Elitech HLD-200 Halogen Leak Detector User Manual
- June 17, 2024
- Elitech
Table of Contents
Elitech HLD-200 Halogen Leak Detector
Introduction
- The HLD-200 is the most reliable negative corona halogen leak detector at present. We integrate all our experience and customers’ feedback into this product, in the hope that it could provide our customers with the best price, performance, and reliability.
- The sensitive elements adopt the advanced and reliable corona refrigerant sensor which has great sensitivity and excellent repeatability; the test program is controlled by the artificial intelligent microcomputer, with reasonable work procedure, easy and convenient to operate, complete functions, and multiple self-adaptive capabilities; Dual-color LED indicator lights, with visual Figure 1 and clear display; the smart and portable design is convenient for your mobile operation. When there is excessive refrigerant in the leak gas, this unit will automatically audio alarm to effectively test the refrigerant leak.
Technical features
- Adopt advanced, low power consumed, eight-bit microprocessor controller
- Dual-color LED indicator lights with progressive and real-time display
- Sensitivity adjustable, seven-level alarming indicated by LED display
- Modular sensor, convenient for maintenance
- Seven levels of audible and visual alarm
- Auto reset testing when the detector is turned on
- Battery voltage indication
Technical parameters
- Sensor type: negative corona sensor
- Ultimate sensitivity: 3 g/yr
- Warm-Up Time: 5s
Application:
Detect leaks in other systems and filling vessels. It will respond to all halogenated (including Chlorine and Fluorine) refrigerants. This includes, but is not limited to:
- CFCs e.g.R12,R11 ,R500,R503 etc .. .
- HCFCs e.g.R22,R123,R124,R502 etc .. .
- HFCs e.g.R134a,R404a,R125 etc …
- Mixtures such as AZ-50.HP62.MP39 etc .. .
Detect Ethylene Oxide gas leaks in hospital sterilizing equipment
Detect SF-6 in high-voltage circuit breakers
Detect most gases that contain chlorine, Fluorine and Bromine (halogen gases)
Detect cleaning agents used in dry cleaning applications such as
perchloroethylene.
- Operating Environment: Temperature: 0°C~ 52 °C
- Humidity: < 95% RH (non-condensing)
- Power supply: two AA alkaline batteries
- Sensor tip life under continuous operation: more than 50 hours in normal detecting status
- Specification: 175 x 55 x 34 (mm)
- Probe length: 305mm
Operation instruction and battery replacement
Operation instruction:
- ON/OFF key: press it to turn on/off the detector.
- SENS key: it is a sensitivity adjustment key, it could adjust the sensitivity level according to the detection demands(max level:?). The LED light will indicate the level of sensitivity, meanwhile the frequency of audible alarm changes. The higher the sensitivity level it is, the faster the alarm frequency is.
- RESET key: Reset the background halogen level to “zero”, any leak sources higher than this “zero” level are considered to be a leak and trigger the alarm.
The interface and keys of the halogen leak detector
- Flexible probe
- Buzzer
- Leakage indicator (the first light could indicate batteries voltage)
- Power ON/OFF
- Sensitivity adjustment
- Reset
- Sensing tip
Battery Installation
WARNING! To reduce the risk of igniting flammable gases in a closed atmosphere, batteries must only be replaced in an open area or closed space without flammable gas.
- Battery voltage indication:
- Users can check the battery level in the standby mode by the battery level indicator light. At different battery level, the color of the power indicator light will change accordingly. They have relations as follows:
- Green – meets requirements for normal work.
- Orange – low battery working state.
- Red – below the permitted working voltage, please replace the batteries as soon as possible.
- Battery replacement and installation, as shown in Figure 3:
- See Figure 3. Use a thumb to push open the battery door located at the bottom of the detector; then remove the door.
- Install two AA alkaline batteries into the detector, pay attention to the polarity markings on the side of the case and then place the battery door back.
Detecting method
Halogen leak detector operation method:
When the detector is turned on or off by pressing the ION/OFF I key, all LED
indicator lights are on for three seconds, and the detector will automatically
reset. After auto-reset, only the first LED indicator light on the left will
be on. (Green, batteries fine, orange, batteries getting weak, replace as soon
as possible; red indicates the batteries need to be replaced before normal
detecting). At this time the beeping sounds regularly and the detector sets
the atmosphere halogen level to “zero”, ready for detection. Operation
Instruction
- Check the battery level by observing the power indicator light.
- Once turn on the detector, the default sensitivity level is level 5. You will hear a rapid, but steady beep sound. The sensitivity can be adjusted by pressing ISENSI, according to your requirement.
