1. Johdanto
This manual provides essential information for the safe and effective use of the Testo 750-2 Voltage Tester. Please read these instructions thoroughly before operating the device. Proper use ensures accurate measurements and user safety.
The Testo 750-2 is a robust voltage tester designed for electrical professionals. It features a clear LED display for voltage indication, continuity testing, phase rotation detection, and a built-in flashlight for use in dimly lit environments. It also includes GFCI trip functionality.
2. Turvallisuustiedot
WARNING: Electrical shock hazard. Failure to follow these instructions may result in serious injury or death.
- Always verify the tester's functionality on a known live source before and after use.
- Älä käytä testeriä, jos se näyttää vaurioituneelta tai ei toimi oikein.
- Adhere to all local and national safety regulations for electrical work.
- Käytä asianmukaisia henkilönsuojaimia, kuten eristettyjä käsineitä ja suojalaseja.
- Älä ylitä enimmäistilavuuttatage ratings specified for the device.
- Vältä työskentelyä yksin sähkömittauksia tehdessäsi.
- Pidä sormet mittausjohtojen sormisuojien takana käytön aikana.
3. Pakkauksen sisältö
Varmista, että kaikki osat ovat mukana ja vahingoittumattomia purkaessasi pakkauksesta:
- Testo 750-2 Voitage Testaaja
- 2 x AAA-paristoa (esiasennettu tai toimitetaan erikseen)
- Käyttöopas (tämä asiakirja)
4. Tuote ohiview
The Testo 750-2 Voltage Tester consists of two main units connected by a flexible cable. Each unit houses a test probe and controls.

Kuva 1: Edessä view of the Testo 750-2 Voltage Tester. Shows the two main units, test probes (L1, L2), and the LED display indicating voltage levels (12V to 690V AC/DC), continuity (Rx), and phase rotation (L/R).

Kuva 2: Kulma view of the Testo 750-2 Voltage Tester, highlighting its ergonomic design and the integrated flashlight button on the left unit.

Kuva 3: Takaosa view of the Testo 750-2 Voltage Tester, showing safety markings and product information.

Kuva 4: Lähikuva view of the Testo 750-2 display and controls, showing the voltage indicator LEDs, continuity indicator, phase rotation indicators (L/R), and the flashlight button.
Tärkeimmät komponentit:
- Test Probes (L1, L2): Sähköpiirien koskettamiseen.
- LED-näyttö: Osoittaa voltage levels (AC/DC), continuity, and phase rotation.
- Taskulamppupainike: Aktivoi sisäänrakennetun taskulampun.
- GFCI-testipainike: Initiates a GFCI trip test.
- Akkulokero: Located on the rear of one unit.
5. Asennus
5.1. Akun asennus
The Testo 750-2 requires 2 AAA batteries for operation. These are typically included.
- Locate the battery compartment cover on the rear of the tester.
- Use a suitable tool (e.g., a small screwdriver) to open the compartment.
- Aseta 2 AAA-paristoa lokeroon ja huomioi oikea napaisuus (+/-) lokeron sisällä olevien merkkien mukaisesti.
- Sulje paristolokeron kansi kunnolla.
The device will perform a self-test upon battery installation or when first used, indicated by all LEDs briefly illuminating.
6. Käyttöohjeet
6.1. Voitage Testing (AC/DC)
Mittaa voltage:
- Ensure the tester is clean and undamaged.
- Connect the L1 and L2 test probes to the points where voltage on mitattava.
- The LED display will illuminate to indicate the detected voltage level (e.g., 12V, 24V, 50V, 120V, 230V, 400V, 690V).
- DC voltage, the polarity will also be indicated (+/-).
- An audible signal will sound when voltage havaitaan.
Note: The Testo 750-2 is designed to provide a clear indication of voltage presence even with discharged batteries, ensuring safety.
6.2. Jatkuvuuden testaus
To test for continuity (low resistance):
- Ensure the circuit or component is de-energized before testing for continuity.
- Connect the L1 and L2 test probes across the circuit or component.
- If continuity is detected (resistance below a certain threshold), the "Rx" LED will illuminate, and an audible signal will sound.
6.3. Phase Rotation Testing
To determine phase rotation in three-phase systems:
- Connect the L1 probe to the first phase (e.g., L1).
- Connect the L2 probe to the second phase (e.g., L2).
- The "L" or "R" LED will illuminate to indicate the direction of the rotating magnetic field (left or right).
- For a complete three-phase test, connect the L1 probe to L1, L2 probe to L2, then L1 probe to L2, L2 probe to L3, and finally L1 probe to L3, L2 probe to L1, observing the sequence.
6.4. GFCI Trip Test
To test Ground Fault Circuit Interrupter (GFCI) functionality:
- Connect the L1 and L2 test probes to the live and ground terminals of the GFCI-protected outlet or circuit.
- Press and hold the GFCI test button on the tester.
- The GFCI device should trip, interrupting power to the outlet/circuit.
- Release the button and reset the GFCI device.
CAUTION: This test will temporarily cut power to the circuit. Ensure no critical equipment is connected or that appropriate precautions are taken.
6.5. Sisäänrakennettu taskulamppu
To activate the flashlight, press the flashlight button located on one of the tester units. Press again to turn it off. This feature is useful for illuminating dark work areas.
7. Huolto
7.1. Puhdistus
Clean the tester regularly with a damp liinalla. Älä käytä hankaavia puhdistusaineita tai liuottimia. Varmista, että laite on kuiva ennen säilytystä tai seuraavaa käyttökertaa.
7.2. Pariston vaihto
When the battery low indicator appears (if applicable) or the device's performance degrades, replace the batteries as described in Section 5.1. Always use new AAA batteries of the same type.
7.3. Varastointi
Store the tester in a dry, clean environment, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries to prevent leakage.
8. Vianmääritys
- No Indication / Device Not Turning On:
- Tarkista paristojen asennus ja napaisuus.
- Vaihda paristot uusiin.
- Ensure probes are making good contact with the test points.
- Epäjohdonmukaiset lukemat:
- Verify the tester on a known live source.
- Check for damaged test leads or probes.
- Ensure proper contact with the circuit.
- GFCI Test Not Tripping:
- Ensure the GFCI outlet/circuit is properly wired and functional.
- Confirm the tester is connected correctly (live to ground).
- If the GFCI still does not trip, the GFCI device itself may be faulty and requires inspection by a qualified electrician.
If problems persist, contact Testo customer support.
9. Tekniset tiedot
| Ominaisuus | Erittely |
|---|---|
| Mallinumero | 0590 7502 |
| Voitage Alue | 12V to 690V AC/DC |
| Jatkuvuustesti | Yes (audible and visual) |
| Vaiheen kiertotesti | Yes (L/R indication) |
| GFCI Trip Function | Kyllä |
| Taskulamppu | Sisäänrakennettu |
| Virtalähde | 2 x AAA-paristot (mukana) |
| Tuotteen mitat (P x L x K) | 10.63 x 2.56 x 1.38 tuumaa |
| Tuotteen paino | 9.17 unssia (260 grammaa) |
| Valmistaja | Testo, Inc. |
| Alkuperämaa | Yhdysvallat |
10. Takuutiedot
Testo, Inc. products are manufactured to high-quality standards. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Testo websivusto. Säilytä ostokuitti takuuvaatimuksia varten.
11. Tuki ja yhteydenotto
For technical support, service, or further information regarding your Testo 750-2 Voltage Tester, please contact Testo, Inc. directly:
- Websivusto: www.testo.com
- Refer to the official Testo websivusto alueellisille yhteystiedoille ja tukiresursseille.