ANENG ST180 Digital Clamp Meter Instruction 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.

CAUTION

To avoid damage to the meter, don't apply input which exceeds the limit shown below:

• Input Limits: 600V DC or 600V RMS AC
• Terminals: VΩ & COM, 250V DC or RMS AC
• °C.Hz: VΩ & COM, 250V DC or RMS AC

2. Introduction

This manual provides all safety information, operation instruction, specifications and maintenance for the ANENG ST180 Digital Clamp Meter, which is compact, handheld, and battery operated.

This instrument performs AC/DC voltage, DC/AC Current, Resistance, Audible Continuity, Diode, Temperature measurements and Non-Contact ACV Detect (NCV) as well as Capacitance, Hz etc. It is an auto ranging DMM with AC/DC current clamp meter function.

3. Product Overview

The ANENG ST180 is a high-precision digital clamp meter designed for various electrical measurements without breaking the circuit. It features a 4000-count display and a range of functions for comprehensive testing.

4. Panel Description

Familiarize yourself with the components of your ANENG ST180 Digital Clamp Meter:

1. Transformer Jaw: Used for non-contact AC current measurement.
2. Clamp Trigger: Opens the transformer jaw.
3. LCD Backlight & Data Hold Button (H/*): Short press for data hold, long press for LCD backlight.
4. LCD Display: Digital readout for measurements.
5. COM Input Terminal: Common (negative) input for test leads.
6. NCV LED Indication: Lights up during Non-Contact Voltage detection.
7. Manual Range Switching (REL): Short press for manual range selection, long press to deactivate.
8. Function Rotated Switch: Selects the desired measurement function.
9. Function Select Button (SEL): Used to switch between sub-functions (e.g., continuity/diode, AC/DC voltage).
10. V, Ω, °C, Hz Input Terminal: Positive input for voltage, resistance, temperature, and frequency measurements.
11. Low Battery Symbol: Indicates when battery replacement is needed.
12. LED Lighting: Provides illumination for dark work areas.
13. Jaw Open Trigger: Activates the clamp jaw.
14. Function Dial: Rotary switch to select measurement modes.
15. Negative Black Test Lead Socket: Connects the black test lead.
16. Positive Red Test Lead Socket (VΩHz): Connects the red test lead.

5. Specifications

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

General Characteristics

• Display: 3 3/4 Digit, updates 2/sec. (4000 counts)
• 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 (Not included)
• Dimensions: 183 x 65 x 32mm (with Jaw Open ≤ 24mm)
• Weight: Approx. 133g

Measurement Ranges and Accuracy

6. Control Button Description

6.1. HOLD AND LCD BACKLIT BUTTON (H/*)

• When you press this button briefly, the LCD will show the last reading, and "H" symbol will appear until pushed again. Data holding will be cancelled automatically when the function switch is rotated.
• When you hold this button down for about 2 seconds, the LCD will be backlit and lighting remains about 15 seconds before automatically turning off.

6.2. Manual Range Selection (REL)

• Press this key briefly for manual range selection.
• Press and hold for about 2 seconds to deactivate.

6.3. Function Select Button (SET)

• This key is used to switch between sub-functions (e.g., continuity/diode, AC/DC voltage switching).

7. Operation Instruction

7.1. 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 at ACV or DCV position, connect test leads across the source or load under measurement.
3. Read the LCD display. The polarity of the RED test lead will be indicated when making a DC measurement.

7.2. 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 at Ω position, and then push "SEL" button to select Mode, then the symbol "Ω" is shown on LCD.
3. Connect test leads across the resistance under measurement, and then get the test readings on 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, i.e. at 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.

7.3. AC Current Measurement

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

Important: AC current measurement can only measure the zero line or fire line, and only a core line. The common electrical appliances in the home power supply line are not measured because it contains a number of core wires.

7.4. 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 at position and push the button "SEL" to select continuity or diode test mode. Then the symbol "" or "" is shown on LCD.
3. In continuity test, if the circuit resistance under test is lower than 50Ω, the built-in buzzer will sound.
4. If diode test mode is selected, connect the RED and BLACK test leads to anode and cathodes of the diode under test separately. The forward voltage drop of the diode will be displayed.

