1. Introduction
The Yieryi PH-80 is a professional digital meter designed for accurate measurement of pH levels and temperature in various water sources. Featuring a large digital display, highly sensitive glass bulb electrode, and user-friendly functions like data lock and automatic shut-off, it is an essential tool for monitoring water quality in applications such as drinking water, swimming pools, aquariums, fish tanks, hydroponics, and agriculture.
2. Package Contents
Please check the package carefully to ensure all items are present:
- 1 x PH-80 PH/TEMP Meter
- 1 x User's Guide (Instructions)
- 1 x PH 7.0 Calibration Buffer Solution (20ml)
- 1 x Electrode Protection Liquid
- 1 x Packing Box
3. Specifications
| Parameter | Value |
|---|---|
| PH Range | 0.0 - 14.0 |
| Temperature Range | 0 - 55°C (32 - 130°F) |
| Display Type | Digital (with Backlight) |
| Electrode Type | Highly Sensitive Glass Bulb Electrode |
| Battery Type | 3 x 1.5V LR44 Button Cell Batteries (Not Included) |
| Dimensions | 31mm x 155mm |
| Features | Data Lock, Automatic Shut-off, Temperature Conversion (°C/°F) |
| Certification | CE |
4. Product Overview
Familiarize yourself with the components and controls of your PH-80 meter:
- Display: Shows PH and temperature readings.
- POWER/ENTER Key: Turns the device ON/OFF and confirms selections.
- TEMP/CAL Key: Toggles between Celsius and Fahrenheit, and initiates calibration mode.
- HOLD Key: Locks the current reading on the display.
- Battery Compartment: Located at the top, for LR44 button cell batteries.
- Probe: The sensing element, featuring a highly sensitive glass bulb electrode.
5. Setup
5.1 Battery Installation
- Locate the battery compartment at the top of the meter.
- Twist or slide open the battery compartment cover.
- Insert three 1.5V LR44 button cell batteries, ensuring correct polarity.
- Close the battery compartment cover securely.
5.2 Initial Preparation
- Remove the protective cap from the electrode.
- Rinse the electrode with distilled water before first use.
6. Operating Instructions
6.1 Power On/Off
- Press the POWER/ENTER button to turn the meter ON.
- Press and hold the POWER/ENTER button to turn the meter OFF.
6.2 Taking a Measurement
- Ensure the meter is ON.
- Immerse the electrode into the sample solution up to the immersion line.
- Gently shake the meter to remove any air bubbles.
- Wait for the reading to stabilize on the digital display. The display will show both PH and temperature.
6.3 Temperature Conversion (°C/°F)
- While the meter is ON, press the TEMP/CAL button to switch between Celsius (°C) and Fahrenheit (°F) temperature units.
6.4 Data Lock (HOLD Function)
- During measurement, press the HOLD button to freeze the current reading on the display.
- Press the HOLD button again to release the reading and resume live measurement.
6.5 Automatic Shut-off
The meter features an automatic shut-off function to conserve battery life. If no operation is performed for a certain period, the meter will automatically turn off.
7. Calibration
Regular calibration ensures the accuracy of your PH meter. It is recommended to calibrate the meter before first use, after prolonged storage, or if you suspect inaccurate readings.
- Prepare the PH 7.0 calibration buffer solution provided (or other standard buffer solutions like PH 4.0 or PH 10.0 if needed for your application range).
- Turn on the meter.
- Immerse the electrode into the PH 7.0 buffer solution.
- Press and hold the TEMP/CAL button until the display enters calibration mode (this may be indicated by a flashing reading or 'CAL' on the screen).
- The meter will automatically recognize the buffer solution and calibrate itself. Wait for the reading to stabilize and the calibration indicator to confirm completion.
- Rinse the electrode with distilled water and dry gently.
- For higher accuracy, you may perform a two-point or three-point calibration using PH 4.0 and PH 10.0 buffer solutions after calibrating with PH 7.0.
8. Maintenance
8.1 Electrode Care
- Always rinse the electrode with distilled water after each use to remove any residue.
- Keep the electrode moist. Store the electrode in the provided electrode protection liquid or a small amount of PH storage solution (never distilled water) when not in use.
- Ensure the protective cap is securely placed over the electrode during storage.
8.2 Cleaning
- Wipe the body of the meter with a clean, damp cloth. Do not use abrasive cleaners or solvents.
- Avoid submerging the entire meter in water, only the electrode is waterproof.
8.3 Storage
- Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures.
- Ensure the electrode is properly stored in protection liquid with the cap on.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not turn on | Dead batteries or incorrect battery installation. | Check battery polarity and replace batteries if necessary. |
| Inaccurate readings | Electrode not clean, not calibrated, or damaged. | Clean the electrode, perform calibration, or replace the electrode if damaged. |
| Slow response time | Electrode dry or contaminated. | Ensure electrode is kept moist in storage solution. Clean the electrode thoroughly. |
| Display shows 'Err' or '---' | Measurement out of range or sensor error. | Ensure the sample is within the meter's PH range. Recalibrate the meter. |
10. User Tips
- Wide Application: This PH meter is highly versatile and can be effectively utilized for testing water quality in hydroponics systems, swimming pools, aquariums, and general drinking water analysis.
- Regular Calibration: For consistent accuracy, especially in critical applications, perform calibration regularly, ideally before each series of measurements or at least once a week.
- Electrode Hydration: Always ensure the electrode is kept moist with the provided protection liquid or a dedicated PH storage solution to prolong its lifespan and maintain accuracy.
11. Warranty and Support
The Yieryi PH-80 meter is manufactured to high-quality standards. For any technical support or warranty inquiries, please refer to the contact information provided by your retailer or the official Yieryi website. Keep your purchase receipt as proof of purchase.
