Fluke 28IIEX/ETL Intrinsically Safe True-RMS Digital Multimeter User Manual

1. ບົດແນະນຳ

This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of the Fluke 28IIEX/ETL Intrinsically Safe True-RMS Digital Multimeter. This device is engineered for precise electrical measurements in potentially hazardous environments, offering robust performance and advanced safety features.

2. ຂໍ້ມູນຄວາມປອດໄພ

WARNING: Read and understand all safety information before using this product. Failure to do so may result in serious injury or death.

2.1 ຂໍ້ແນະນຳຄວາມປອດໄພທົ່ວໄປ

• Always use the multimeter with the specified test leads and accessories.
• Do not use the multimeter if it appears damaged or is operating abnormally.
• ສັງເກດເບິ່ງລະຫັດຄວາມປອດໄພທ້ອງຖິ່ນແລະແຫ່ງຊາດທັງຫມົດ.
• ໃຫ້ແນ່ໃຈວ່າໄດ້ເລືອກຟັງຊັນ ແລະ ຂອບເຂດທີ່ຖືກຕ້ອງກ່ອນການວັດແທກ.
• Avoid working alone in hazardous environments.

2.2 Intrinsically Safe Operation

The Fluke 28IIEX/ETL is designed for use in hazardous locations classified as:

• ATEX: II 2 G Ex ia IIC T4 Gb, II 2 D Ex ia IIIC T130°C Db, I M1 Ex ia I Ma
• NEC-500: Class I, Div 1, Groups A-D, 130 °C
• IEXEx: Ex ia IIC T4 Gb, Ex ia IIIC T130°C Db, Ex ia I Ma

These ratings ensure the device will not ignite explosive atmospheres under normal or fault conditions. Always ensure the device is used within its specified environmental and electrical limits for intrinsically safe operation.

2.3 Electrical Safety Ratings

The multimeter meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for:

• Category III 1000V: For measurements on building circuit installations (e.g., service panel parts, branch circuits, fixed installations).
• Category IV 600V: For measurements at the origin of the installation (e.g., electricity meters, primary over-current protection equipment).
• ລະດັບມົນລະພິດ 2: ສໍາລັບການນໍາໃຊ້ພາຍໃນ.

2.4 ການປົກປ້ອງສິ່ງແວດລ້ອມ

The device is Ingress Protection (IP) certified IP67, meaning it is waterproof, dust-proof, and drop-proof, suitable for harsh industrial environments.

3. ຜະລິດຕະພັນເກີນview

The Fluke 28IIEX/ETL is a robust digital multimeter designed for reliability and accuracy. It features a large LCD display with a two-level bright white backlight for visibility in various lighting conditions.

ຮູບ 1: ດ້ານຫນ້າ view of the Fluke 28IIEX/ETL Digital Multimeter. The image displays the device with its red protective holster, gray body, LCD screen showing '28.20 V AC', and the rotary dial for function selection. Below the dial are the input jacks for current, voltage, and common connections, along with safety warnings and certifications.

3.1 ລັກສະນະທີ່ສໍາຄັນ

• True-RMS measurements for accurate readings on linear and non-linear loads.
• Auto- and manual-ranging capabilities.
• ມາດຕະການ voltage, current, resistance, capacitance, frequency, temperature, conductance, and duty cycle.
• Performs continuity and diode tests.
• Low-pass filter for accurate voltage and frequency measurements on variable-speed motor drives.
• MIN/MAX/AVG and Peak Capture functions to record transients and measurement variations.
• Relative mode to remove test lead interference.
• Backlit keypad buttons and display for low-light conditions.
• Audible alarm for incorrect test lead connection.

4. ຕັ້ງຄ່າ

4.1 ການຕິດຕັ້ງຫມໍ້ໄຟ

The Fluke 28IIEX/ETL requires four (4) AA alkaline batteries for operation. To install or replace batteries:

1. ກວດໃຫ້ແນ່ໃຈວ່າມັລຕິມິເຕີຖືກປິດໄວ້.
2. ຖອດຖົງຢາງປ້ອງກັນອອກ.
3. Locate and open the battery compartment cover on the rear of the device.
4. Insert four new AA alkaline batteries, observing the correct polarity markings.
5. Securely close the battery compartment cover and reattach the holster.

