Elitech WJL-6000S Corona Detector

Contact Information

Elitech Technology, Inc.
2528 Qume Dr, Ste 2
San Jose, CA 95131 USA
Tel: +1 408-898-2866
Sales: sales@elitechus.com
Support: support@elitechus.com
Website: www.elitechus.com

Elitech (UK) Limited
Unit 13 Greenwich Centre Business Park
53 Norman Road, London, SE10 9QF
Tel: +44 (0) 208-858-1888
Sales: sales@elitech.uk.com
Support: service@elitech.uk.com
Website: www.elitech.uk.com

Elitech Brasil Ltda
R. Dona Rosalina, 90 - Igara, Canoas - RS,
92410-695, Brazil
Tel: +55 (51)-3939-8634
Sales: brasil@e-elitech.com
Support: suporte@e-elitech.com
Website: www.elitechbrasil.com.br

Overview

The WJL-6000S is a corona leak detector featuring high sensitivity and a visualized alarm display. Its adjustable sensitivity ensures automatic and optimal detection status, leading to more accurate leak location. The device boasts a subtle structure, a built-in high-precision stabilivolt IC, and an ultra-low power consumption circuit design for enhanced stability and battery life. The WJL-6000S detector is suitable for identifying leaks in cooling systems, stored refrigerants, and recovered containers. It responds to all halogenated refrigerants (containing chlorine and fluorine), including but not limited to CFCs (e.g., R12, R11, R500, R503), HCFCs (e.g., R22, R123, R124, R502), HFCs (e.g., R134a, R404a, R125), and blends like AZ-50, HP62, MP39. It also detects ethylene oxide leaks in hospital sterilizing equipment, halogen-carrying gases, SF-6 in high voltage circuit breakers, most halogen gases containing chlorine, fluorine, and bromine, cleaning agents like carbon tetrachloride, and Halon gas used in fire extinguishing systems.

Specifications

Structure

The WJL-6000S detector consists of the following components:

• ① Probe Tip
• ② Flexible Probe
• ③ Indicator (LEDs for leak and battery status)
• ④ Buzzer (Audible alarm)
• ⑤ Rotary Knob for ON/OFF and Sensitivity Adjustment
• ⑥ Battery Compartment
• ⑦ Shell (Main body of the detector)

Visual Description of the Device: The detector is a handheld unit with a black plastic casing. A flexible metal probe extends from the top. The front panel features a rotary knob for power and sensitivity, several indicator LEDs, and a buzzer. The battery compartment is located at the base.

Functions

Start-up Reset / Automatic Circuit

The WJL-6000S can ignore halogen concentrations in the environment through its functions:

Start-up Reset

Upon activation, the detector automatically calibrates for 6 seconds to disregard the current refrigerant concentration at the probe, entering an optimal detection state. If activated near a leak source, it can pinpoint leaks with higher concentrations. Alternatively, activating in fresh air and setting to maximum sensitivity allows detection of any leak above zero.

Automatic Circuit

During detection, the detector's automatic circuit adjusts to changes in ambient halogen concentration, helping to cancel false alarms.

Sensitivity Adjustment

The detector offers flexible sensitivity adjustment during operation. Rotating the knob clockwise increases sensitivity, while counterclockwise decreases it. Note that higher sensitivity does not always equate to better detection and may cause false alarms in environments with high gas concentrations.

Leak Alarm

When a leaking gas is detected, the buzzer frequency increases. The greater the leak, the faster the buzzer sounds. The first indicator LED flashes rapidly, and the other four LEDs illuminate based on the concentration of leaked gases.

Battery Indication

The first indicator LED displays both leak status and battery level:

• Blinks in Green: Battery voltage is normal.
• Blinks in Orange: Battery voltage is too low. Replace batteries promptly to prevent false alarms.

Operation

1. Rotate the knob to turn on the detector; the buzzer will beep intermittently.
2. Check the indicator to ensure the battery voltage is not low (LED blinks green).
3. Adjust to the appropriate sensitivity level or regulate it later during detection.
4. Begin detection 6 seconds after turning the detector on.
5. Locate the possible leak source where the buzzer will beep quickly.
6. Adjust the sensitivity level and continue detecting until the leak source is pinpointed.

Detection

General Notes:

• Adjust sensitivity higher if a leak is not detected.
• If the probe tip remains at a potential leak source during an alarm, the automatic circuit may adjust sensitivity and cancel false alarms.
• Finding leak sources in windy areas is difficult; shield such areas before detecting.
• Protect the probe tip from moisture or solvents, as this may trigger false alarms.

