SATMW ST193 Digital Clamp Multimeter User Manual

1. Introduction

The SATMW ST193 Digital Clamp Multimeter is a compact, ergonomic, and portable measuring instrument designed for various electrical testing applications. It features a liquid crystal display with a backlight for clear readings, even in low-light conditions. This multimeter offers single-hand operation, overload protection, and a low battery indication, making it an ideal multi-functional tester for professional, factory, school, and home use.

This manual provides detailed instructions for the safe and effective use of your ST193 Digital Clamp Multimeter. Please read it thoroughly before operation and keep it for future reference.

2. Safety Information

To ensure safe operation and service of the meter, follow these safety instructions. Failure to observe these warnings can result in severe injury or death.

• Always ensure the meter is in the correct function and range before making measurements.
• Do not use the meter if it appears damaged or if the insulation on the test leads is compromised.
• Do not apply more than the rated voltage, as marked on the meter, between the terminals or between any terminal and earth ground. The maximum voltage allowed between the measuring terminal and earth is 600V AC/DC.
• Use extreme caution when working with voltages above 60V DC or 30V AC RMS, as these voltages pose a shock hazard.
• Keep your fingers behind the finger guards on the test leads during measurements.
• Remove the test leads from the circuit before changing functions.
• Replace the battery immediately when the low battery indicator appears to ensure accurate readings.
• Do not operate the meter in explosive gas, vapor, or dust environments.

3. Product Overview

The ST193 Digital Clamp Multimeter is designed for high-precision measurements without breaking the circuit. It can measure AC current, AC/DC voltage, resistance, capacitance, diode, live detection, temperature, non-contact induction (NCV), and features an on-off buzzer and frequency (Hz) measurement.

3.1 Key Features

• Automatic and manual measurement modes.
• Overload protection for enhanced safety.
• Large LCD display with backlight for clear readings (Max 5999 counts).
• Automatic power-off after 10 minutes of inactivity to conserve battery.
• Jaw opening of 25mm for clamping wires.
• Integrated flashlight for illuminating dark work areas.

3.2 Component Identification

Refer to the diagram below for an overview of the multimeter's components and controls.

Figure 1: Exploded view of the ST193 Multimeter, detailing the clamp head, jaw trigger control, battery cover, LCD screen, positive and negative test lead sockets, and various buttons for data hold, screen backlight, function switch, power on/off, flashlight, and NCV induction.

Key Controls:

• Clamp Head: Used for non-contact AC current measurement.
• Jaw Trigger Control: Opens and closes the clamp head.
• LCD Bright Screen: Displays measurement readings and indicators.
• Function Switch (SEL button): Single press to cycle through measurement functions.
• Power On/Off: Long press the function switch button.
• Data Hold (H/* button): Single press to hold the current reading.
• Screen Backlight (H/* button): Long press to activate/deactivate backlight.
• Flashlight Switch (T/NCV button): Single press to turn the flashlight on/off.
• NCV Induction (Live) (T/NCV button): Long press to activate Non-Contact Voltage detection.
• Positive Red Test Lead Socket: For positive test lead connection.
• Negative Black Test Lead Socket (COM): For common/negative test lead connection.

4. Setup

4.1 Battery Installation

The ST193 Multimeter requires two 1.5V AAA batteries (not included) for operation. Follow these steps to install the batteries:

1. Ensure the multimeter is powered off and disconnect any test leads.
2. Locate the battery cover on the back of the device (refer to Figure 1).
3. Use a screwdriver to loosen the screw on the battery cover.
4. Remove the battery cover.
5. Insert two 1.5V AAA batteries, observing the correct polarity (+ and -) as indicated inside the battery compartment.
6. Replace the battery cover and tighten the screw securely.

A low battery symbol will appear on the LCD when the battery voltage is low, indicating that the batteries need to be replaced soon.

5. Operating Instructions

This section details how to use the various measurement functions of the ST193 Digital Clamp Multimeter.