4.2 ການເຊື່ອມຕໍ່ຜູ້ນໍາການທົດສອບ

Always connect test leads to the appropriate input jacks for the measurement being performed. The multimeter will sound an alarm if leads are connected incorrectly for the selected function.

• COM Jack: Connect the black test lead to the common (COM) jack for all measurements.
• VΩHz Jack: ເຊື່ອມຕໍ່ສາຍທົດສອບສີແດງເຂົ້າກັບແຈັກນີ້ເພື່ອຄວາມແຮງtage, resistance, frequency, capacitance, and diode tests.
• ແຈັກ mA: Connect the red test lead to this jack for current measurements up to 400mA. This input is fused.
• 10A Max Fused Jack: Connect the red test lead to this jack for current measurements up to 10A. This input is fused.

5. ຄໍາແນະນໍາການດໍາເນີນງານ

Turn the rotary switch to the desired function. The multimeter defaults to auto-ranging mode, automatically selecting the correct measurement range. Press the 'RANGE' button to switch to manual ranging.

5.1 ການ​ວັດ​ແທກ Voltage (AC/DC)

1. ເຊື່ອມຕໍ່ສາຍສີດຳເຂົ້າກັບ COM ແລະ ສາຍສີແດງເຂົ້າກັບ VΩHz.
2. Turn the rotary switch to V~ (AC Voltage) ຫຼື V- (DC Voltagແລະ).
3. Connect the test leads across the circuit or component to be measured.

5.2 Measuring Current (mA/A/µA)

WARNING: Never attempt to measure current by connecting the multimeter in parallel with a voltage source. This can damage the meter and cause injury.

1. Connect the black lead to COM. Connect the red lead to mAµA for small currents or 10A Max Fused for larger currents.
2. Turn the rotary switch to mA/A~ (AC Current) or mA/A- (DC Current).
3. ເປີດວົງຈອນ ແລະ ເຊື່ອມຕໍ່ມັນຕິມີເຕີຕາມຊຸດກັບໂຫຼດ.

5.3 ການວັດແທກຄວາມຕ້ານທານ (Ω)

1. ເຊື່ອມຕໍ່ສາຍສີດຳເຂົ້າກັບ COM ແລະ ສາຍສີແດງເຂົ້າກັບ VΩHz.
2. Turn the rotary switch to Ω.
3. Ensure the circuit is de-energized. Connect the test leads across the component.

5.4 ການທົດສອບຄວາມຕໍ່ເນື່ອງ

1. ເຊື່ອມຕໍ່ສາຍສີດຳເຂົ້າກັບ COM ແລະ ສາຍສີແດງເຂົ້າກັບ VΩHz.
2. Turn the rotary switch to the continuity symbol (speaker icon).
3. Ensure the circuit is de-energized. Connect the test leads across the component. An audible tone indicates continuity.

5.5 ທົດສອບ Diode

1. ເຊື່ອມຕໍ່ສາຍສີດຳເຂົ້າກັບ COM ແລະ ສາຍສີແດງເຂົ້າກັບ VΩHz.
2. Turn the rotary switch to the diode symbol.
3. Ensure the circuit is de-energized. Connect the test leads across the diode. The display shows the forward voltage ຫຼຸດລົງ.

5.6 ການວັດແທກຄວາມຈຸ (F)

1. ເຊື່ອມຕໍ່ສາຍສີດຳເຂົ້າກັບ COM ແລະ ສາຍສີແດງເຂົ້າກັບ VΩHz.
2. Turn the rotary switch to the capacitance symbol.
3. Ensure the capacitor is discharged before connecting the test leads.

