1. Safety Information
Important Warnings: Pay special attention to the use of this instrument. Improper use may cause electric shock or damage to the instrument. Always observe usual safety regulations and safety measures outlined in this manual.
To ensure full use of the instrument's functions and guarantee safe operation, please read and observe the use methods in this manual carefully.
The instrument complies with safety requirements for electronic measuring instruments EN-61010-1, EN-61010-2-030, and EN-61010-2-032, level II pollution, with an over-voltage standard of CAT II 600V.
1.1 Preparation
- When using this instrument, users must observe standard safety rules, including general electric shock prevention and prevention of misuse of the instrument.
- After receiving the instrument, check whether it is damaged during transportation.
- After storing and shipping under adverse conditions, check whether the instrument has been damaged.
- Test leads must be in good condition. Before use, check whether the insulation of the leads is damaged and whether any metal wire is exposed.
1.2 Safety Symbols
- !: Note (refer to user manual for important safety information)
- ▲: Able to be used on dangerous electrified conductors.
- □: Dual-insulation protection (Category II)
- CAT III: Over-voltage according to IEC-61010-1 standard (installation), level III, pollution degree 2 refers to protection level of pulse withstand voltage provided.
- CE: Comply with EU standard.
- ⏚: Grounded
2. Product Overview
The ANENG ST212 is an intelligent digital clamp multimeter designed for high-precision measurements in various electrical applications. It features automatic measurement function and range selection, overload protection, and a large color screen for easy reading.
2.1 Part Names
Diagram illustrating the main components of the ANENG ST212 Digital Clamp Meter.
- Data hold and flashlight button
- REL DC current back to zero / NCV button
- LCD display
- Input socket
- Power button / SEL function conversion button
- Caution light
- Current measuring clamp
- Contactless induction zone
- Electric torch
2.2 LCD Display Symbols
The LCD display of the ANENG ST212 features a VA color reverse display for clear visibility and shows various measurement indicators.
| Symbol | Description |
|---|---|
| ~ --- | AC & DC |
| •))) | Connection/Disconnection indication |
| AUTO | Automatic range mode |
| ⏻ | Automatic shutdown indication |
| ⎕ | Low battery |
| H | Reading hold state |
| V, A | Volt (voltage), Ampere (current) |
| Ω, kΩ, MΩ | Ohm, kilohm, and megohm (resistance) |
| Hz | Hertz |
| ⟛ | DIODE |
| nF, uF, mF | Nanofarad, microfarad, millifarad (capacitance) |
| °C, °F | Centigrade and Fahrenheit |
| NCV | Non-contact measuring voltage |
| Live | Live line voltage identification |
3. Package Contents
Your ANENG ST212 Digital Clamp Meter package includes the following items:
- 1 x ANENG ST212 Clamp Meter
- 2 x Test Probes (Red and Black)
- 1 x Thermocouple
- 1 x User Manual
- 2 x AAA Batteries (Not included in all packages, please check product description)
Image showing the complete accessories included with the ANENG ST212 Digital Clamp Meter.
4. Specifications
The instrument specifies a one-year calibration cycle and should be re-calibrated under 18°C ~ 28°C, with relative humidity less than 75%.
| Parameter | Value |
|---|---|
| Model | ST212 |
| Display Type | Analog-Digital, VA color reverse display |
| Maximum Counts | 6000 counts |
| DIY Supplies | Electrical |
| Certification | CE |
| Operating Temperature | 0-40°C (32-104°F) |
| Storage Temperature | -10°C ~ 50°C (14°F ~ 122°F) |
| Operating Height | Max. 2000m |
| Power Supply | 2 x 1.5V AAA batteries |
| Automatic Shut-down | 15 minutes of inactivity |
| Weight | 149.2g |
| Dimensions | 182mm x 62.1mm x 33.4mm (7.16in x 2.44in x 1.31in) |
| Jaw Opening Size | 31.5mm / 1.24in |
| Test Lead Material | PVC/Brass |
| Test Lead Length | 88.5cm / 34.8in |
4.1 Measurement Ranges and Accuracy
| Function | Range | Resolution | Accuracy |
|---|---|---|---|
| AC Voltage | 600mV / 600V | 0.1mV / 0.1V | ±(0.8%+5) |
| DC Voltage | 600mV / 600V | 0.1mV / 0.1V | ±(0.5%+3) |
| AC Current | 60A / 400A | 0.01A / 0.1A | ±(2.5%+8) |
| DC Current | 60A / 400A | 0.01A / 0.1A | ±(2.5%+8) |
| Resistance | 600Ω / 60MΩ | 0.1Ω / 0.01MΩ | ±(0.8%+3) |
| Capacitance | 6nF / 60mF | 0.01nF / 10µF | ±(2.5%+20) |
| Frequency | 60.0Hz / 1000Hz | 0.1Hz / 1Hz | ±(1.0%+5) |
| Temperature | -40°C ~ 1000°C (-40°F ~ 1832°F) | 1°C / 1°F | ±(1.0%+3) |
| Diode Test | 1V | 0.001V | Testing current: ~1mA; Open circuit voltage: ~2.8V |
| Continuity Test | <50Ω | 1Ω | Buzzer sounds |
5. Setup and Operation Guide
5.1 Battery Installation
The ANENG ST212 requires 2 AAA batteries for operation. To install or replace batteries:
- Unfasten the bolts on the battery cover at the back of the instrument and remove the cover.
