Produkt overview
The Mastech MAS830L is a compact and versatile digital multimeter designed for basic electrical measurements. It features a clear LCD display and a rotary switch for selecting various functions, making it suitable for hobbyists and general household use.
This image displays the Mastech MAS830L Digital Multimeter. The device features a green protective casing and a black front panel. At the top, there is a large LCD display showing '-1.8.8.8'. Below the display, a green 'HOLD' button is visible on the left, and a yellow 'BACK LIGHT' button on the right. The central part is dominated by a large black rotary switch with various measurement ranges and functions, including DC Voltage (V-), AC Voltage (V~), DC Current (A-), Resistance (Ω), Diode Test, Continuity Test, and Hfe. At the bottom, there are three input jacks labeled '10A', 'COM', and 'mA V Ω', with corresponding safety warnings for fused inputs. The brand 'MASTECH' and model 'MAS830L' are printed at the very bottom.
Sikkerhedsoplysninger
Overhold altid grundlæggende sikkerhedsforanstaltninger ved brug af elektrisk testudstyr for at reducere risikoen for brand, elektrisk stød eller personskade.
- Påfør ikke mere end den nominelle voltage, som markeret på måleren, mellem terminaler eller mellem enhver terminal og jord.
- Vær yderst forsigtig, når du arbejder med voltagover 30V AC RMS, 42V peak eller 60V DC. Sådanne lydstyrkertages udgør en stødfare.
- Before measuring current, ensure the meter's fuses are intact and the test leads are connected to the correct input jacks.
- Always disconnect the test leads from the circuit before changing the function or range switch.
- Brug ikke måleren, hvis den ser beskadiget ud, eller hvis beskyttelsespladerneasing er kompromitteret.
- Udskift batteriet med det samme, når indikatoren for lavt batteri vises, for at sikre nøjagtige aflæsninger.
Opsætning
1. Batteriinstallation
The Mastech MAS830L requires one 9V battery (6F22 type) for operation.
- Ensure the multimeter is turned SLUKKET.
- Find batteridækslet på bagsiden af enheden.
- Skru fastholdelsesskruen(e) af, og fjern dækslet.
- Connect a 9V battery to the battery clip, observing correct polarity (+ and -).
- Placer batteriet i batterirummet, og sæt dækslet på igen, og fastgør det med skruen/skruerne.
2. Tilslutning af testledninger
Korrekt tilslutning af testledninger er afgørende for nøjagtige og sikre målinger.
- The black test lead should always be connected to the KOM (Fælles) indgangsstik.
- For de fleste målinger (Vol.tage, Resistance, Diode, Continuity, Hfe, and low current), connect the red test lead to the VΩmA indgangsstik.
- For high current measurements (up to 10A), connect the red test lead to the 10A indgangsstik.
Betjeningsvejledning
Before taking any measurement, ensure the test leads are correctly inserted into the appropriate input jacks and the rotary switch is set to the desired function and range.
1. DC Voltage Measurement (V-)
- Connect the red lead to VΩmA and the black lead to KOM.
- Indstil drejekontakten til den ønskede DC-volumentage range (200m, 2, 20, 200, 600V). Select a range higher than the expected voltage.
- Tilslut testproberne over DC-volumentage kilde, der skal måles.
- Displayet vil vise voltage reading. If a negative sign appears, it indicates reversed polarity.
2. AC Voltage Måling (V~)
- Connect the red lead to VΩmA and the black lead to KOM.
- Indstil drejekontakten til den ønskede AC-volumentage range (200, 600V). Select a range higher than the expected voltage.
- Tilslut testproberne på tværs af AC-volumentage kilde, der skal måles.
- Displayet vil vise AC voltage læsning.
3. DC Current Measurement (A-)
- Tilslut den sorte ledning til KOM.
- For currents up to 200mA, connect the red lead to VΩmA. For currents up to 10A, connect the red lead to 10A.
- Set the rotary switch to the desired DC Current range (200μ, 2m, 20m, 200m, 10A).
- FORSIGTIGHED: Disconnect power to the circuit before connecting the meter in series.
- Connect the meter in series with the circuit where current is to be measured.
- Apply power to the circuit. The display will show the DC current reading.
4. Modstandsmåling (Ω)
- Connect the red lead to VΩmA and the black lead to KOM.
- Set the rotary switch to the desired Resistance range (200, 2k, 20k, 200k, 2MΩ).