5.7 ຄວາມຖີ່ໃນການວັດແທກ (Hz) ແລະ ວົງຈອນໜ້າທີ່ (%)

1. ເຊື່ອມຕໍ່ສາຍສີດຳເຂົ້າກັບ COM ແລະ ສາຍສີແດງເຂົ້າກັບ VΩHz.
2. Turn the rotary switch to Hz.
3. Connect the test leads across the signal source. Press the '%' button to view ວົງ​ຈອນ​ຫນ້າ​ທີ່​.

5.8 Measuring Temperature (°C/°F)

1. Connect the K-type thermocouple (included) to the VΩHz and COM jacks, observing polarity.
2. Turn the rotary switch to the temperature symbol.
3. Place the thermocouple tip on the object to be measured.

5.9 ໜ້າທີ່ພິເສດ

• ຕໍ່າສຸດ ສູງສຸດ: Press to record minimum, maximum, and average readings over time.
• PEAK MIN MAX: Captures fast transients.
• REL Δ (Relative Mode): Subtracts the stored reading from subsequent readings, useful for nulling out test lead resistance.
• ຖື: ຢຸດການອ່ານໜ້າຈໍປັດຈຸບັນ.

6. ບໍາລຸງຮັກສາ

6.1 ການທໍາຄວາມສະອາດ

ເຊັດກໍລະນີທີ່ມີໂຄສະນາamp ຜ້າ ແລະ ຜົງຊັກຟອກອ່ອນໆ. ຢ່າໃຊ້ນໍ້າຢາຂັດ ຫຼື ຕົວລະລາຍ. ໃຫ້ແນ່ໃຈວ່າອຸປະກອນແຫ້ງກ່ອນການນຳໃຊ້.

6.2 ການທົດແທນຫມໍ້ໄຟ

ໃຫ້ອ້າງອີງເຖິງພາກທີ 4.1 ສຳລັບຄຳແນະນຳໃນການປ່ຽນແບັດເຕີຣີ. ໃຫ້ປ່ຽນແບັດເຕີຣີເມື່ອຕົວຊີ້ບອກແບັດເຕີຣີຕໍ່າປະກົດຂຶ້ນຢູ່ໜ້າຈໍ.

6.3 ການທົດແທນຟິວ

WARNING: To prevent injury or damage to the multimeter, use only specified replacement fuses with the correct amperage, voltage, ແລະຂັດຂວາງການຈັດອັນດັບ.

The Fluke 28IIEX/ETL has two internal fuses:

• 10A Max Fused: For the 10A current input.
• 400mA Fused: For the mA/µA current input.

Fuse replacement should only be performed by qualified personnel. Consult the full service manual or contact Fluke customer support for detailed instructions.

7. ການແກ້ໄຂບັນຫາ

If the multimeter is not functioning as expected, review ບັນຫາທົ່ວໄປຕໍ່ໄປນີ້:

• ບໍ່​ມີ​ການ​ສະ​ແດງ​ໃຫ້​ເຫັນ​ຫຼື​ແຈ້ງ​ການ​: ກວດເບິ່ງຫມໍ້ໄຟແລະປ່ຽນແທນຖ້າຈໍາເປັນ.
• ການອ່ານບໍ່ຖືກຕ້ອງ: Ensure test leads are correctly connected, the function and range are appropriate for the measurement, and the circuit is de-energized for resistance/continuity/diode tests.
• ການວັດແທກປະຈຸບັນບໍ່ໄດ້ເຮັດວຽກ: Check the fuses for the respective current input (10A or 400mA). Replace if blown.
• Multimeter does not respond: Turn the unit off and then on again. If the issue persists, remove batteries for a few minutes and reinsert.

For persistent issues or complex problems, contact Fluke customer support.

8. ຂໍ້ມູນຈໍາເພາະ

9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ

Fluke Corporation products are designed for reliability and performance. For warranty information, technical support, or service, please visit the official Fluke website or contact your local Fluke representative.

Official Fluke Webເວັບໄຊ: www.fluke.com