2. Important Notices on Safety
2-3. Precautions
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CAUTION
Never fail to perform a regular maintenance.
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Since this is a safety unit, a regular maintenance must be performed to ensure safety.
Continuing to use the gas detector without performing maintenance will compromise the
sensitivity of the sensor, thus resulting in inaccurate gas detection.
Others
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Pressing buttons unnecessarily may change the settings, preventing alarms from activating
correctly. Operate the gas detector using only the procedures described in this operating manual.
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Do not drop or give shock to the gas detector. The accuracy of the gas detector may be
deteriorated.
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Do not jab the buzzer opening with a sharp-pointed item. Doing so may cause a failure or
damage.
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Do not remove the panel sheet on the display. The water-proof and dust-proof performances
will be deteriorated.
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Do not affix a label or the like on the infrared port. Infrared communications can no longer be
conducted.
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The operating environment may include gases that have harmful effects on the sensor of the
gas detector. The gas detector cannot be used in the presence of the following gases:
(1) High-concentration sulfides that exist continuously (such as H2S, SO2, etc.)
(2) Halogen gases (such as chloride compounds, fluorocarbons, etc.)
(3) Silicone (Si compounds)
Do not use the gas detector in the presence of the above gases (such as high-concentration
sulfides, halogen gases, silicone, etc.), which may shorten the sensor life significantly or
cause malfunctions such as inaccurate readings.
In case the gas detector is used for detection in the presence of silicone, etc., be sure to
check the gas sensitivities before using it again.
About battery replacement
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Never fail to turn off the power of the gas detector before replacing the batteries.
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Replace the batteries in a safe place.
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Replace all of the four batteries with new ones at one time.
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The conditions for the explosion-proof standard of the gas detector include the use of
TOSHIBA batteries. To use the unit as an explosion-proof product, use four AA alkaline
batteries (LR6) manufactured by TOSHIBA Corporation.
•
Pay attention to the polarities of the batteries.
Usage
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In a low-temperature environment, the operating time is shortened due to the battery
performance property.
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At low temperatures, the responses of the LCD display may slow down.
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Note the following points for air calibration according to the operating environment.
(1) Before performing air calibration in the atmosphere, check that the surrounding air is
fresh.
(2) Before checking air purge, be sure to perform air calibration with the purge air of the gas
storage tank or pipeline to use. Measurement should be performed in the purge air
environment to obtain correct results.
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Perform air calibration after the reading is stabilized.
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If there is a sudden temperature change of 15ºC or more between the storage and
operational locations, turn on the power of the gas detector, let it stand for about 10 minutes
in a similar environment to the operational location, and perform air calibration in fresh air
before using it.
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When cleaning the gas detector, do not splash water over it or use organic solvents such as
alcohol and benzine on it. The surface of the gas detector may be discolored or damaged.
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If the gas detector is not used for a long time, turn on the power at least once every six
months and check that the pump draws in air (about three minutes). The gas detector, when
not activated for a long time, may cease to work because of hardening of the grease in the
pump motor.
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If the gas detector is not used for a long time, store it after removing the batteries. Battery leaks may
result in fire, injury, etc.
When the gas detector is used again after a long-period storage, never fail to perform air calibration.
For information on readjustment including air calibration, please contact RIKEN KEIKI.