- Insert the new AAA batteries, ensuring correct polarity.
- Place the battery cover back and secure the bolts.
Note: If the low battery symbol (⎕) appears on the LCD, replace the batteries immediately to avoid inaccurate readings.
5.2 Power On/Off
- To power on, press and hold the SEL button.
- To power off, press the power button again.
- The instrument will automatically shut down after 15 minutes of inactivity to save energy. Press any button to wake it up.
5.3 Reading Hold (H)
During measurement, press the H button to hold the current reading on the display. Press it again to cancel the hold function.
5.4 Flashlight Function
Long press the flashlight button for 2 seconds to turn on the built-in flashlight. It will automatically turn off after approximately 1 minute. This is useful for lighting dark environments during measurements.
The flashlight function provides lighting for measurements in dark environments.
5.5 AC/DC Current Measurement
The ST212 can measure both AC and DC currents up to 400A using its clamp head.
- Automatic Mode: Hold the trigger to open the clamp head. Clamp a single wire of the tested line within the clamp. The instrument will automatically detect and display the current. For AC current, if the signal is >35A, the auxiliary display will show the frequency.
- Manual Mode (DC Current): Press the SEL button until it switches to DCA (DC Current) gear. Clamp a single wire.
- Manual Mode (AC Current): Press the SEL button to switch to AC current. Clamp a single wire.
Measuring automotive DC current with the clamp meter.
High precision DC current measurement without breaking the circuit.
Instructions for switching to DC current mode and performing a measurement.
When measuring current, ensure the single-strand wire is placed in the center of the clamp to avoid length errors. Do not clamp multiple wires or a zero/fire line together.
5.6 DC Voltage Measurement
Connect the test leads to the input sockets (red to VΩHz, black to COM) and the signal being tested.
- If the measured DC signal is greater than 0.5V, the display shows the voltage value.
- If the measured DC signal is less than 0.5V, the instrument uses the default resistance value and displays the resistance value.
- For mV DC voltage, press the SEL button to switch to mV DC voltage mode.
Measuring DC voltage on a car battery.
5.7 AC Voltage Measurement
Connect the test leads to the input sockets (red to VΩHz, black to COM) and the signal being tested.
- If the measured AC signal is greater than 0.5V, the display shows the voltage and frequency values.
- If the measured AC signal is less than 0.5V, the instrument uses the default resistance value and displays the internal resistance value.
- For mV AC voltage, press the SEL button to enable the mV function.
Measuring AC voltage from a wall outlet.
5.8 Resistance Measurement
Connect the test leads to the input sockets (red to VΩHz, black to COM) and the resistance to be measured. The main display will show the resistance value.
Measuring resistance using the test leads.
5.9 Diode Measurement
Connect the test leads to the input sockets (red to VΩHz, black to COM). Switch the diode function. Touch the test leads to the diode. The display shows an approximation of the diode forward pressure drop.
Measuring diode forward voltage drop.
5.10 Capacitance Measurement
Connect the test leads to the input sockets (red to VΩHz, black to COM). Press the SEL key to switch to capacitance mode. Measure the capacitance with both ends of the test leads and read the measurement from the LCD.
Measuring capacitance of a component.
5.11 Continuity (Line On-Off) Test
Connect the test leads to the input sockets (red to VΩHz, black to COM). If the measured line resistance is less than 50Ω, the buzzer will sound, and the caution light will turn on.
