Pukapuka Kaiwhakamahi mō te Mita Maha Mamati Mastech MS8251A

1. Kupu Whakataki

Mauruuru koe mo te hokoasing the Mastech MS8251A Digital Multimeter. This device is a portable, professional measuring instrument with a large LCD display, providing clear and easy-to-read results. It is designed for use in laboratories, factories, and homes, offering a wide range of functions including AC/DC voltage, AC/DC current, resistance, capacitance, frequency, duty cycle, temperature, diode, continuity, and non-contact voltagte kimi (NCV).

Please read this manual thoroughly before using the meter to ensure safe and proper operation. Keep this manual for future reference.

2. Nga korero haumaru

WHAKATŪPATO: To avoid possible electric shock or personal injury, and to avoid possible damage to the meter or to the equipment under test, follow these instructions:

• Always ensure the meter is in the correct function and range for the measurement being performed.
• Kaua e tono nui ake i te reiti voltage, kua tohuhia ki te mita, i waenga i nga pito, i waenga ranei i tetahi tauranga me te whenua whenua.
• Kia tūpato me te voltagkei runga ake i te 30V AC RMS, te tihi 42V, te 60V DC ranei. Ko enei voltaghe morearea ohorere.
• Before making current measurements, ensure the meter's fuses are intact and the test leads are connected to the correct input jacks.
• Disconnect the circuit power and discharge all high-voltage pūnga pūnga i mua i te whakamatautau i te ātete, te haere tonu, te diodes, te kaha ranei.
• Do not use the meter if it is damaged or if the case (or part of the case) is removed. Inspect the meter before use.
• Kaua e mahi i te mita huri noa i te hau pahū, te kohu, te puehu ranei.
• I te wa e mahi ana i te mita, whakamahia nga waahanga whakakapinga kua tohua.
• Always use approved test leads.
• Do not use the meter if the battery cover is not properly closed.
• Tangohia ngā taura whakamātautau mai i te mita i mua i te whakatuwheratanga i te taupoki pākahiko.

3. Nga waahanga matua

• Whakaatu: 6600 tatau
• Auto Ranging and Manual Ranging capabilities
• Automatic Power Off function to conserve battery life
• Aratau Ine Paanga
• Kore-Whakapā Voltage (NCV) Detector for safety
• Diode Tuwhera Voltage: 3.2v
• Continuity Buzzer for quick circuit checks
• MAX/MIN value recording
• Data Hold function to freeze readings
• Tohu Whakaaturanga Pūhiko Iti
• Display Backlight for visibility in low-light conditions

Whakaatu 3.1: Neke Atuview of Mastech MS8251A features, main applications, and included contents. This image illustrates the versatility of the multimeter across domestic, industrial, and electronics applications, highlighting its core functionalities and what comes in the box.

4. Wae Hua me te Neke atuview

The Mastech MS8251A Digital Multimeter is designed for ease of use and durability. Familiarize yourself with its main parts:

• Whakaaturanga LCD: E whakaatu ana i ngā pānui ine, ngā waeine, me ngā tohu mahi.
• Pātene Mahi: REL△, RANGE, MAX/MIN, HOLD, FUNC, NCV, Backlight.
• Whakawhiti Rotary: Selects the desired measurement function (e.g., V~, V—, Ω, A~, A—, Temp, Diode, Continuity, Hz%).
• Ngā Jack Tāuru:
• COM: tauranga noa mo nga inenga katoa.
• VΩHz%Temp→←: Whakauru mo te voltage, resistance, frequency, duty cycle, temperature, diode, and continuity measurements.
• mAμA: Tāuru mō te miriampere me te moroitiampinenga o naianei.
• 10A: Tāuru mō te 10 Ampngā inenga o ia au (whakakotahitia).

Whakaahua 4.1: Mua view of the Mastech MS8251A Digital Multimeter, showing the LCD display, function buttons, rotary switch, and input jacks. This image provides a clear visual reference for identifying the various parts of the device.

5. Tatūnga

5.1. Tāuta Pūhiko

The Mastech MS8251A requires 2 LR44 batteries (included). To install or replace batteries:

1. Ensure the meter is turned OFF and disconnect all test leads from the input terminals.
2. Rapua te wahanga pākahiko kei muri o te mita.
3. Whakamahia he huriwiri hei wetewete i te/ngā tīwiri i te uhi pūhiko.
4. Tangohia te taupoki pākahiko.
5. Insert the 2 LR44 batteries, observing the correct polarity (+ and -).
6. Whakakapia te taupoki pākahiko, ka whakaukia ngā tīwiri.

5.2. Te hono i nga Kaitohu Whakamatau

Always connect the common (black) test lead to the COM jack. Connect the red test lead to the appropriate input jack based on the measurement you intend to make:

• Mo te Voltage, Resistance, Capacitance, Frequency, Duty Cycle, Temperature, Diode, and Continuity measurements, connect the red lead to the VΩHz%Temp→← koki.
• Mō te mirionaampere (mA) moroiti rāneiampine i te au (μA), honoa te taura whero ki te mAμA koki.
• Mo te 10 Ampere (10A) current measurements, connect the red lead to the 10A koki.

6. Nga Tohutohu Whakahaere

Before any measurement, ensure the test leads are correctly connected and the rotary switch is set to the desired function.