- Begin searching for leaks. When refrigerant is detected, a siren will be sounded, with a rate quite different from the previous beep sound. And the indicator lights will progressively turn on.
- Sensitivity can be adjusted at any time during operation by pressing ISENSI key. This adjustment will not interrupt detection.
- If an alarm occurs before the sensing tip touches the leakage source, press I RESET I key to reset the current to O until there is no alarm, then you can detect again
Halogen leak detector detecting method:
See Figure 4
- Visually examine the refrigeration system. The oily and dirty spots, node valves, coils, connectors, or pipelines are the areas most likely to leak gases.
- Start leak detecting at the joint at a speed of 1 cm /s and the distance between the sensor tip and the joint should be 1-3cm.
- When an alarm is triggered, it may indicate a leak is close by. Detect around that area again and see if the alarm is repeatable. If a leak is confirmed, pinpoint the leak source by moving slowly from the no-leaking (no-alarm) area to the leaking area from different directions. Besides, you could also pinpoint the leak by moving the detector away from the leaking area and resetting the unit, adjusting the sensitivity lower and repeating the above process. Once confirmed, mark around the leak and continue detecting the whole line of the system.
- Additional work may be needed to eliminate possible ambiguity, such as, other contaminants at the spot may also make the detector work abnormally. Please clean the leaking area with dry cloth and blow clean dry air to the leaking area and repeat step 3 above to confirm the leak.
- Leak on the evaporator coil is more difficult to detect than in other areas because it is difficult for the sensor tip to access to the whole evaporator coil. Most evaporator coils are composed of modules and are installed in a closed space with fan for heat exchange. The system with the fan should be turned on for 10 seconds and then turned off the fan, wait 10-15 minutes at the evaporator, then use the detector to detect the outlet of the condensate (make sure the sensor tip doesn’t touch with the condensate), or detect the air inside the evaporator chamber. Most halogens are lighter than the air and likely to accumulate at the highest spot in the closed space. An alarm may indicate a leak at the evaporator coil, but it is hard to repair the evaporator by pinpointing the precise leak location. In most cases, the whole coil has to be replaced.
Notes before leak detecting:
- To detect a leak in a refrigeration system, the system must have normal operating pressure, or at least partially reach to minimum 50 PSI. Low environmental temperature (lower than 59°F or 15 °C) may lower the system-required pressure and may make the leak less likely to be detected. No leak detected does not mean the system does not have gas leak. Check the pressure before concluding.
- Leaking areas are usually covered with contaminants such as compressor oil or dirt, be careful not to let the sensor tip in contact with these contaminants.
- This product’s function is to detect the halogen’s relative change at the sensor tip. Pinpointing the leak source needs to manually adjust the sensitivity and resetting the detector by the technician. You could follow the recommendations below:
- In areas where the atmosphere is contaminated with halogen refrigerant, press the reset key to “ignore”the leak in the background. Make sure not to move the sensor tip away from the contaminated background while resetting the detector.
- In windy areas, the leaked halogen refrigerant may be quickly diluted or removed from the leak source. The technician may use a windshield to isolate the leak area or temporarily turn off the fan.
- To avoid false alarms, prevent the sensor tip from touching any moisture or other solvent.
Maintenance
-
Proper maintenance is important and may extend the service life and improve the performance of your detector.
Warning : Turn the power off before replacing the sensor tip. Voltage across the tip may pose an electrical hazard. -
Keep the sensor tip clean: Use cotton cloth or dry air to clean the shield on the sensor tip if ii gets contaminated. If the sensor tip itself is contaminated, soak the tip in absolute alcohol for a few minutes, and then use compressed air to blow it dry, or dry it with cloth.
Note : Never use strong solvents such as Gasoline, mineral oil, turpentine, these solvents may coat the sensor with a thin film reduce the sensitivity of the detector, and make the detector slow to respond to a leak. -
Put the detector and the tip in a dry and clean place; remove the batteries if the detector is not used for a long time.
Troubleshooting
-
The detector could not turn on
Possible reasons:-
A. The energy of batteries is too low to turn on.
Solution: Please replace new batteries. -
B. The pole piece of battery connector has been oxidized.
Solution: Please scrape the oxidization layer.
-
-
The detector could not respond to a confirmed leak
Possible reason: Sensor tip is aged.
Solution: Please change a new sensor as soon as possible. -
The detector gives false alarm when there is no halogen present Possible reason: Atmospheric composition has changed.
Solution: Please press I RESET I key to set the background to “zero” level, try to avoid the change of temperature or humidity.
References
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