DF-8500 C Point type combustible gas detector with measuring range of 0~100%LEL
1.3 Safety and Precautionary Measures to be Adopted
Attention !
The following safety instructions must be observed implicitly. Only in
this way can the safety and health of the individual operators, and the
correct functioning of the instrument, be guaranteed.
- The device described in this manual must be installed, operated, and maintained in
strict accordance with their labels, cautions, instructions, and within the limitations
stated.
- The device is designed to detect combustible gases in air.
- Protect the device from extreme vibration. Do not mount the sensor in direct sunlight
as this may cause overheating of the sensor.
- The device must be installed with the sensor inlet pointing downwards to avoid
clogging of the gas inlet by particles or liquids.
- The only absolute method to ensure proper overall operation of the device is to
check it with a known concentration of the gas for which it has been calibrated.
Consequently, calibration checks must be included as part of the routine inspection of
the system.
- As with all devices of these types, high levels of, or long exposure to, certain
compounds in the tested atmosphere could contaminate the sensor. In atmospheres
where the device may be exposed to such materials, calibration must be performed
frequently to ensure that the operation is dependable and display indications are
accurate.
- The device must not be painted. If painting is done in an area where a device is
located, care must be exercised to ensure that paint is not deposited on the sintered
metal flashback arrestor in the gas sensor inlet, if so equipped. Such paint deposits
would interfere with the gas diffusion process.
- Use only genuine MSA replacement parts when performing any maintenance
procedures provided in this manual. Failure to do so may seriously impair instrument
performance. Repair or alteration of the device, beyond the scope of these
maintenance instructions or by anyone other than an authorised MSA service
personnel, could cause the product to fail to perform as designed.
- The device is designed for applications in hazardous areas under atmospheric
conditions.
- For correct measurements, the combustible gas sensors require an oxygen
concentration greater than 10 %V/V. Oxygen enriched atmospheres, greater than 21
%V/V, can affect the measurement and the electrical safety of the device.
- The response time of the device will be increased by the significant dust deposits on
the sensor. Inspections for dust deposits must be done at regular intervals.
- Catalytic combustible gas sensors may produce low or zero response to
combustible gas after exposure to substances such as Silicon, Silane,
Silicate, Halide and compounds containing Fluorine, Chlorine, Iodine or
Bromine.
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Summary of Contents for DF-8500 C
Page 3: ...DF 8500C 0 100 LEL 1 1 1 DF 8500 C SUPREMA Gasgard XL 9010 9020 8020 1 2 4...
Page 4: ...DF 8500C 0 100 LEL 1 3 10 V V 21 V V 5...
Page 5: ...DF 8500C 0 100 LEL 1 4 1 2 12 2 2 1 1 DF 8500 C 6...
Page 7: ...DF 8500C 0 100 LEL 3 3 1 3 1 1 mm 3 DF 8500 C 8...
Page 12: ...DF 8500C 0 100 LEL 4 4 1 4 0mA LED LED COMB 100 100 LEL 25 50 25 LEL 50 LEL 13...
Page 20: ...DF 8500C 0 100 LEL 4 3 1 1 4 2 2 M 01 4 2 2 M 02 OFF 4 4 4 0000 1 2 ON 3 4 21...
