PH 18 - Measurement PCE Instruments - Free user manual and instructions
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| Product Type | Portable pH Meter |
| Brand | PCE Instruments |
| Model | PH 18 |
| Measurement Range | 0.00 to 14.00 pH |
| Resolution | 0.01 pH |
| Accuracy | ±0.02 pH |
| Calibration | Automatic one-, two-, or three-point calibration |
| Display | LCD with backlight |
| Power Supply | 2 x 1.5V AAA batteries |
| Battery Life | Approximately 200 hours of continuous use |
| Auto Power Off | Yes, after 10 minutes of inactivity |
| Dimensions | 185 x 40 x 28 mm |
| Weight | 85 g (including batteries) |
| Electrode | Replaceable pH electrode with BNC connector |
| Temperature Compensation | Automatic (ATC) from 0 to 50 °C |
| Operating Temperature | 0 to 50 °C |
| Storage Temperature | -10 to 60 °C |
| Water Resistance | IP67 (dust and temporary immersion) |
| Included Accessories | pH electrode, calibration solutions (pH 4.00, 7.00, 10.00), batteries, carrying case |
| Maintenance | Rinse electrode with distilled water after use; store in storage solution |
| Safety | CE certified; follow instructions for battery disposal |
| Repairability | Electrode and batteries replaceable; consult manual for service |
Frequently Asked Questions - PH 18 PCE Instruments
How do I calibrate the PCE Instruments PH 18?
To calibrate, immerse the electrode in a buffer solution (e.g., pH 7.00) and hold the CAL button until the display flashes. Use the up/down keys to set the correct value, then press CAL again. Repeat for other buffers if needed.
What type of batteries does the PH 18 use?
The PH 18 uses two 1.5V AAA batteries. Open the battery compartment on the back, insert batteries with correct polarity, and close the cover.
Can I replace the pH electrode?
Yes, the electrode is replaceable. Unscrew the old electrode, connect the new one via the BNC connector, and calibrate before use.
What is the accuracy of the PH 18?
The accuracy is ±0.02 pH after proper calibration. This ensures reliable measurements for most applications.
How do I clean the electrode?
Rinse the electrode with distilled water after each measurement. For stubborn deposits, soak in a cleaning solution (e.g., 0.1M HCl) for 10 minutes, then rinse.
What does ATC mean?
ATC stands for Automatic Temperature Compensation. The meter adjusts pH readings based on the temperature of the solution, ensuring accuracy.
Why does the display show 'Err'?
An 'Err' message indicates a measurement error. Common causes: electrode not immersed, broken electrode, or out-of-range pH. Check the electrode and recalibrate.
Is the PH 18 waterproof?
The PH 18 has an IP67 rating, meaning it is dust-tight and can be submerged in up to 1 meter of water for 30 minutes. However, avoid prolonged submersion.
How often should I calibrate?
Calibrate daily before use, or whenever accuracy is in doubt. More frequent calibration is needed when measuring extreme pH values or after electrode replacement.
What should I do if the meter turns off automatically?
The meter has an auto power-off feature after 10 minutes of inactivity. Press the POWER button to turn it back on. To disable, hold the MODE key during startup.
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