Extech FL700 Fluoride Meter User Manual

1. Introdução

The Extech FL700 Fluoride Meter is a precision instrument designed for the rapid and accurate measurement of fluoride ions in various aqueous samples, including drinking water. This device integrates a sensing electrode, measurement electronics, and a digital display into a single, portable unit, making it suitable for both field and laboratory applications.

The FL700 provides direct readings of total fluoride concentrations ranging from 9.99 ppm or mg/L down to 0.1 ppm. It features automatic temperature compensation to ensure measurement accuracy across varying environmental conditions.

2. Informações de segurança

Please read and understand all safety precautions before operating the Extech FL700 Fluoride Meter. Failure to follow these instructions may result in injury or damage to the instrument.

• Always handle the fluoride electrode with care. Avoid touching the sensing element directly.
• When working with TISAB reagent tablets or any chemical solutions, wear appropriate personal protective equipment, including gloves and eye protection.
• Do not immerse the entire meter in liquid. The meter is designed for electrode immersion only.
• Store the meter and reagents in a cool, dry place, away from direct sunlight and extreme temperatures.
• Mantenha fora do alcance de crianças.

3. Produto acabadoview

The Extech FL700 Fluoride Meter is a compact and user-friendly device. Key components and features are outlined below:

Principais características:

• Calibração de dois pontos: Ensures accurate measurements across the fluoride range.
• Armazenamento de memória: Stores up to 25 labeled readings for later review.
• Field or lab testing: Designed for versatile use in various environments.
• Fast response: Provides fluoride measurements in less than 1 minute.
• Large dual LCD: Simultaneously displays ppm (or mg/L) and temperature with a bargraph.

4. Configuração

4.1. Instalação da bateria

The Extech FL700 requires four 3V button batteries (included). To install or replace batteries:

1. Twist off the battery compartment cap located at the top of the meter.
2. Insert the four 3V button batteries, ensuring correct polarity as indicated inside the compartment.
3. Replace the battery compartment cap and twist to secure.

4.2. Preparação Inicial

Before first use or after prolonged storage, prepare the electrode:

1. Remove the sensor cap from the electrode tip.
2. Rinse the electrode tip with distilled water.
3. Condition the electrode by immersing it in a fluoride standard solution (e.g., 1 ppm or 10 ppm) for approximately 15-30 minutes.

5. Instruções de operação

5.1. Ligar / desligar

Pressione o LIGADO/DESLIGADO Botão para ligar ou desligar o medidor.

5.2. Calibration (Two-Point)

Accurate calibration is crucial for reliable measurements. The FL700 supports two-point calibration.

1. Prepare two fluoride standard solutions, typically one low concentration (e.g., 1 ppm) and one high concentration (e.g., 10 ppm). Ensure the solutions are at a stable temperature.
2. Lave o eletrodo com água destilada e seque.
3. Immerse the electrode into the first standard solution.
4. Pressione e segure o CAL / RECALL button until 'CAL' appears on the display. The meter will automatically recognize the standard and calibrate. Wait for the reading to stabilize.
5. Rinse the electrode again and immerse it into the second standard solution.
6. Pressione e segure o CAL / RECALL button again. The meter will complete the two-point calibration.
7. The meter is now calibrated and ready for measurement.

5.3. Fazendo uma medição

To measure fluoride concentration in a sampem:

1. Certifique-se de que o medidor esteja calibrado.
2. Lave o eletrodo com água destilada e seque.
3. Add TISAB (Total Ionic Strength Adjustment Buffer) reagent to your sample according to the reagent instructions. TISAB ensures that the fluoride ions are in a measurable form and minimizes interference.
4. Immerse the electrode tip into the prepared sample solution. Ensure the tip is fully submerged.
5. Allow the reading to stabilize on the display. The large dual LCD will show the fluoride concentration in ppm (or mg/L) and the temperature.
6. To hold the current reading, press the MODE / HOLD botão. Pressione novamente para soltar.

5.4. Recuperando leituras armazenadas

The meter can store up to 25 labeled readings.

• To recall stored readings, press the CAL / RECALL button briefly when not in calibration mode.
• Use o MODE / HOLD button to scroll through the stored readings.

6. Manutenção

6.1. Limpeza do eletrodo

Regular cleaning of the electrode ensures optimal performance.

• Após cada utilização, enxágue bem o eletrodo com água destilada.
• If the electrode becomes fouled or readings become erratic, clean it with a mild detergent solution or a specialized electrode cleaning solution. Rinse thoroughly with distilled water afterward.

6.2. Armazenamento

Proper storage extends the life of the electrode and meter.

• Always replace the sensor cap on the electrode tip when not in use. The cap should contain a small amount of electrode storage solution or a fluoride standard solution to keep the membrane hydrated. Do not store dry.
• Armazene o medidor em um local fresco e seco.

6.3. Substituição da bateria

Replace batteries when the low battery indicator appears on the display or when the meter fails to power on. Refer to Section 4.1 for battery installation instructions.

7. Solução De Problemas

8. Especificações

9. Informações de garantia

The Extech FL700 Fluoride Meter comes with a full one-year warranty on parts and workmanship, unless otherwise specified. This warranty does not cover defects resulting from user actions such as misuse, improper wiring, operation outside of specified parameters, improper maintenance or repair, or unauthorized modification.

10. Suporte

For technical support, service, or additional information, please visit the official Extech website ou entre em contato com o departamento de atendimento ao cliente. Você também pode encontrar mais informações e produtos no Loja Extech na Amazon.