Producte acabatview
The Extech MG320 is a versatile instrument combining a portable 20GΩ/1000V insulation tester with a True RMS multimeter. It is designed for professionals needing to perform insulation resistance measurements and general electrical troubleshooting.
Key features include Polarization Index (PI) and Dielectric Absorption Ratio (DAR) modes, a programmable timer for test duration, and a comparator function for setting custom pass/fail criteria. The device offers 5 test voltage ranges and includes high voltage and overload indication for safety. It is rated CAT IV 600V for enhanced safety.
The MG320 allows for manual storage and recall of up to 99 readings, making it suitable for field use where data logging is required. It comes complete with test leads, an alligator clip, 6 AA batteries, and a soft carrying case.
Figura 1: Frontal view of the Extech MG320 Insulation Tester, showing the display, function dial, and input terminals.
Informació de seguretat
Always adhere to local and national safety codes. Use personal protective equipment (PPE) as required. Ensure the device is in good working condition before use. Do not attempt to measure voltages or currents exceeding the specified maximum ratings.
- CAT IV 600V Safety Rating: This instrument is designed for measurements at the source of the low-voltage instal·lació, com ara comptadors d'electricitat i dispositius primaris de protecció contra sobreintensitat.
- Inspect test leads for damage before each use.
- No feu funcionar el mesurador si sembla danyat o si la carcassa està oberta.
- Always disconnect power to the circuit under test before making connections for resistance or continuity measurements.
- Tingueu en compte l'alt voltage during insulation tests.
Configuració
Instal·lació de la bateria
The Extech MG320 requires 6 AA batteries for operation. To install or replace batteries:
- Assegureu-vos que el comptador estigui apagat.
- Localitzeu el compartiment de la bateria a la part posterior de la unitat.
- Feu servir un tornavís per obrir la tapa del compartiment de la bateria.
- Insert 6 AA batteries, observing correct polarity (+/-).
- Substituïu la tapa del compartiment de la bateria i fixeu-la amb el cargol.
Connexió de cables de prova
Connect the red test lead to the VΩ input terminal and the black test lead to the COM input terminal for most measurements. For insulation tests, connect the red lead to the V INSULATION terminal and the black lead to the EARTH terminal.
Instruccions de funcionament
Mesura de la resistència d'aïllament
The MG320 offers 5 test voltage ranges for insulation resistance. Always ensure the circuit under test is de-energized before performing insulation tests.
- Turn the rotary switch to one of the INSULATION TEST voltage ranges (50V, 100V, 250V, 500V, 1000V).
- Connect the test leads to the circuit or component to be tested.
- Premeu el botó PROVA button to initiate the insulation test. The display will show the resistance value.
- Allibera el PROVA button to stop the test.
True RMS Multimeter Functions
The MG320 also functions as a True RMS multimeter for various electrical measurements.
- VoltagMesura (CA/CC): Turn the rotary switch to the V~ (AC) or V- (DC) position. Connect test leads in parallel with the circuit.
- Resistance Measurement (Ω): Turn the rotary switch to the Ω position. Ensure the circuit is de-energized. Connect test leads across the component.
- Prova de continuïtat: Turn the rotary switch to the continuity position. A built-in buzzer will sound if continuity is detected.
Figure 2: An electrician using the Extech MG320 to perform measurements within an electrical panel, demonstrating its application in industrial settings.
Figure 3: A technician conducting tests on industrial piping using the Extech MG320, highlighting its use in maintenance and troubleshooting.
Manteniment
Neteja
Wipe the meter with a dry, clean cloth. Do not use abrasives or solvents. Keep the display clean for optimal readability.
Canvi de bateria
Replace batteries when the low battery indicator appears on the display to ensure accurate measurements. Refer to the "Battery Installation" section under Setup for detailed instructions.
Emmagatzematge
If the meter is not used for an extended period, remove the batteries to prevent leakage and damage. Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
Resolució de problemes
| Problema | Causa possible | Solució |
|---|---|---|
| El mesurador no s'encén. | Piles gastades o instal·lades incorrectament. | Comproveu la polaritat de la bateria; substituïu les piles. |
| Lectures inexactes. | Low battery, incorrect function selected, damaged test leads. | Replace batteries, verify function setting, inspect and replace test leads if damaged. |
| Es mostra "OL" o sobrecàrrega. | La mesura supera l'abast del mesurador. | Select a higher range or ensure the measurement is within the meter’s capabilities. |
Especificacions
| Especificació | Detall |
|---|---|
| Marca | Extech |
| Model | MG320 |
| Gamma de resistència d'aïllament | Up to 20 GΩ |
| Prova Voltages | 50V, 100V, 250V, 500V, 1000V |
| Tipus de multímetre | RMS veritable |
| Classificació de seguretat | CAT IV 600V |
| Font d'alimentació | 6 piles AA (incloses) |
| Pes de l'article | 1.2 lliures (aprox. 0.54 kg) |
| Dimensions (L x A x A) | 4 x 9 x 2.5 polzades (aprox. 10.16 x 22.86 x 6.35 cm) |
| Components inclosos | Test leads, alligator clip, 6 AA batteries, soft case |
Garantia i Suport
For warranty information and technical support, please refer to the official Extech website or contact Extech customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.
Extech Contact Information:
- Weblloc: www.extech.com
- Suport: Consulteu el weblloc web per a contactes de suport regional.