7.5. Frequency Test

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

Note:

• When testing high frequency (> 1MHz), the input voltage must be less than 10V for getting the accurate value.

7.6. 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. Put the range selector at position, and connect the test leads across the Capacitor under measurement. Disconnect the capacitor from the outer power source.
3. Check if the "F" mark is on the LCD. If not, push the "SET" button one or more times until shown.
4. Take the reading from LCD. When testing a large capacitor, it's normal to take more time for getting the values on LCD.

NOTE:

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

7.7. Temperature Measurement

1. Set the function range switch at the °C position.
2. Make sure the polarity of the thermocouple is correct. Put the Black pin terminal of the K-type thermocouple sensor into the COM jack and the RED pin terminal into the V/Ω/°C jack.
3. Set the working end (testing end) on or inside the object under test.
4. The value of the temperature is shown on the display in degree Celsius (°C).

NOTE:

• The testing temperature is displayed automatically when the thermocouple sensor is put into the testing holes.
• The surrounding temperature is shown when the circuit of the sensor is cut off.
• The limit temperature measured by the thermocouple given together with the instrument is 250°C/482°F; 300°C/572°F is acceptable within a short period.

7.8. Non-Contact AC Voltage Detection (NCV)

1. Set the function range switch at the NCV position. Then the NCV indicating LED light will flash.
2. Take the clamp jaw close to the AC signal.
3. Then the NCV indicating LED will constantly flash and the Beeper will sound at the same time, once ACV > 100V.

NOTE:

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

7.9. Zero Fire Detection (Live Detection)

1. Set the function switch to the Live Detection mode (often indicated by a lightning bolt symbol or 'Live').
2. Insert the red test lead into the live wire or socket.
3. If the screen displays "EF" and emits a beep with a red LED flash, it indicates a live wire (firewire).
4. If the screen displays "EF" with no beep, it indicates a neutral line.

7.10. Flashlight Lighting

The meter is equipped with an LED flashlight to illuminate dark work areas, eliminating the risk of electric shock in low-light conditions. Long press the H/* button to activate the flashlight.

8. Maintenance

8.1. Battery Replacement

If the sign "" appears on the display, it indicates the battery should be replaced. Remove screws and open the back case, replace the exhausted batteries with new ones (AAA 1.5V *2pc or equivalent).

9. Troubleshooting

If you encounter issues with your ANENG ST180 Digital Clamp Meter, please refer to the following common problems and solutions:

• Product Not Operating Properly: If the product is not operating normally during use, please provide a detailed video of the product not operating normally to ANENG customer service. Our experts and technicians can quickly find out the product problem and provide you with a solution.
• Questions About Product Use: This brand product is a technical product and requires a certain degree of electrical knowledge. If you encounter operational problems or do not understand how to use the product, please contact ANENG customer service for assistance.
• Product Has Been Artificially Damaged: This brand is mostly used to detect electrical and other measurement products. It requires a certain degree of electrical knowledge. Pay attention to the use of certain operating procedures, select the correct measurement method, and avoid dangerous events. If the customer uses the product improperly and the use method is not equal, resulting in damage to the product, it will be judged as man-made damage, which is not within the scope of after-sales service of the product.

10. User Tips

• Always ensure the meter is set to the correct function and range before making any measurements to prevent damage to the device or personal injury.
• For AC current measurements, always clamp around a single conductor, not an entire cable with multiple wires, to get an accurate reading.
• When measuring resistance or capacitance, ensure the circuit is de-energized and all capacitors are fully discharged.
• The NCV function is a convenient way to quickly detect live voltage without direct contact, but always exercise caution and verify with direct contact measurement if safety is critical.

11. Warranty and Support

For detailed warranty information and further support, please refer to the official user manual PDF available for download. You can access the PDF document via the following link: ANENG ST180 User Manual (PDF).

For after-sales questions, quality issues, or replacement/refund requests, please contact ANENG customer service directly.