Model
Instruction
Manual
R9300
Combustible Gas Leak
Detector
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Table of Contents
Safety ...................................................................................................... 2-3
Features .......................................................................................................3
Instrument Description ................................................................................3
Specications ..............................................................................................4
Operating Instructions .................................................................................5
Battery Replacement ...................................................................................6
Sensor Replacement ...................................................................................6
Safety
Before using this instrument, read all safety information carefully. In this
manual the word “WARNING” is used to indicate conditions or actions
that may pose physical hazards to the user. The word “CAUTION” is used
to indicate conditions or actions that may damage this instrument.
If you are using your Combustible Gas Leak Detector as a result of a
service call, chances are someone has either smelled a combustible gas
leak or someone has reason to believe gas may be leaking. While your
Combustible Gas Leak Detector is designed to function without producing
sparks or otherwise igniting the gases it detects, the environment you are
responding to probably has no such safeguards. Most combustible gas
leaks are noticed long before concentration levels build up to the point
that explosion hazards exist.
If you feel an explosion hazard exists:
• Arrange for evacuation of people in the area
• Call proper authorities from a safe location
• Shut off gas source, if possible
• Ventilate enclosed areas if possible to do so without risk of ignition
• DO NOT switch on power in area in question
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As a matter of routine, ventilate the area you plan to work in. Ventilation
will help ensure the gas does not accumulate in large volume where it
can attain its Lower Explosive Limit (LEL).
Lower Explosive Limit (LEL): The point at which a combustible gas, when
mixed with air, has developed the minimum concentration to combust
when exposed to a source of ignition. The LEL is usually stated as a
percentage of gas in air, as a fuel-air-ratio, or as parts-per-million (PPM).
Features
• Detects a wide range of combustible gases including; gasoline, propane, natural gas and fuel oil
• High sensitivity detects small leaks
• Designed for one-handed operation
• 16” (406mm) gooseneck for hard to reach areas
• User adjustable sensitivity wheel
• Alarm set at 10% LEL for methane
• Earphone jack for loud environments (earphones sold seperately)
• Tricolor visual indicator
• Audible (variable tick rate) and visual (LED) alarm indicators
• User replaceable sensor
Instrument Description
1. Sensor Tip Guard & Sensor (internal)
2. Gooseneck Probe
3. Alarm Light
4. Ready Light (Power-On)
5. Power ON/OFF Slide Switch
6. Earphone Jack
7. Tick Rate (Sensitivity) Adjustment
8. Probe Clip
9. Handle
10. Battery Cover
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Specifications
Detected Gases: Methane, Natural Gas, Benzene,
Sensitivity: 50ppm (methane)
General Specifications
Sensor Type: Heated semiconductor gas sensor
Alarm: Audible (buzzer) and
Alarm Limit:
Sensitivity Settings: Adjustable Wheel
Warm-up Time: Approx. 5 mins
Response Time: Less than 2 seconds
Earphone Jack: Yes
Power Supply: 3 C Batteries
Battery Life: Approx. 8 hours
Product Certications: CE
Probe Length: 16” (406mm)
Operating Temperature: 32 to 122°F (0 to 50°C)
Storage Temperature: 14 to 140°F (-10 to 60°C)
Operating Humidity Range: 10 to 90%
Dimensions: 8.7 x 2.8 x 1.8” (221 x 72 x 46mm)
Weight: 18.4oz (520g)
Optional Accessories: Replacement Sensor Tip (R9300-RS)
Ethane, Propane, Butane, Acetone,
Alcohol, Ammonia, Gasoline, Jet Fuel,
Industrial Solvents, Lacquer, Paint
Thinner, Naptha
Visual (LED indicator)
Set at 10% LEL for Methane
(Can be calibrated for other
concentrations or gases up to 40% LEL)
Soft Carrying Case (CA-05A)
Replacement Reference Leak Source
(LC-R01)
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Operating Instructions
Switch on the Combustible Gas Leak Detector by sliding the ON/OFF button and the READY light is glowing. The gas leak detector runs through a
one-minute warm-up and self-zeroing sequence when it is rst turned on
in fresh air. The alarm of the instrument may be very loud without contact
with any gas, that is caused the initial preset sensitivity.
Rate (Sensitivity) Adjustment
Each time the instrument is put into service, you should conduct a quick
functional test. Adjust the tick rate to non-alarm level. Then, simply expose the sensor to a known leak, like a cigarette lighter, or pass the probe
over a drop of combustible uid. After the initial warm-up, the instrument
can be used to detect combustible gases. When the sensor in the probe
tip detects a combustible gas, the tick rate will increase and the instrument sounds a warbling tone while the ALARM light. As the concentration
of gas increases, so does the tick rate.
If the situation calls for quiet operation, or if background noise makes it
difcult to hear the built-in speaker, you can use an earphone. The jack
is at the top of the instrument. Note that listening to the alarm or tick
through the earphone is very loud.
If the READY light is off, the batteries are low. They should be replaced
immediately. Low batteries will adversely affect the instrument’s reliability.
See battery replacement procedures.
Adjusting the Tick Rate (Sensitivity)
The tick rate tells you when the sensor (in the tip of the instrument) is
getting close to a gas leak. You can control the tick rate using the rotary
wheel in the center of the instrument.
• Move the wheel clockwise to increase the frequency
• Move the wheel counter-clockwise to decrease the frequency
A tick rate of 4 to 8 ticks per second, in fresh air, is typical. As the sensor
comes near a combustible gas source, the tick rate increases. In order
to isolate the source of a leak, you may need to move the wheel counter
clockwise, decreasing the sensitivity, as the sensor moves closer.
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Battery Replacement
1. Before replacing the batteries make sure to turn off your instrument.
2. To remove the battery cover apply pressure and push away from the
meter. Slide the cover out of the tracks.
3. Replace all three batteries with new ones.
4. Replace the battery cover by sliding it into place.
Sensor Replacement
Although the sensor is designed to offer many years of reliable service, it
may become inoperable if it is submerged in liquid or otherwise physically
damaged.
To replace sensor:
1. Turn the instrument off
2. Remove the upper tip guard by pressing straight up from the alignment
notch that separates the two halves of the tip guard.
3. This is a sturdy component, but use caution bending its leads.
4. Pull the sensor straight up from its tip housing.
5. Replace the sensor, pressing it straight in.
6. Reassemble in reverse order.
For service on this or any other REED product or information on other
REED products, contact REED Instruments at info@reedinstruments.com.
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