1. Introduction and Overview
The Escort EDM 1111A is a versatile digital multimeter designed for accurate measurement of various electrical parameters. This device is essential for electricians, technicians, and hobbyists for testing circuits, components, and power sources. It features a clear digital display and a rotary dial for selecting different measurement functions.
The Escort EDM 1111A Digital Multimeter with red and black test leads connected, ready for use.
Key functions include:
- DC Voltage (DCV) measurement
- AC Voltage (ACV) measurement
- DC Current (DCA) measurement
- AC Current (ACA) measurement
- Resistance (Ω) measurement
- Capacitance (CX) measurement
- Diode and Transistor (hFE) testing
2. Setup
2.1 Battery Installation
The Escort EDM 1111A requires a DC 9V 006P battery for operation. To install or replace the battery:
- Ensure the multimeter is turned OFF.
- Locate the battery compartment on the back of the unit.
- Carefully slide open or unscrew the battery cover.
- Insert a new 9V 006P battery, observing the correct polarity (+/-).
- Replace the battery cover securely.
The rear view of the Escort EDM 1111A Digital Multimeter, showing the battery compartment cover and the product label.
2.2 Connecting Test Leads
The multimeter comes with two test leads, typically one red (positive) and one black (negative/common). Proper connection is crucial for accurate and safe measurements.
- For most voltage, resistance, and low current measurements, connect the black lead to the 'COM' (Common) jack.
- Connect the red lead to the 'V-Ω-mA' jack for voltage, resistance, and milliampere current measurements.
- For high current measurements (up to 10A), connect the red lead to the '10A' jack. Always ensure the correct jack is used to prevent damage to the meter or circuit.
A closer look at the input jacks (V-Ω, COM, mA, 10A) and the lower portion of the rotary dial, indicating current measurement ranges.
The red and black test probes (leads) used with the Escort EDM 1111A Digital Multimeter, featuring pointed tips for electrical contact.
3. Operating Instructions
Before taking any measurements, ensure the test leads are correctly connected and the rotary dial is set to the appropriate function and range.
Detailed view of the rotary selector dial on the Escort EDM 1111A Digital Multimeter, displaying various measurement functions such as DCV, ACV, Ω, DCA, ACA, and CX.
3.1 Measuring DC Voltage (DCV)
- Set the rotary dial to the desired DCV range (e.g., 200m, 2, 20, 200, 1000). Choose a range higher than the expected voltage.
- Connect the red lead to the positive (+) side of the circuit and the black lead to the negative (-) side.
- Read the voltage value on the display.
3.2 Measuring AC Voltage (ACV)
- Set the rotary dial to the desired ACV range (e.g., 200m, 2, 20, 200, 750). Choose a range higher than the expected voltage.
- Connect the test leads across the AC voltage source. Polarity does not matter for AC voltage.
- Read the voltage value on the display.
3.3 Measuring Resistance (Ω)
- Ensure the circuit or component is de-energized before measuring resistance.
- Set the rotary dial to the desired Ω range (e.g., 200, 2K, 20K, 200K, 2M, 20M, 200M).
- Connect the test leads across the component to be measured.
- Read the resistance value on the display.
3.4 Measuring DC Current (DCA)
- Ensure the circuit is de-energized.
- Set the rotary dial to the desired DCA range (e.g., 200µ, 2m, 20m, 200m, 10A).
- Important: For currents up to 200mA, use the 'V-Ω-mA' jack for the red lead. For currents up to 10A, use the '10A' jack.
- Break the circuit and connect the multimeter in series with the load. The current must flow through the multimeter.
- Re-energize the circuit and read the current value.
3.5 Measuring AC Current (ACA)
- Ensure the circuit is de-energized.
- Set the rotary dial to the desired ACA range (e.g., 200µ, 2m, 20m, 200m, 10A).
- Important: For currents up to 200mA, use the 'V-Ω-mA' jack for the red lead. For currents up to 10A, use the '10A' jack.
- Break the circuit and connect the multimeter in series with the load.
- Re-energize the circuit and read the current value.
3.6 Measuring Capacitance (CX)
- Ensure the capacitor is fully discharged before testing.
- Set the rotary dial to the CX range (e.g., 2n, 20n, 200n, 2µ, 20µ).
- Connect the test leads across the capacitor terminals.
- Read the capacitance value on the display.
3.7 Diode and Transistor (hFE) Testing
Refer to the specific markings on the dial for diode and transistor testing functions. Typically, diode test mode allows checking the forward voltage drop of a diode, and hFE mode is used for measuring the DC current gain of transistors.
4. Maintenance
4.1 Battery Replacement
Replace the 9V 006P battery when the low battery indicator appears on the display or if the multimeter fails to power on. Follow the instructions in Section 2.1.
4.2 Cleaning
To clean the multimeter, use a soft, damp cloth. Do not use abrasive cleaners or solvents, as they may damage the casing or display. Ensure the device is turned off and disconnected from any circuits before cleaning.
4.3 Storage
When not in use for extended periods, store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures. Consider removing the battery to prevent leakage, which could damage the internal components.
5. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No display or dim display | Low or dead battery | Replace the 9V 006P battery. |
| Incorrect readings | Incorrect range selected Poor lead connection Damaged test leads Incorrect input jack used | Select the appropriate range. Ensure leads are firmly connected. Inspect and replace damaged leads. Verify leads are in the correct V-Ω-mA or 10A jack. |
| "OL" (Overload) displayed | Measurement exceeds selected range | Switch to a higher range. |
| No continuity beep | Continuity function not selected Open circuit | Ensure dial is on continuity/diode test. Check the circuit for breaks. |
6. Specifications
| Parameter | Value |
|---|---|
| Model | EDM 1111A |
| Product Dimensions (L x W x H) | 8 x 4 x 2 inches |
| Item Weight | 1.84 Pounds |
| Power Source | DC 9V 006P Battery |
| Measurement Type | Multimeter |
| Manufacturer | Escort |
| Date First Available | November 21, 2019 |
| DC Voltage Ranges | 200mV, 2V, 20V, 200V, 1000V |
| AC Voltage Ranges | 200mV, 2V, 20V, 200V, 750V |
| DC Current Ranges | 200µA, 2mA, 20mA, 200mA, 10A |
| AC Current Ranges | 200µA, 2mA, 20mA, 200mA, 10A |
| Resistance Ranges | 200Ω, 2KΩ, 20KΩ, 200KΩ, 2MΩ, 20MΩ, 200MΩ |
| Capacitance Ranges | 2nF, 20nF, 200nF, 2µF, 20µF |
7. Warranty Information
For specific warranty details regarding your Escort EDM 1111A Digital Multimeter, please refer to the documentation provided at the time of purchase or contact the manufacturer directly. Warranty terms typically cover defects in materials and workmanship under normal use.
8. Customer Support
If you encounter any issues or have questions not covered in this manual, please contact Escort customer support. Have your product model number (EDM 1111A) and serial number (if applicable, found on the back label) ready when contacting support for faster assistance.
The product label on the back of the Escort EDM 1111A, indicating 'DIGITAL MULTIMETER DC 9V 006P BATTERY', serial number, and 'MADE IN TAIWAN R.O.C.'.
