ANENG ST180 Smart Clamp Multimeter User Manual

1. Safety Information

This Mini-sized digital clamp multimeter has been designed according to IEC61010 oncoming electronic measuring instruments with an over voltage category (CAT II 600V) and Pollution degree 2.

WARNING: To avoid possible electric shock or personal injury, follow these Guidelines:

• Do not use the meter if it is damaged. Before you use the meter, inspect the case. Pay particular attention to the insulation surrounding the connectors.
• Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity. Replace damaged test leads before you use the meter.
• Do not use the meter if it operates abnormally. Protection may be impaired. When in doubt, have the meter serviced.
• Do not operate the meter around explosive gas, vapor, or dust.
• Do not apply more than the rated voltage, as marked on the meter, between terminals or between any terminal and earth ground.
• Before use, verify the meter's operation by measuring a known voltage.
• When measuring current, turn off circuit power before connecting the meter in the circuit.
• When servicing the meter, use only specified replacement parts.
• Use with caution when working above 30V AC RMS, 42V peak, or 60V DC. Such voltages pose a shock hazard.
• When using the probes, keep your fingers behind the finger guards on the probes.
• Connect the common test lead before you connect the live test lead. When you disconnect test leads, disconnect the live test lead first.
• Remove the test leads from the meter before you open the battery door.
• Do not operate the meter with the battery door or portions of the cover removed or loosened.
• To avoid false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the low battery indicator ("" appears).
• CAT II - Measurement Category II is for measurements performed on circuits directly connected to low voltage installation. (Examples are measurements on household appliances, portable tools and similar equipment.) Do not use the meter for measurements within Measurement Categories III or IV.

2. Introduction

This manual provides all safety information, operation instruction, specifications and maintenance for the meter. This Mini-size digital instrument performs AC/DC voltage, AC Current, Resistance, Audible Continuity, Diode, and Non-Contact ACV Detect (NCV) as well as Capacitance, Hz etc. It is an auto ranging DMM with AC current clamp meter function. It is compact, handheld, and battery operated.

3. General Characteristics

• Display: 3/4 Digit, updates 2/sec.
• Polarity Indication: "-" displayed automatically
• Over-range Indication: "OL" displayed
• Low Battery Indication: "" displayed
• Operation Temperature: 0°C to 40°C, less than 75%RH
• Storage Temperature: -10°C to 50°C, less than 80%RH
• Battery Type: (AAA size) 1.5V x 2PCS
• Dimension (HxWxD): 183x65x32mm with Jaw Open v 24mm
• Weight: Approx 133g
• Accessories: Operator's Manual, Battery, Test Leads

4. Panel Description

Familiarize yourself with the components of your ANENG ST180 clamp multimeter:

1. Transformer Jaw: Used for non-contact AC current measurement. Jaw opening size: 9.7mm/0.38in.
2. Clamp Trigger: Opens the transformer jaws.
3. LCD Backlight / Bright Screen: Provides illumination for the display. Single press for data save, long press for bright screen.
4. LCD Display: Shows measurement readings and indicators.
5. COM Input Terminal: Common (negative) test lead connection.
6. NCV LED Indication: Lights up during Non-Contact Voltage detection.
7. Manual Range Switching (REL): Briefly press for manual range selection; press and hold for about 2 seconds to deactivate.
8. Function Rotated Switch: Selects the desired measurement function (e.g., ACV, DCV, Resistance, Hz, etc.).
9. Function Select Button (SEL): Used to switch between functions within a mode (e.g., continuity or diode test). Single press for function switch, long press for flashlight.
10. V, Ω, ℃, Hz Input Terminal: Positive test lead connection for voltage, resistance, capacitance, and frequency measurements.

5. Setup

5.1. Battery Installation

The ANENG ST180 requires 2 AAA size 1.5V batteries. If the low battery indicator ("" symbol) appears on the display, the batteries should be replaced.

1. Ensure the multimeter is turned OFF and disconnect all test leads.
2. Locate the battery compartment on the back of the device.
3. Remove the screws securing the battery door and open the compartment.
4. Insert two new AAA 1.5V batteries, observing the correct polarity.
5. Close the battery compartment and secure it with the screws.

5.2. Test Lead Connection

Always connect the black (common) test lead first, then the red (positive) test lead. When disconnecting, remove the red test lead first, then the black.

6. Operating Instructions

6.1. AC/DC Voltage Measurement

1. Connect the BLACK test lead to the COM jack and the RED to the V/Ω jack.
2. Set the function switch to the ACV or DCV position.
3. Connect test leads across the source or load under measurement.
4. Read the LCD display. The polarity of the RED test lead will be indicated when making a DC measurement.

6.2. Resistance Measurement

1. Connect the BLACK test lead to the COM jack and the RED to the V/Ω jack. (Note: The polarity of the RED lead is positive "+" and the BLACK is negative "-").
2. Set the function switch to the resistance position, and then push the "SEL" button to select Ω Mode. The symbol "Ω" will be shown on the LCD.
3. Connect test leads across the resistance under measurement, and then get the test readings on the LCD.