Detection Procedure:

1. Ensure sufficient refrigerant is charged into the air conditioner or cooling system, maintaining a minimum pressure of 340kPa (50psi) at shutdown. Leaks may not be detected below 15°C (59°F) due to insufficient pressure.
2. Avoid contaminating the probe tip when inspecting a dirty part. If heavily polluted or covered with condensation (like water or vapor), wipe the part with an industrial towel or blow it off with industrial air. Do not use detergents or solvents, as the sensor may be sensitive to them.
3. Visually inspect the entire cooling system, including pipelines, hoses, and components, for signs of oil leakage, damage, or corrosion. Use the probe tip to detect potential leak sources, focusing on fittings (e.g., hose to pipeline couplings), refrigerant control components, nut-sealed components, areas around copper pipes and welded joints, and fasteners.
4. Scan along the cooling system pipeline for a thorough inspection. If a leak is detected, continue scanning the rest of the pipeline. Move the probe tip around the suspected leak source at a speed of 25 to 50 mm/s (0.78 to 1.96 in/s) within a surface distance of 5mm (0.19 in) for optimal detection.
5. Rapid beeps indicate a possible leak source. Remove the detector, adjust sensitivity, and re-detect carefully until the source is pinpointed.
6. To verify a leak source, repeat the following steps as needed:
   • If necessary, blow industrial air into the suspected leak area and detect again. This is helpful for pinpointing large leaks.
   • Turn on the detector in fresh air. Hold the probe tip as close as possible to the alerted leak source. Move the detector around the leakage until it is confirmed.
7. For Automobile AC Systems:
   • To detect leaks in the evaporator core of the air-conditioning module, set the AC fan to its highest speed for at least 15 seconds.
   • Turn off the fan and wait 10 minutes for refrigerant to accumulate.
   • Place the probe tip into the fan resistor block or condenser water outlet (if no water), or evaporator heating/ventilation/AC opening (e.g., heat or vent pipe). If an alarm is triggered, the leak source is pinpointed.
8. Note:
   • Shut off the engine before detecting leaks in an automobile air-conditioning system.
   • It is recommended to check all maintenance and service parts after the cooling system has been maintained.

Maintenance

Proper maintenance is crucial for the detector's performance and lifespan. Follow these instructions to avoid misoperation:

• Keep the sensor clean during use. Prevent dust and oil contamination, and avoid contact with water.
• Do not disassemble the probe randomly. If the probe tip and air duct become blocked by pollutants, the detector will not function correctly. Unscrew the probe tip and clean it.
• Submerge the probe tip in a mild solution (e.g., high-purity alcohol) for a few seconds, then dry it with compressed air and a towel.

Troubleshooting Guide

Problem: The detector does not turn on

Possible Cause:

• A. Wrong battery installation direction. Solution: Ensure batteries are inserted correctly.
• B. Low battery. Solution: Replace with new batteries.
• C. Defective rotary knob. Solution: Turn the knob 10 times. If the detector still does not turn on, contact the seller.

Problem: The detector gives false alarm or does not respond to a known leak

Possible Cause:

• The sensor is contaminated, oxidized, or aged.
• Solution: Remove the sensor cap and wipe the sensor with mild alcohol. Reinstall and test after drying. If the issue persists, the sensor may be oxidized or aged; replace it with a new sensor as soon as possible.

Important Notes and Warnings

Important!

Please read and understand this manual thoroughly before operation and maintenance. Use 4 AAA alkaline batteries and never connect to an external power source. The detector will beep at a fixed frequency after being turned on; this frequency changes only after leaked refrigerant is detected. Do not touch the sensor during use to avoid minor electric shock. When the detector indicates low battery, change the batteries promptly to prevent false alarms. Remove batteries if the detector will not be used for an extended period and store it in a dry place.

Warning!

• ❌ Do NOT disassemble the detector yourself.
• ❌ Do NOT repair any internal parts yourself.
• ❌ Do NOT operate the detector in liquid, high-concentration gasoline, natural gas, propane, or other flammable gas environments.

Additional Notes:

• Never place the detector in gasoline, turpentine, or inorganic mineral solutions, as these may remain on the probe tip and reduce its sensitivity.
• Warning: Before unscrewing the probe tip, turn off the detector first to prevent the risk of electric shock.
• The probe's lifespan depends on the operating environment and frequency of use. If sensitivity decreases while battery voltage remains high, clean or replace the probe tip. If the detector fails to detect an obvious leak, replace the probe tip.
• If the detector malfunctions, check battery installation and voltage. If batteries are fine, check if the probe tip is polluted or has poor contact with the probe rod.
• Do not open the shell, as this will void the warranty service.

Meet Standards

EN14624, RoHS, CE