- FORSIGTIGHED: Sørg for, at kredsløbet er spændingsløst, og at alle kondensatorer er afladede, før modstanden måles.
- Tilslut testproberne på tværs af den komponent, der skal måles.
- Displayet vil vise modstandsaflæsningen.
5. Diodetest (symbol for diode)
- Connect the red lead to VΩmA and the black lead to KOM.
- Indstil drejekontakten til diodetestpositionen.
- Forbind den røde probe til anoden og den sorte probe til katoden på dioden.
- Displayet viser den fremadrettede lydstyrketage drop. Reverse the probes; the display should show 'OL' (Overload) for a good diode.
6. Kontinuitetstest (symbol for continuity/buzzer)
- Connect the red lead to VΩmA and the black lead to KOM.
- Indstil drejekontakten til positionen for gennemgangstest.
- Connect the test probes across the circuit or component to be tested.
- If the resistance is below approximately 50Ω, the built-in buzzer will sound, indicating continuity.
7. Hfe Test (Transistor Gain)
- Set the rotary switch to the Hfe position.
- Identificer om transistoren er NPN eller PNP.
- Insert the transistor leads (Emitter, Base, Collector) into the corresponding holes in the Hfe socket on the meter.
- The display will show the Hfe value (DC current gain) of the transistor.
8. Data Hold Function (HOLD button)
- Tryk på HOLDE knappen for at fryse den aktuelle aflæsning på displayet.
- Tryk på HOLDE knappen igen for at afslutte aflæsningen og genoptage livemålingen.
9. Backlight Function (BACK LIGHT button)
- Tryk på BAGAGELYS button to illuminate the display for better visibility in low-light conditions.
- The backlight will automatically turn off after approximately 8 seconds to conserve battery life.
Opretholdelse
1. Udskiftning af batteri
Når batteriet voltage drops below the operating level, the battery symbol will appear on the display. Replace the battery as described in the "Setup" section.
2. Udskiftning af sikring
The meter is protected by fuses. If the current measurement function fails, the fuse may need replacement. Refer to the specifications for fuse ratings.
- Ensure the multimeter is turned SLUKKET and test leads are disconnected.
- Unscrew the back cover of the meter.
- Carefully remove the old fuse and replace it with a new one of the correct type and rating.
- Sæt bagdækslet sikkert på igen.
3. Rengøring og opbevaring
- Tør sagen af med annonceamp klud og mildt rengøringsmiddel. Brug ikke slibemidler eller opløsningsmidler.
- If the meter is not to be used for a long period, remove the battery to prevent leakage.
- Opbevar måleren et køligt, tørt sted, væk fra direkte sollys og ekstreme temperaturer.
Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Intet display eller svagt display | Tæt eller lavt batteri | Udskift 9V batteriet. |
| Forkerte aflæsninger | Incorrect range selected; Poor test lead connection; Low battery | Select appropriate range; Ensure leads are firmly connected; Replace battery. |
| Strømmåling virker ikke | Sprunget sikring | Check and replace the fuse(s) if necessary. |
| "OL" (Overbelastning) vises | Input value exceeds selected range; Open circuit (for continuity/resistance) | Select a higher range; Check circuit for breaks. |
Specifikationer
- Vise: 1999 Counts, 15mm high digit LCD
- DC bindtage: 200mV / 2V / 20V / 200V (±0.5%), 600V (±0.8%)
- AC Voltage: 200V / 600V (±1.2%)
- DC-strøm: 200μA / 2mA / 20mA (±1.0%), 200mA (±1.5%), 10A (±3.0%)
- Modstand: 200Ω / 2kΩ / 20kΩ / 200kΩ (±0.8%), 2MΩ (±1.0%)
- Hfe: 1 - 1000
- Diode test: Ja
- Data Hold: Ja
- Baggrundsbelysning: Yes (approx. 8 seconds duration)
- Kontinuitetstest: Yes (with buzzer)
- Magt: 1 x 9V battery (6F22)
- Dimensioner: 138 mm x 69 mm x 31 mm (5.7 x 3 x 1.57 tommer)
- Vægt: Ca. 170 g (5.87 ounces)
Garanti og support
Mastech products are designed for reliability and performance. For any technical assistance, warranty inquiries, or support, please contact Mastech customer service through their official webwebsted eller autoriserede distributører.
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