1. Úvod
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. Produkt skončilview
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.

Obrázok 2: Detailný záber view of the durable titanium alloy sensor for conductivity measurements.

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

Figure 4: The complete kit contents, including the tester, calibration solution, and lanyard.
3.2 Inštalácia batérie
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 Počiatočná príprava
- Odstráňte ochranný kryt zo snímača.
- Rinse the sensor with distilled or deionized water.
- Gently shake off excess water.
4. Návod na obsluhu
4.1 Zapnutie/vypnutie
Stlačte tlačidlo POWER button to turn the tester on or off.
4.2 Meranie
- Ensure the tester is clean and calibrated.
- Ponorte snímač do samproztoku a uistite sa, že senzor je úplne ponorený.
- Stir gently and wait for the reading to stabilize on the display.
- The display will show EC/ppm and temperature readings.
4.3 Switching Measurement Modes (EC/ppm)
Stlačte tlačidlo 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 Funkcia Hold
Stlačte tlačidlo PODRŽAŤ tlačidlo na zmrazenie aktuálnej hodnoty na displeji. Opätovným stlačením tlačidlo uvoľníte.
4.5 TruRead Display
The TruRead display provides MAX, AVG, and MIN readings, offering a comprehensive view vašich mier.

Figure 6: The TruRead display feature, showing maximum, average, and minimum recorded values.
5. Kalibrácia
Regular calibration ensures accurate measurements. The GS3 features a grower-friendly calibration workflow and a reminder function.
5.1 Proces kalibrácie
- Zapnite tester.
- Stlačte tlačidlo CAL tlačidlo pre vstup do kalibračného režimu.
- 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. Údržba
6.1 Čistenie snímača
After each use, rinse the sensor thoroughly with distilled or deionized water to prevent residue buildup. Do not scrub the sensor vigorously.
6.2 Skladovanie
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 Výmena snímača
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. Riešenie problémov
| Problém | Možná príčina | Riešenie |
|---|---|---|
| Nepresné údaje | Sensor is dirty or dry; Calibration is outdated or incorrect; Damaged sensor. | Clean the sensor; Recalibrate the tester; Replace the sensor if damaged. |
| Tester sa nezapne | Vybité batérie; Nesprávna inštalácia batérií. | Vymeňte batérie; Skontrolujte polaritu batérií. |
| "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. Špecifikácie
- Číslo modelu: AI103G
- Rozmery produktu: 7 x 1.5 x 1.3 palca
- Hmotnosť: 4.69 uncí
- Zdroj napájania: 4 AAA batérie (súčasť balenia)
- Typ snímača: Replaceable Titanium EC Probe
- Parametre merania: EC, 500ppm, 700ppm, Temperature
- Prvý dostupný dátum: 28. septembra 2022
9. Záruka a podpora
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 webalebo sa priamo obráťte na ich zákaznícky servis. Uschovajte si doklad o kúpe pre prípad reklamácie.
Výrobca: Apera Instruments