Klein Tools ET120 Combustible Gas Leak Detector Instruction Manual

1. Introduction

The Klein Tools ET120 is a professional-grade combustible gas leak detector designed for HVAC professionals and general household use. It provides audible and visual alarms to indicate the presence of methane, propane, and other combustible gases. This manual provides essential information for the safe and effective operation of your ET120 gas leak detector.

Figure 1: Front view of the Klein Tools ET120 Gas Leak Detector.

2. Safety Information

WARNING: This Gas Detector is NOT intended for use as personal protective equipment (PPE). Always read, understand, and follow all instructions to ensure safe operation. Always turn on the gas detector in an area known to be free of combustible gases.

• Do not use the device if it appears damaged.
• Ensure proper ventilation when investigating gas leaks.
• Keep the device away from extreme temperatures and moisture.
• Replace batteries promptly when the low battery indicator appears.

3. Product Features

• Wide Detection Range: Detects gas concentrations from approximately 50 to 10,000 ppm (based on Methane).
• Adjustable Sensitivity: Offers High (50 to 1000 ppm) and Low (1000 to 10,000 ppm) sensitivity levels.
• Enhanced Alerts: Features five red LEDs (visual) and an 85dB audible alarm that intensifies with increasing gas concentration.
• Automatic Calibration: Performs automatic zero-point calibration at power-up for accuracy.
• Flexible Gooseneck: An 18-inch flexible gooseneck expands the sensor's reach and clips onto the meter for storage.
• Durable Design: Over-molded body provides a comfortable grip and is built for demanding environments.
• Battery Saving: Auto power-off after 10 minutes of non-usage conserves battery life.

Figure 2: Key features of the ET120 Gas Leak Detector.

4. Setup

4.1 Battery Installation

The Klein Tools ET120 requires 4 AAA batteries (included). To install or replace batteries:

1. Locate the battery compartment cover on the back of the device.
2. Open the cover and insert 4 AAA batteries, ensuring correct polarity (+/-).
3. Securely close the battery compartment cover.

Figure 3: Battery compartment with batteries installed.

4.2 Initial Calibration

The ET120 features automatic zero-point calibration. When the device is powered on, it will automatically calibrate itself to the ambient air. Ensure the device is powered on in an area known to be free of combustible gases for accurate calibration. Flashing lights will indicate the self-calibration process.

5. Operating Instructions

5.1 Power On/Off

• To power on, press and hold the power button until the device activates.
• The device will perform an automatic self-calibration.
• To power off, press and hold the power button. The device also features an auto power-off function after 10 minutes of inactivity.

5.2 Adjusting Sensitivity

The ET120 offers two sensitivity modes:

• High Sensitivity: Approximately 50 to 1000 ppm. Use for detecting smaller leaks or when precise location is needed.
• Low Sensitivity: Approximately 1000 to 10,000 ppm. Use for detecting larger leaks or initial scanning of an area.

Press the 'LOW' or 'HIGH' buttons on the device to switch between sensitivity modes.

5.3 Gas Detection Process

To detect gas leaks:

1. Ensure the device is powered on and calibrated.
2. Extend the 18-inch flexible gooseneck to reach the area to be inspected. The gooseneck can be clipped onto the meter for convenient storage when not in use.
3. Slowly move the sensor tip of the gooseneck around potential leak sources.
4. Observe the five red LED indicators and listen for the audible alarm. The intensity of both the visual and audible alerts will increase as the gas concentration rises, indicating proximity to a leak.
5. Use the 'HOLD' button to freeze the current reading on the display if needed.

Figure 4: Using the ET120 to detect gas leaks.

5.4 Mute Function

The audible alarm can be muted by pressing the speaker icon button. Press it again to unmute.

6. Maintenance

• Cleaning: Wipe the device with a dry, lint-free cloth. Do not use abrasive cleaners or solvents.
• Storage: Store the device in its carrying pouch in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Care: Remove batteries if the device will not be used for an extended period to prevent leakage.

7. Troubleshooting

• Device not powering on: Check battery installation and ensure batteries are not depleted. Replace if necessary.
• Inaccurate readings: Ensure the device was calibrated in a clean, gas-free environment. Recalibrate if needed.
• No audible alarm: Check if the mute function is activated. Press the speaker icon button to unmute.

8. Specifications

9. Warranty and Support

For warranty information, please refer to the attached warranty document that came with your product. For technical support or further assistance, please contact Klein Tools customer service.