1. Basic Understanding of Equipment

1.1 Measurable Parameters

Note: The LS2090-IEC, based on the LS2090 and equipped with custom software (available at an additional cost), fully complies with the relevant requirements of EN/IEC 61000-3-2:2019.

1.2 Equipment Configuration Verification

1.2.1 Unpacking

When unpacking the device, handle it gently to avoid scratching the casing with sharp tools. After unpacking, first inspect the exterior of the device to ensure there is no visible deformation or dents, and that the buttons are not damaged or loose. If you notice any abnormalities with the device or its accessories, do not turn it on. Please contact us immediately.

1.2.2 Main Unit and Accessories

The host is as follows.

The main components of the LS2090 device are as follows (Figure 1-1):

Figure 1-1

1.2.3 Downloading Electronic Documents

We have already sent download links for the electronic user manual, software, calibration certificate, warranty card, and other items via email at the time of shipment. Please download them promptly. If you have not received the email, please contact us to request the download links again.

2. Safety Precautions

2.1 Electrical Safety

Before connecting the power cord, verify that the supply voltage is AC 220V ±10% and the frequency is 50 Hz or 60 Hz. You must use a three-prong outlet with a protective ground, and the protective ground resistance must be ≤4 Ω. Never cut or disconnect the protective ground wire, as doing so poses a risk of electric shock.

2.2 Environmental Safety

Do not use in environments with flammable or explosive materials, strong electromagnetic interference, high temperatures and humidity, or excessive dust levels. Operating environment: Temperature 5°C to 35°C, relative humidity ≤ 65% RH.

2.3 Operating Procedures

Before connecting the wires, the power supply to the sample load must be disconnected; do not connect wires while the circuit is energized. Connect voltage leads in parallel and current leads in series; under no circumstances should a current circuit be connected to a voltage terminal or a voltage circuit to a current terminal. Pay attention to the positive and negative polarities when performing DC measurements. After connecting the wires, tighten the terminals and ensure that no bare wires are exposed to prevent short circuits or electric shock.

When measuring high-frequency signals, keep the wiring as short as possible and use thick, multi-strand wire; route the wiring away from the metal casing of the equipment to minimize interference from distributed capacitance.

3. Equipment Operation

3.1 Introduction to the Front Panel

See Figure 3-1. Note: Using the desktop software makes operation more convenient and eliminates the need to use the front panel of the device; if you need to print a test report, you must also do so through the software. If you use the software, you only need to operate the power switch and load switch on the front panel.

Figure 3-1

3.2 Introduction to the Back Panel and Wiring

Note: To ensure safety during operation, make sure the load power switch on the front panel of the equipment is in the off (up) position before connecting the wires.

3.2.1 Using LED Light Sources

Figure 3-2

3.2.2 Using the MB98 DC Electronic Load

See Figure 3-3. Connect the LED LOAD to the MB98 series electronic load, observing the correct polarity. All other connections are the same as in Section 3.2.1.

Figure 3-3

3.3 Equipment Testing Procedures

3.3.1 Using LED Light Sources

3.3.2 Using the MB98 DC Electronic Load

4. Software Operation (Using the LS2090-IEC Software as an Example)

4.1 Software Installation

Software System Requirements: Computers running Windows 7 or later.

The LS2090 connects to the computer via an RS-232 cable. If the computer does not have an RS-232 port, you will need to use an RS-232-to-USB adapter cable to connect the two devices.

See Figure 4-1 for the software installation package.

Figure 4-1

4.2 Software Overview

4.2.1 Software Start Screen

See Figure 4-2.

Figure 4-2

4.2.2 System Configuration Interface

See Figure 4-3.

Figure 4-3

4.2.3 Product Information Screen

See Figure 4-4.

Figure 4-4

4.3 Software Testing Procedures

5. Daily Maintenance and Care of Equipment

5.1 Routine Maintenance

5.1.1 Daily Cleaning

Be sure to turn off the power and unplug the power cord before cleaning. We recommend wiping the unit with a soft, antistatic cotton cloth and a mild detergent; do not spray liquids directly onto the unit. Do not use chemical solvents such as benzene, toluene, or acetone.

5.1.2 Routine Inspections

Before each use, check the power cord and terminal connections to ensure there are no loose connections or signs of burn damage; after turning on the unit, verify that the indicator lights and display are functioning properly.

5.2 Storage Specifications

5.2.1 Storage Environment Requirements

Temperature: 5°C to 35°C; relative humidity: ≤65% RH; dry, dust-free environment free of corrosive gases.

5.2.2 Long-Term Storage Operations

Turn off the power and unplug all cables; clean the equipment and wrap it in dust-proof film; power it on for 30 minutes each month to prevent moisture damage to the components.

5.3 Calibration Interval Requirements

To ensure the measurement accuracy and operational reliability of the equipment, it is recommended that it be sent periodically to a qualified third-party metrology laboratory for calibration. The recommended calibration interval is 12 months. Users may determine the specific calibration interval based on frequency of use, environmental conditions, and quality system requirements.

6. Troubleshooting and Resolving Common Problems

7. Packing List