1. Вовед
This manual provides detailed instructions for the Apera Instruments GroStar Series GS3 EC/ppm Pen Tester Kit (AI103G). This lab-grade conductivity meter is designed for accurate measurement of EC (Electrical Conductivity), 500ppm, and 700ppm, along with temperature, making it suitable for hydroponics and general water quality testing. The device features a replaceable titanium conductivity sensor and a user-friendly interface.
2. Производот завршиview
The GroStar Series GS3 EC/ppm Pen Tester is engineered for reliability and ease of use. Key features include:
- Measures conductivity (EC), 500ppm, 700ppm, and temperature.
- Replaceable titanium sensor for high accuracy in the 0 to 10 EC range.
- Backlit HD screen for clear readings.
- Grower-friendly calibration workflow with a calibration reminder function.

Figure 1: Apera Instruments GroStar Series GS3 EC/ppm Pen Tester.

Слика 2: Одблиску view of the durable titanium alloy sensor for conductivity measurements.

Figure 3: The GroStar GS3 Pen Tester demonstrating its water resistance during use.
3. Поставување
Before first use, ensure all components are present and the device is ready for operation.
3.1 Што има во кутијата
- Apera Instruments GroStar Series GS3 EC/ppm Pen Tester (Gen II)
- 2.77 EC Calibration Solution
- Ланјард
- 4 AAA batteries (pre-installed or included separately)

Figure 4: The complete kit contents, including the tester, calibration solution, and lanyard.
3.2 Инсталација на батерија
The device requires 4 AAA batteries. If not pre-installed, open the battery compartment located at the top of the tester, insert the batteries according to the polarity indicators, and securely close the compartment.
3.3 Почетна подготовка
- Отстранете го заштитното капаче од сензорот.
- Rinse the sensor with distilled or deionized water.
- Gently shake off excess water.
4. Упатства за работа
4.1 Вклучување/исклучување
Притиснете го МОЌ копче за вклучување или исклучување на тестерот.
4.2 Преземање на мерење
- Ensure the tester is clean and calibrated.
- Потопете го сензорот во sample solution, ensuring the sensor is fully submerged.
- Нежно промешајте и почекајте отчитувањето да се стабилизира на екранот.
- The display will show EC/ppm and temperature readings.
4.3 Switching Measurement Modes (EC/ppm)
Притиснете го MODE/UNITS button to cycle through EC, 500ppm, and 700ppm measurement modes.

Figure 5: The tester's display cycling through different measurement units.
4.4 Функција за задржување
Притиснете го ДРЖИ копче за замрзнување на моменталното отчитување на екранот. Притиснете повторно за да го ослободите.
4.5 TruRead Display
The TruRead display provides MAX, AVG, and MIN readings, offering a comprehensive view of your measurements.

Figure 6: The TruRead display feature, showing maximum, average, and minimum recorded values.
5. Калибрација
Regular calibration ensures accurate measurements. The GS3 features a grower-friendly calibration workflow and a reminder function.
5.1 Процес на калибрација
- Вклучете го тестерот.
- Притиснете го CAL копче за да влезете во режим на калибрација.
- Immerse the sensor into the 2.77 EC calibration solution.
- The tester will automatically recognize the solution and calibrate. Wait for the stable reading and confirmation.
- Rinse the sensor with distilled water after calibration.

Figure 7: Visual representation of the tester's display in measurement, calibration, and error states.
5.2 Calibration Reminder
The tester will automatically remind you when recalibration is due, ensuring consistent accuracy.
6. Одржување
6.1 Чистење на сензорот
After each use, rinse the sensor thoroughly with distilled or deionized water to prevent residue buildup. Do not scrub the sensor vigorously.
6.2 Складирање
Always replace the protective cap after use. For long-term storage, ensure the sensor is kept moist. Refer to the product packaging or Apera Instruments website for specific storage solution recommendations if applicable.
6.3 Замена на сензорот
The titanium EC sensor is replaceable. If the sensor performance degrades significantly or it becomes damaged, a new sensor can be purchased and easily installed by twisting off the old one and attaching the new one.
7 Смена на проблеми
| Проблем | Можна причина | Решение |
|---|---|---|
| Неточни читања | Sensor is dirty or dry; Calibration is outdated or incorrect; Damaged sensor. | Clean the sensor; Recalibrate the tester; Replace the sensor if damaged. |
| Tester does not power on | Dead batteries; Incorrect battery installation. | Заменете ги батериите; проверете ја поларноста на батериите. |
| "CAL Er" error during calibration | Incorrect calibration solution; Contaminated solution; Sensor issue. | Ensure correct 2.77 EC solution is used; Use fresh calibration solution; Clean or replace sensor. |
8. Спецификации
- Број на модел: AI103G
- Димензии на производот: 7 x 1.5 x 1.3 инчи
- Тежина: 4.69 унци
- Извор на енергија: 4 AAA батерии (вклучени)
- Тип на сензор: Replaceable Titanium EC Probe
- Мерни параметри: EC, 500ppm, 700ppm, Temperature
- Прв достапен датум: 28 септември 2022 година
9. Гаранција и поддршка
Apera Instruments products are backed by a manufacturer's warranty. For detailed warranty information, technical support, or to purchase replacement parts, please visit the official Apera Instruments webлокација или директно контактирајте ја нивната служба за корисници. Зачувајте ја сметката за купување за гаранциски барања.
Производител: Апера Инструменти