5.12 Temperature Measurement
Press the SEL key to switch to TEMP mode. Insert the red plug of the thermocouple into the °C/°F end and the black plug into the COM jack. Touch the thermocouple to the object whose temperature is to be measured. When the reading is stable, the temperature value can be read directly from the display screen.
Measuring temperature using the provided thermocouple.
5.13 NCV (Non-Contact Voltage) Detection
Hold down the NCV key to display "EF". Bring the NCV sensor (contactless induction zone) close to the conductor under test. If the instrument detects AC voltage (>90V), the buzzer will alarm, and the NCV alarm light will flash.
Non-contact sensing of AC voltage.
NCV non-contact induction measurement near a power outlet.
5.14 Zero Line of Fire Detection
Insert the red test lead into the VΩHz input socket. Press the SEL button to switch to LIVE mode. Touch the red test lead to the live wire. If it's the live wire, the red light will flash, and the buzzer will sound. If it's the neutral wire, no flashing red light or beep will occur.
Detecting the live wire in a power outlet.
5.15 Product Demonstration Video
A video demonstrating various measurement functions of the ANENG ST212 Digital Clamp Meter, including packaging display, DC current, AC current, resistance, diode, capacitance, buzzer detection, temperature, zero line of fire detection, AC voltage, and DC voltage measurements.
6. Maintenance
6.1 General Maintenance
- Do not attempt to open the bottom case to adjust or repair the instrument. Such operations should only be conducted by qualified technicians who fully understand the instrument and electric shock hazards.
- Before opening the instrument's bottom case or battery cover, always remove the test leads from the circuit being measured.
- Use a wet cloth and gentle detergent to clean the instrument. Do not use any abrasive or solvent.
- Power off the instrument when not in use and rotate the range switch to the OFF position.
- If the instrument is not used for a long time, remove the batteries to prevent damage from leakage.
6.2 Changing Test Leads
When changing the test leads, it is required to replace them with identical leads or leads of the same level. The leads must be in good condition, and the level of the leads should be 1000V 10A. If the insulation layer of the lead is damaged or the metal wire is exposed, the lead must be replaced.
7. Troubleshooting and User Tips
7.1 Common Issues
- No display or faint display: Check battery level and replace if necessary. Ensure batteries are inserted with correct polarity.
- "OL" displayed: This indicates an over-range condition. The measured value exceeds the instrument's maximum range for the current setting. Adjust the range or select a different measurement function if applicable.
- Inaccurate readings: Ensure test leads are properly connected and in good condition. For DC current, press the "REL" key to reset the meter to zero before measuring for accurate results.
7.2 User Tips
- Auto-Ranging vs. Manual Selection: The ANENG ST212 primarily operates in auto-ranging mode for most functions, automatically selecting the appropriate range. For specific measurements like DC current, you may need to manually switch the gear using the SEL button.
- Capacitance Measurement: When measuring large capacitors, allow sufficient time for the reading to stabilize. When measuring polarized capacitors, pay attention to the correct polarity to avoid damaging the instrument.
- AC Current Measurement: Always clamp only a single-strand wire when measuring AC current. Clamping multiple wires or both live and neutral wires will result in an incorrect (zero) reading. Position the wire in the center of the clamp for best accuracy.
- NCV Detection: While NCV is a useful safety feature, do not solely rely on it to determine if a wire is live. Always use proper safety procedures and verify with direct contact measurement if necessary. Socket design or insulation thickness can affect NCV performance. In NCV mode, the meter does not simultaneously measure voltage, resistance, or current.
- Temperature Measurement: The accuracy of temperature measurements does not include the error of the thermocouple probe itself. The maximum temperature for the randomly packaged K-type thermocouple is typically 250°C, with instantaneous measurements up to 300°C.
8. Warranty and Support
ANENG provides professional after-sales support. If you have any problems during the use of the product, please contact ANENG customer service for timely solutions.
ANENG's professional after-sales team is available to assist with product inquiries, quality issues, replacement/refund requests, product operation, and general usage questions.
- Quality Issues: For quality problems other than "man-made damage," replacement services or refunds may be provided.
- Product Not Operating Properly: Provide a detailed video of the product not operating normally to ANENG customer service for assistance.
- Product Use Questions: This product requires a certain degree of electrical knowledge. If you encounter operational problems or do not understand how to use the product, contact ANENG customer service.