Note:

• For resistance above 2 MΩ or 4 MΩ, the meter may take a few seconds to stabilize reading. This is normal for high resistance measuring.
• When the input is not connected (open circuit), the figure "OL" will be displayed under over-range condition.
• When checking in-circuit resistance, be sure the circuit under test has all power removed and all capacitors are fully discharged.

6.3. AC Current Measurement

1. Set the Function/Range Switch to the AC current range (A~).
2. Press the trigger to open the transformer jaws.
3. Clamp one conductor only. It is impossible to make measurements when two or three conductors are clamped at the same time.
4. The display reading shows the AC current of the conductor.

6.4. Audible Continuity / Diode Test

1. Connect the BLACK test lead to the COM jack and the RED to the V/Ω jack.
2. Set the function switch to the continuity/diode position and push the "SEL" button to select continuity or diode test mode. The symbol "" or "" will be shown on the LCD.
3. Continuity Test: If the circuit resistance under test is lower than 50Ω, the built-in buzzer will sound.
4. Diode Test: Connect the RED and BLACK test leads to the anode and cathode of the diode under test separately. The forward voltage drop of the diode will be displayed.

6.5. Frequency Test

1. Connect the BLACK test lead to the COM jack and the RED test lead to the V/Hz jack.
2. Set the range selector at "Hz" position.
3. Connect the test leads across the circuit under measurement.
4. Take the reading from the LCD.

Note: When testing high frequencies (> 1MHz), the input voltage must be less than 10V for accurate values.

6.6. Capacitance Measurement

1. Connect the BLACK test lead to the COM jack and the RED test lead to the V/Ω jack. (Note: The polarity of the RED test lead is "+").
2. Set the range selector to the capacitance position.
3. Connect the test leads across the capacitor under measurement. Disconnect the capacitor from any outer power source.
4. Check if the "F" mark is on the LCD. If not, push the "SET" button one or more times until shown.
5. Take the reading from the LCD. When testing large capacitors, it's normal for it to take more time to get the values on the LCD.

Note: Make sure to discharge all the capacitor's electricity completely before measurements.

6.7. Non-Contact AC Voltage Detection (NCV)

1. Set the function range switch to the NCV position. The NCV indicating LED light will flash.
2. Take the clamp jaw close to the AC signal source.
3. The NCV indicating LED will constantly flash and the beeper will sound when ACV > 100V.

Note: Do not try to contact the testing place with this tester. No display on LCD at this range.

6.8. Zero Fire Detection (Live Detection)

The ANENG ST180 can detect live wires. When the screen displays "EF" and emits a beep, and the LED flashes red, it indicates a live wire. If the screen displays "EF" with no beep, it is the zero line.

6.9. Flashlight Lighting

The ANENG ST180 features a built-in flashlight for illuminating dark work areas, helping to eliminate the risk of electric shock by improving visibility.

7. Specifications

Accuracy is guaranteed for 1 year at 23°C ± 5°C, less than 75%RH.

8. Maintenance

8.1. Battery Replacement

If the sign "" appears on the display, it indicates the batteries should be replaced. To replace the batteries:

1. Ensure the multimeter is turned OFF and disconnect all test leads.
2. Remove the screws and open the back case.
3. Replace the exhausted batteries with new AAA 1.5V x 2PCS batteries (or equivalent).
4. Close the battery compartment and secure it with the screws.

9. Troubleshooting

If your ANENG ST180 is not functioning as expected, consider the following:

• No display or faint display: Check battery levels. Replace with fresh AAA 1.5V batteries if the low battery indicator is on or if the display is dim.
• Incorrect readings: Ensure test leads are properly connected to the correct jacks for the selected function. Verify the function switch is set to the appropriate measurement type and range. For AC current, ensure only one conductor is clamped.
• No continuity beep: Check if the circuit resistance is below 50Ω. Ensure the "SEL" button has been pressed to select continuity mode.
• "OL" displayed: This indicates an over-range condition or an open circuit. For resistance measurements, ensure the circuit is closed and within the meter's range.

If issues persist after checking these points, consult the full user manual (PDF) or contact customer support.

10. User Tips

• Battery Type: The ANENG ST180 uses two AAA 1.5V batteries. Always have spares on hand for uninterrupted use.
• DC Current Measurement: This model is primarily designed for AC current measurement via the clamp. For DC current, it measures DC voltage. If you need to measure DC current, ensure you are using a multimeter with that specific capability and follow its instructions carefully, typically involving breaking the circuit and inserting the meter in series.
• Understanding "OL": When "OL" (Over Load) appears on the display, it means the measured value exceeds the selected range or the maximum capacity of the meter for that function. Adjust the range if possible, or understand that the value is simply too high for the device to measure.
• Safety First: Always prioritize safety. Double-check connections, ensure power is off when working on circuits for resistance or diode tests, and keep fingers behind probe guards.

11. Warranty and Support

For detailed warranty information and technical support, please refer to the official product documentation or contact the seller directly. Keep your purchase receipt as proof of purchase.

A comprehensive user manual is available in PDF format for further reference: View User Manual (PDF)