Extech LCR200 Passive Component LCR Meter User Manual

1. Introduction

The Extech LCR200 is a passive component LCR meter designed for precise measurements of inductance, capacitance, and resistance. This device offers a simultaneous 20,000/2,000 count display for primary and secondary parameters on its high-contrast backlit screen. It supports various functions including Hi/Lo limit settings, Open and Short Zero calibration to remove stray impedances, and an Auto Power Off feature. The meter is supplied with a built-in test fixture and external test leads, powered by a 9V battery.

2. Key Features

• Measures inductance (L), capacitance (C), and resistance (R).
• Displays secondary parameters: Quality Factor (Q), Dissipation (D), Phase (P), and Equivalent Series Resistance (ESR).
• Dual backlit display with 20,000/2,000 count for primary and secondary parameters.
• Supports Open and Short calibration to eliminate stray impedance.
• Five selectable test frequencies: 100Hz, 120Hz, 1kHz, 10kHz, 100kHz.
• Selectable series or parallel circuit measurement modes.
• Adjustable limit settings (Hi/Lo) using absolute values or percentages.
• Auto Power Off function (with override option).
• Low battery indicator.

3. Package Contents

The Extech LCR200 package includes:

• Extech LCR200 Passive Component LCR Meter
• Built-in test fixture
• External test leads with alligator clips
• 9V battery

4. Product Overview

The Extech LCR200 meter is designed for ease of use and accurate component testing. Below is an image illustrating the meter's display, control buttons, and input terminals.

The front panel includes a large LCD for displaying measurement results, function buttons (FREQ, HOLD, L/C/R, CAL, D/Q/θ, REL/%/↑, ENTER, SER/PAR, SORT, SETUP, Power, Backlight), and input jacks for connecting test leads. A 'GUARD' terminal is also present for advanced measurement configurations.

5. Setup

5.1 Battery Installation

The LCR200 operates on a single 9V battery. To install or replace the battery:

1. Locate the battery compartment cover on the rear of the meter.
2. Remove the screw(s) securing the cover and open it.
3. Connect a new 9V battery to the battery connector, observing correct polarity.
4. Place the battery into the compartment and replace the cover, securing it with the screw(s).

5.2 Initial Power On

Press the Power button (red circle with line) to turn the unit on. The meter will perform a brief self-test before entering the default measurement mode.

6. Operating Instructions

6.1 Measurement Modes (L/C/R)

Press the L/C/R button to cycle through Inductance, Capacitance, and Resistance measurement modes. The meter can also automatically detect the component type.

6.2 Secondary Parameter Display

Press the D/Q/θ button to cycle through the display of secondary parameters: Dissipation (D), Quality Factor (Q), Phase (θ), and Equivalent Series Resistance (ESR).

6.3 Test Frequency Selection

Press the FREQ button to select one of the five available test frequencies: 100Hz, 120Hz, 1kHz, 10kHz, or 100kHz. The optimal frequency depends on the component type and value being measured.

6.4 Open and Short Calibration

To ensure accurate measurements by removing stray impedances from test leads or the built-in fixture, perform an Open and Short calibration:

1. With no component connected to the test terminals, press the CAL button to perform an Open circuit calibration.
2. Short the test terminals (e.g., by connecting the test leads together or inserting a shorting bar into the built-in fixture), then press the CAL button again to perform a Short circuit calibration.

6.5 Series/Parallel Measurement Modes

Press the SER/PAR button to switch between series and parallel circuit measurement modes. The meter can also automatically select the appropriate mode.

6.6 Data Hold Function

Press the HOLD button to freeze the current reading on the display. Press it again to release the hold and resume live measurements.

6.7 Component Sorting (Hi/Lo Limits)

The SORT function allows you to set Hi/Lo limits for component testing, enabling quick sorting of components based on tolerance. Use the navigation buttons to set the reference value and tolerance percentage.

6.8 Auto Power Off

The meter automatically powers off after 5 minutes of inactivity to conserve battery life. This feature can be disabled if continuous operation is required (refer to the full manual for specific instructions).

7. Maintenance

7.1 Battery Replacement

When the low battery indicator appears on the display, replace the 9V battery as described in Section 5.1.

7.2 Cleaning

Wipe the meter's casing with a dry, soft cloth. Do not use abrasive cleaners, solvents, or harsh chemicals, as these may damage the plastic components or display.

7.3 Storage

If the meter is not to be used for an extended period, remove the battery to prevent leakage. Store the device in a dry, dust-free environment away from direct sunlight and extreme temperatures.

8. Troubleshooting

• No Display or Power On: Ensure the 9V battery is correctly installed and has sufficient charge. Replace the battery if necessary.
• Inaccurate Readings: Perform an Open and Short calibration (Section 6.4). Verify that test leads are securely connected. Select the appropriate test frequency and series/parallel measurement mode for the component being tested.
• Difficulty with Built-in Test Fixture: Some users may experience stiff internal contacts in the built-in test fixture, making it difficult to insert component leads without bending them. If this occurs, utilize the external test leads with alligator clips provided with the meter for easier connection.
• Data Out Port Not Functioning: The 'Data Out' port on the LCR200 model is not implemented for data transmission. This is a design specification and not a malfunction.

9. Specifications

10. Optional Accessories

Extech offers additional accessories to enhance the functionality of your LCR200 meter:

• LCR203 Tweezer Test Leads: Designed for convenient connection and testing of small chip components.
• LCR205 SMD Test Fixture: A specialized fitting that plugs into the meter's integral connectors, allowing for precise testing of surface mount device (SMD) components.

11. Warranty and Support

For detailed warranty information, technical assistance, or to inquire about service, please contact Extech customer support directly or visit the official Extech website. Keep your purchase receipt as proof of purchase for warranty claims.