Woods DMMW1 Subcompact DMM Manual

Introduction

This manual provides detailed instructions for the safe and effective use of the Southwire Woods DMMW1 Subcompact Digital Multimeter. It is designed for basic electrical testing and offers 6 test functions with up to 16 measuring ranges. Please read this manual thoroughly before operating the device to ensure proper usage and safety.

Safety Information

Always observe standard safety precautions when using any electrical testing equipment. Failure to do so may result in injury or damage to the meter or equipment under test.

• Do not apply voltage or current to the meter that exceeds the specified maximum limits for each range. The DMMW1 is rated CAT III 300V and CAT II 600V.
• Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
• Ensure the test leads are in good condition, without any cracks or broken insulation.
• Always disconnect the test leads from the circuit before changing the function switch position.
• Do not operate the meter if it appears damaged or if the case is open.
• Replace the battery immediately when the low battery indicator appears to ensure accurate readings.
• The 200mA input is fused. Ensure the correct fuse type is used for replacement.

Product Overview

The Woods DMMW1 is a compact digital multimeter designed for portability and ease of use. It features a clear digital display and a rotary switch for selecting various measurement functions.

Setup

1. Battery Installation

The DMMW1 requires one A23 (12-volt) battery for operation. A battery is typically included. To install or replace the battery:

1. Ensure the meter is turned off and test leads are disconnected.
2. Locate the battery compartment on the back of the meter.
3. Open the compartment cover (usually secured by a screw or latch).
4. Insert the A23 12V battery, observing the correct polarity (+ and -).
5. Close the battery compartment cover securely.

2. Connecting Test Leads

Connect the black test lead to the "COM" (common) input jack. Connect the red test lead to the "VΩmAµA" input jack for most measurements (voltage, resistance, diode, and current up to 200mA).

Operating Instructions

Power On/Off

Press the red power button (labeled with a circle and vertical line) to turn the meter on or off. The meter does not have an automatic shutoff feature, so remember to turn it off manually after use to conserve battery life.

Function Selection

Rotate the central switch to select the desired measurement function and range. Always start with the highest range if the approximate value of the measurement is unknown, then switch to a lower range for better resolution if necessary.

1. DC Voltage Measurement (V DC)

• Set the rotary switch to the desired DC Voltage range (e.g., 500V, 200V, 20V, 2000mV, 200mV).
• Connect the red test lead to the positive (+) side of the circuit and the black test lead to the negative (-) side.
• Read the voltage value on the display. If a negative sign appears, it indicates reversed polarity.

2. AC Voltage Measurement (V AC)

• Set the rotary switch to the desired AC Voltage range (e.g., 500V, 200V, 20V, 2000mV, 200mV).
• Connect the test leads across the AC voltage source.
• Read the voltage value on the display.

3. Resistance Measurement (Ω)

• Ensure the circuit is de-energized before measuring resistance.
• Set the rotary switch to the desired Resistance range (e.g., 200Ω, 2000Ω, 20kΩ, 200kΩ, 2000kΩ).
• Connect the test leads across the component or circuit to be measured.
• Read the resistance value on the display. Note that at higher resistances (100K ohms and up), the DMMW1 may take several seconds for its reading to stabilize.

4. Current Measurement (mA/µA)

• Ensure the circuit is de-energized before connecting the meter in series.
• Set the rotary switch to the desired Current range (e.g., 2000µA, 200mA).
• Open the circuit where current is to be measured and connect the meter in series. The red lead goes to the higher potential side, and the black lead to the lower potential side.
• Apply power to the circuit and read the current value on the display.
• Caution: The 200mA input is fused. Do not attempt to measure currents exceeding 200mA on this range.

5. Diode Test (▲)

• Set the rotary switch to the Diode Test position (triangle symbol).
• Connect the red test lead to the anode and the black test lead to the cathode of the diode. A forward voltage drop will be displayed.
• Reverse the leads. The display should show "OL" (Open Loop) for a good diode.

6. Continuity Test (🔊)

• Set the rotary switch to the Continuity Test position (speaker symbol).
• Connect the test leads across the circuit or component.
• If the resistance is below a certain threshold (typically around 30-50 ohms), the meter will emit an audible beep, indicating continuity.

7. Battery Test (BATT)

• Set the rotary switch to the 9V BATT or 1.5V BATT position.
• Connect the red test lead to the positive (+) terminal of the battery and the black test lead to the negative (-) terminal.
• Read the battery voltage on the display. This function applies a load to the battery for a more accurate assessment of its condition.

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 readings.

Maintenance

Cleaning

Wipe the meter's case with a damp cloth and mild detergent. Do not use abrasives or solvents. Keep the input terminals free of dirt and moisture.

Battery Replacement

Refer to the "Setup" section for instructions on replacing the A23 (12V) battery. Replace the battery when the low battery indicator appears on the display to ensure accurate measurements.

Fuse Replacement

The 200mA input is protected by a fuse. If the meter fails to measure current on the mA/µA ranges, the fuse may need replacement. This should only be performed by qualified personnel. Ensure to use a fuse with the correct rating (e.g., 200mA, 250V fast-blow type) to maintain safety and performance.

Troubleshooting

• No Display / Meter Does Not Turn On: Check the battery. Ensure it is correctly installed and has sufficient charge. Replace if necessary.
• "OL" (Overload) Display: The measured value exceeds the selected range. Switch to a higher range or check if the circuit is open.
• Incorrect Readings:
  • Ensure the correct function and range are selected.
  • Check test lead connections; ensure they are fully inserted and not damaged.
  • Verify the battery is not low.
  • Ensure the circuit is de-energized for resistance and continuity measurements.
• No Current Measurement: Check the 200mA fuse. If blown, replace it with the correct type and rating.

Specifications

Warranty and Support

For warranty information or technical support regarding your Southwire Woods DMMW1 Digital Multimeter, please contact Southwire customer service directly. Refer to the product packaging or the official Southwire website for the most current contact details and warranty terms.