Maintenance; Cleaning; Sensor Poisons - Macurco RD-VRF Instrucciones De Usuario

Do not disassemble the unit or attempt to repair or modify any component of this
instrument. This instrument contains no user serviceable parts, and substitution of
components may impair product performance.

5 Maintenance

5.1 Cleaning

Cleaning of the external surfaces is best carried out using a damp cloth with a mild detergent or soap. Use a vacuum
cleaner with a soft brush to remove dust or contamination under the cover. Do not blow out the sensor with
compressed air.
CAUTION
Avoid the use of harsh cleaning materials, abrasives, and other organic solvents. Such materials may permanently
scratch the surfaces and damage the display window, labels, sensor, or instrument housing. High voltage terminals
(100-240VAC) are located within this detector, presenting a hazard to service technicians. Only qualified technicians
should open the detector case and service the internal circuits. Ensure power is removed from the detector prior to
cleaning the unit.

5.2 Sensor Poisons

The gas sensor in the detector is designed with extreme sensitivity to the environment. Alcohol, ammonia, cleaning
solvents, paint thinner, gasoline vapors, and aerosol propellants may cause nuisance alarms.
In addition, the sensing function may be deteriorated if it is exposed to a direct spray from aerosols such as paints,
silicone vapors, etc., or to a high density of corrosive gases (such as hydrogen sulfide or sulfur dioxide) for an
extended period.
•
Avoid contamination by alkaline metals. Sensor characteristics may be significantly changed if the sensor is
contaminated by alkaline metals, especially salt-water spray.
•
Sensor performance may be affected if exposed to a high density of reactive gases for an extended period,
regardless of the powering condition.
•
If water freezes on the sensing element surface, the sensing material may crack, which will irreversibly affect
sensor characteristics.
•
If water condenses on the sensor element surface and remains for an extended period, sensor
characteristics may temporarily drift. Light condensation under normal conditions of indoor usage would not
pose a significant problem for sensor performance.
•
Regardless of its powering condition, if the sensor is exposed in extreme conditions such as very high
humidity, high temperatures, or high contamination levels of organic vapors or other gases for an extended
period, sensor performance may be impaired.
•
Sensors cannot properly operate in a zero or low oxygen content atmosphere. They require the presence of
normal ambient oxygen in their operating environment to function properly.
•
Sensor characteristics may be changed due to soaking or splashing the sensor with water.
•
Avoid mechanical shock. Breakage of lead wires may occur if the sensor is subjected to a strong shock.
REV – 1.0
WARNING
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