6.1. Mahi Whanui

• Hiko ON/OFF: Turn the rotary switch from OFF to any function to power on. Turn to OFF to power off.
• Whakaweto Aunoa: The meter will automatically power off after approximately 15 minutes of inactivity to save battery. Press any button or turn the rotary switch to wake it up.
• Maama Whakamuri: Press the ★ button to turn the display backlight on or off.
• Pupuri Raraunga: Pēhia te pātene HOLD hei whakatio i te pānui o nāianei kei te mata. Pēhia anō hei tuku.
• MAX / MIN: Press the MAX/MIN button to enter MAX/MIN recording mode. The meter will display the maximum or minimum reading detected. Press again to cycle between MAX, MIN, and current reading. Hold to exit.
• RANGE: In auto-ranging mode, press RANGE to switch to manual ranging. Press repeatedly to cycle through available ranges. Hold to return to auto-ranging.
• REL△ (Relative Measurement): Press REL△ to store the current reading as a reference value. Subsequent readings will be displayed as the difference from this reference. Press again to exit.
• MAHI: In multi-function positions (e.g., Diode/Continuity/Temp), press FUNC to cycle through the available sub-functions.

6.2. Ngā Mahi Ine Motuhake

Below are common measurement procedures. Always refer to the specifications for ranges and accuracy.

6.2.1. DC Voltage Ine (V—)

1. Set the rotary switch to the V— position.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Connect the test leads across the component or circuit to be measured in parallel.
4. Pānuihia te voltage uara kei runga i te whakaaturanga.

6.2.2. AC Voltage Inenga (V~)

1. Set the rotary switch to the V~ position.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Connect the test leads across the component or circuit to be measured in parallel.
4. Pānuihia te voltage uara kei runga i te whakaaturanga.

6.2.3. Te Ine Ātete (Ω)

1. Set the rotary switch to the Ω position.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Me mohio kua whakakorehia te hiko i mua i te ine i te parenga.
4. Connect the test leads across the resistor or component.
5. Panuihia te uara aukati kei runga i te whakaaturanga.

6.2.4. Continuity Test (→←)

1. Set the rotary switch to the →← position. Press FUNC if necessary to select continuity.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Me whakarite kia whakakorea te hiko o te ara iahiko.
4. Connect the test leads across the circuit or component. If resistance is less than approximately 50Ω, the buzzer will sound, indicating continuity.

6.2.5. Diode Test (→←)

1. Set the rotary switch to the →← position. Press FUNC if necessary to select diode test.
2. Connect the black test lead to the COM jack and the red test lead to the VΩHz%Temp→← jack.
3. Me whakarite kia whakakorea te hiko o te ara iahiko.
4. Honoa te mata whakamatautau whero ki te anode me te mata whakamatautau pango ki te cathode o te diode. Ka whakaatu te whakaaturanga i te vol muatage drop. Reverse the leads; the display should show OL (Open Loop) for a good diode.

6.2.6. Whakapā-kore Voltage (NCV) Rapunga

1. Set the rotary switch to the NCV position.
2. Move the top end of the meter close to the AC voltage source (e.g., a live wire).
3. The meter will beep and the NCV indicator light will flash if AC voltage is detected. The frequency of beeps and flashes increases with stronger signals.

For other functions like Current (AC/DC), Capacitance, Frequency, Duty Cycle, and Temperature, follow similar steps, ensuring the rotary switch is set to the correct function and test leads are connected to the appropriate input jacks.

7. Tiaki

7.1. Te horoi

Mukua te keehi me te panuiamp cloth and mild detergent. Do not use abrasives or solvents. Keep the terminals free from dirt or dust, which can affect readings.

7.2. Whakakapinga Pūhiko

When the low battery indicator appears on the display, replace the batteries immediately to ensure accurate readings. Refer to Section 5.1 for battery installation instructions.

7.3. Whakakapinga Fuse

If the meter fails to measure current, the fuse may be blown. To replace the fuse:

1. Ensure the meter is turned OFF and disconnect all test leads.
2. Whakatuwheratia te wāhi pākahiko e ai ki te whakaahuatanga i te Wāhanga 5.1.
3. Locate the fuse(s). The MS8251A typically uses a 10A fuse for the 10A input and a 600mA fuse for the mA/μA input.
4. Carefully remove the old fuse and replace it with a new fuse of the same type and rating.
5. Whakakapia te taupoki pākahiko, ka whakaukia ngā tīwiri.

Tuhipoka: Always use fuses with the specified voltage and current ratings for safety and proper operation.

8. Te Raru

9. Whakatakotoranga

9.1. Whakatakotoranga Whānui

• Rahi Hua: 7.87 x 5.91 x 9.84 inihi (200 x 150 x 250 mm)
• Taumaha Tūemi: 2.2 Pounds (1 Kilogram)
• Tae: Kahurangi
• Puna Hiko: Pūhiko (2 ngā pākahiko LR44, kei roto)
• Kaihanga: HE MAIHEI
• Tau tauira: YQ-MS8251A
• Whakatauranga Haumaru: CAT III 600V, CAT II 1000V

9.2. Whakatakotoranga Hiko

Figure 9.1: Detailed electrical specifications for the Mastech MS8251A, including ranges, resolutions, and accuracy for various measurement functions such as DC Voltage, AC Voltage, DC Current, AC Current, Resistance, Capacitance, Frequency, and Duty Cycle.

Figure 9.2: Comparison table highlighting features and specifications across various Mastech digital multimeters, including the MS8251A, providing context on its capabilities relative to other models.

10. Pūtāhui

The Mastech MS8251A Digital Multimeter comes with a 1-tau iti pūtāhui from the date of purchase. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accident, unauthorized repair, neglect, or modification. Please retain your purchase receipt as proof of purchase for warranty claims.

11. Tautoko

For technical support, troubleshooting assistance, or warranty inquiries, please contact Mastech customer service. You can find more information and contact details on the official Mastech webpae, ma te kaihokohoko ranei i hokona e koe te hua.

Tirohia te Mastech Store on Amazon mo etahi atu korero hua me nga rauemi tautoko.