NGD8800 USER’S MANUAL COMBUSTIBLE GAS DETECTOR Please read this manual carefully and thoroughly before using this product.
CONTENT Page 1. GENERAL INFORMATION ------------------ 2 2. FEATURES ----------------------------------------- 2 3. SPECIFICATIONS ------------------------------- 3 4. OPERATION GUIDE --------------------------- 4 5. PARTS & CONTROLS ---------------------- 5-6 6. GETTING STARTED -------------------------- 7 6-1 Installing Batteries ------------------------- 7 6-2 Automatic Circuit/Reset Feature ------ 8 6-3 Feature Sensitivity Adjustment -------- 9 7. OPERATING PROCEDURES --------- 9-12 8.
COMBUSTIBLE GAS DETECTOR 1. GENERAL INFORMATION Thank you for purchasing this Combustible Gas Detector. Read though the instruction manual before operation for correct and safe usage. Please store and retain this instruction manual for future reference. 2. FEATURES This Combustible Gas Detector is extremely useful as a general purpose tool in any environment where propane, methane, natural gas, gasoline and fuel oil is used.
COMBUSTIBLE GAS DETECTOR Detect fuel in marine bilges Check manholes/sewers for safety Check for cracked heat exchangers Detect solvent residue 3.
COMBUSTIBLE GAS DETECTOR Warm-Up Time: Approximately 90 seconds Operating Temperature & Humidity: 32° to 104°F (0° to 40°C), < 80% RH Storage Temperature & Humidity: 14° to 140°F (-10° to 60°C), < 70% RH Altitude: <6500 ft. (2000m) 4. OPERATION GUIDE (1) This combustible gas detector unit is NOT designed for anti-explosive measures. Do not use this unit in an area where combustible gases can be found.
COMBUSTIBLE GAS DETECTOR 5.
COMBUSTIBLE GAS DETECTOR 1. Sensor 2. Sensor Protector 3. LED Leak Indicators 4. Sensitivity Lo Button 5. Sensitivity Hi Button 6. Low Battery Indicator 7. Power On/Off & Reset Button 8. Battery Cover 9.
COMBUSTIBLE GAS DETECTOR 6. GETTING STARTED 6-1 Installing Batteries Loosen the screw and remove the battery compartment door located on the bottom of the instrument as shown below (Fig.1) Install 4 “AA” size alkaline batteries Reinstall the battery cover by aligning it with the handle When the battery power is running low, the Red LED Low Battery indicator illuminates. The batteries should be then replaced as quickly as possible. 4 “AA” size alkaline batteries Fig.
COMBUSTIBLE GAS DETECTOR 6-2 Automatic Ambient Reset Feature This combustible gas detector features an Automatic Ambient Reset function that sets the unit to ignore ambient concentrations of combustible gas. Automatic Ambient Setup - Upon initial power on, the unit automatically sets itself (approx. 1.5 minutes) to ignore the level of combustible gases present at the tip. Only a level, or concentration, greater than this will cause an alarm.
COMBUSTIBLE GAS DETECTOR 6-3 Feature Sensitivity Adjustment The Instrument provides two levels of sensitivity. When the unit is switched on, it is set to the high sensitivity level by default. To change the sensitivity, press the the key is pressed, the visual key. When display will momentarily show the two left LED's (green) indicating Low Sensitivity level is selected. To switch back to High Sensitivity, press the key.
COMBUSTIBLE GAS DETECTOR z How to Find Leaks NOTE: A sudden whipping of the leak detector probe or "blowing" into the sensor tip will affect the air flow over the sensor and cause the instrument to alarm. (1) Power-Up & Reset function key: The key turns the combustible leak detector instrument ON or OFF and is also the reset function. Press it once to turn on the combustible leak detector. The display will illuminate with flash, for 1.5 minutes to heat up the sensor.
COMBUSTIBLE GAS DETECTOR (3) Enter the Measuring Mode Place the tip of the leak-detector probe as close as possible to the site of the suspected leak. Try to position the probe within 1/4 inch (6mm) of the possible leak source. Losing sensitivity gradually.
COMBUSTIBLE GAS DETECTOR Return the sensitivity switch to HIGH before searching for additional leaks. When finished leak testing, turn OFF the instrument and store it in a clean place. Protect the leak detector from possible damage. 8. REPLACING NEW SENSOR The sensor has a limited operative period. Under normal operation, the sensor should be replaced once a year. Exposing the sensor to high concentration of coolant (>30000ppm) will shorten its life cycle rapidly.
COMBUSTIBLE GAS DETECTOR Sensor protector Sensor Fig.2 9. CLEANING The Instrument plastic housing can be cleaned with standard household detergent or isopropyl alcohol. Care should be taken to prevent the cleaning fluid from entering the instrument. Gasoline and other solvents may damage the plastic and should be avoided. WARNING! Detergent or isopropyl alcohol may damage the sensor, please keep them away from the sensor during the cleaning process.
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