, water-resistant structure. This manual provides detailed instructions for proper use and care of your PH820 meter.

Figure 1: Apera Instruments PH820 Benchtop pH Meter Kit, showing the main unit, electrode, temperature probe, and electrode arm.

Key features of the PH820 include:

• High Accuracy: Achieves ±0.002 pH±1 digit precision.
• Premium Electrode: Equipped with the Swiss LabSen 211 Glass-body pH Electrode for stable and accurate measurements.
• Intelligent Calibration: Supports 1 to 5 points auto-calibration with calibration guide and reminder functions.
• Self-Diagnosis: Assists in identifying and resolving common calibration issues and monitors electrode health.
• Data Management: GLP-compliant data storage for up to 500 groups with USB data output and PC software support.
• Durable Design: IP54 water-resistant construction.

Setup

Unpacking and Component Check

Carefully unpack all components from the kit. Verify that the following items are present:

• PH820 pH Meter Unit
• LabSen 211 pH Electrode
• Temperature Probe
• Flexible Electrode Arm and Holder
• USB Cable
• PC-Link Software Flash Drive
• Power Adaptor (Input: 120V AC 60Hz; Output: 9V 300mA)
• Calibration Solutions (4.00 pH, 7.00 pH, 10.01 pH)

Connecting Components

Connect the electrode, temperature probe, and power adapter to the corresponding ports on the back of the PH820 meter unit. Ensure all connections are secure.

Figure 2: Rear view of the PH820 meter, highlighting the REF, pH/mV, TEMP, RS232, and DC 9V input ports.

1. Electrode Connection: Plug the LabSen 211 pH Electrode into the port labeled "pH/mV".
2. Temperature Probe Connection: Insert the temperature probe into the port labeled "TEMP".
3. Power Connection: Connect the power adapter to the "DC 9V" port and then to a power outlet.
4. Electrode Arm Assembly: Attach the flexible electrode arm and holder to the side of the meter unit for convenient electrode placement during measurements.

Operating Instructions

Basic pH Measurement

1. Power on the meter by pressing the power button.
2. Rinse the electrode with distilled water and gently blot dry.
3. Immerse the electrode and temperature probe into the sample solution. Ensure the electrode tip is fully submerged.
4. Wait for the reading on the large LCD to stabilize. The meter displays pH and temperature simultaneously.
5. Record the stable reading.

pH Calibration

The PH820 supports 1 to 5 points automatic calibration. Regular calibration ensures measurement accuracy.

1. Prepare the standard calibration solutions (4.00 pH, 7.00 pH, 10.01 pH are included).
2. Press the CAL button to enter calibration mode.
3. Rinse the electrode and immerse it into the first calibration solution (e.g., 7.00 pH).
4. The meter will automatically recognize the solution and begin calibration. Wait for the stability icon to appear.
5. Once stable, the meter will prompt for the next calibration point. Repeat the rinsing and immersion process for subsequent solutions.
6. The self-diagnosis function will provide feedback on the calibration process and electrode condition, including slope data.
7. Exit calibration mode once all desired points are completed.

Data Management

The PH820 allows for GLP data management, storing up to 500 groups of data. Data can be output via USB to a PC using the provided PC-Link software (Windows-based system only). Auto-timing data logging can also be configured.

ORP Measurement (Optional)

The PH820 can measure Oxidation-Reduction Potential (ORP) when an ORP electrode (e.g., 301Pt-C, sold separately) is connected to the pH/mV port. Refer to the ORP electrode's specific instructions for calibration and measurement procedures.

Maintenance

Electrode Care

Proper care of the LabSen 211 pH Electrode is crucial for maintaining accuracy and extending its lifespan.

Figure 3: Close-up view of the LabSen 211 pH Electrode, showing its glass body and sensor tip.

• Rinsing: Always rinse the electrode with distilled or deionized water before and after each measurement.
• Storage: Store the electrode in its protective cap filled with a suitable electrode storage solution (or 3M KCl solution). Never store the electrode dry or in distilled water.
• Cleaning: If the electrode becomes contaminated or readings are sluggish, clean it according to the electrode's specific cleaning instructions.
• Bubble-free Tip: The LabSen 211 features an impact-resistant and bubble-free sensor tip. Ensure no air bubbles are trapped around the sensor during measurement.

Meter Care

The PH820 meter unit is IP54 water-resistant, meaning it is protected from dust and splashing water. However, it should not be submerged. Keep the meter clean and dry. Use a soft, damp cloth to wipe the surface. Avoid using abrasive cleaners or solvents.

Troubleshooting

The PH820 features a self-diagnosis function that can assist in identifying and fixing common problems, particularly during calibration. Refer to the meter's display for diagnostic messages.

For persistent issues not resolved by the above, please contact Apera Instruments customer support.

Specifications

Warranty and Support

Apera Instruments products are manufactured under an ISO 9001:2015 certified quality system, ensuring high standards of production. For specific warranty information and technical support, please refer to the warranty card included with your product or visit the official Apera Instruments website. You may also contact their customer service directly for assistance with product operation, troubleshooting, or parts replacement.