5.1 Power On/Off and Basic Functions

• Power On: Long press the SEL button.
• Power Off: Long press the SEL button again. The device also features automatic power-off after 10 minutes of inactivity.
• Backlight: Long press the H/* button to turn the LCD backlight on or off.
• Data Hold: Single press the H/* button to freeze the current reading on the display. Press again to release.
• Flashlight: Single press the T/NCV button to turn the integrated flashlight on or off.

5.2 AC Current Measurement

The clamp head allows for non-contact measurement of AC current.

Figure 2: Measuring AC current with the clamp head. The clamp head includes a flashlight for accurate wire clamping in dark environments.

1. Power on the multimeter.
2. Press the SEL button until the AC current measurement mode is selected (indicated by 'A~' or similar on the display).
3. Open the clamp head using the jaw trigger control.
4. Enclose a single conductor (wire) within the clamp head. Ensure the clamp is fully closed around the wire. Do not clamp multiple wires simultaneously, as this will result in an inaccurate reading.
5. Read the AC current value displayed on the LCD.

5.3 Voltage (AC/DC), Resistance, Capacitance, Frequency, Diode Measurement

For these measurements, use the provided test leads.

1. Insert the black test lead into the COM (common) socket and the red test lead into the VΩHz+ socket.
2. Power on the multimeter.
3. Press the SEL button to cycle through the desired measurement function (AC Voltage, DC Voltage, Resistance, Capacitance, Frequency, Diode).
4. Connect the test leads to the circuit or component under test.
5. Read the measurement value on the LCD.

5.4 Live Detection

The live detection feature helps identify live wires.

Figure 3: Live detection in progress. The screen shows 'EF' and a red light flashes with an alarm buzzer for a live wire, while for an uncharged (neutral) line, only 'EF' is shown without an alarm.

1. Power on the multimeter.
2. Press and hold the T/NCV button to activate Live Detection mode.
3. Place the tip of the multimeter near the wire or outlet.
4. If the screen displays 'EF', a red LED light flashes, and an alarm buzzer sounds, it indicates a live wire.
5. If the screen displays 'EF' but there is no alarm buzzer, it indicates a neutral line.

5.5 Non-Contact Voltage (NCV) Induction

The NCV function allows for quick detection of AC voltage without direct contact.

Figure 4: NCV sensing in action. When AC voltage is detected, the screen displays 'EF', a red LED light flashes, and an alarm buzzer sounds.

1. Power on the multimeter.
2. Long press the T/NCV button to activate NCV mode.
3. Move the top part of the multimeter (NCV sensor area) close to the object being tested (e.g., a wire, outlet).
4. If AC voltage is sensed, the screen will display 'EF', the red LED light will flash, and an alarm buzzer will sound, indicating the presence of voltage.

6. Specifications

The following table outlines the function parameters and general specifications of the ST193 Digital Clamp Multimeter.

Figure 5: Function Parameters of the ST193 Multimeter.

6.1 Physical Dimensions

Figure 6: Dimensions of the ST193 Multimeter.

• Size: 184.5mm (Height) x 67mm (Width) x 32mm (Depth) / 7.26in x 2.64in x 1.25in
• Open Jaw: 25mm (0.98in)
• Test Line OD: Less than 23mm
• Operating Temperature: 18°C ~ 28°C
• Storage Temperature: -10°C ~ 50°C
• Temperature Coefficient: Less than 0.1
• Sampling Time: Approximately 3 times / second

7. Maintenance

Proper maintenance ensures the longevity and accuracy of your multimeter.

• Cleaning: Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
• Battery Replacement: Replace batteries promptly when the low battery indicator appears. Remove batteries if the meter is not used for an extended period to prevent leakage.
• Storage: Store the meter in a cool, dry place, away from direct sunlight and extreme temperatures.
• Calibration: For professional use, periodic calibration by qualified personnel is recommended to maintain accuracy.

8. Troubleshooting

If you encounter issues with your ST193 Multimeter, refer to the following common problems and solutions:

9. Warranty and Support

For warranty information or technical support regarding your SATMW ST193 Digital Clamp Multimeter, please refer to the product packaging or contact the manufacturer directly through their official website or customer service channels. Keep your purchase receipt as proof of purchase for any warranty claims.