Maintenance; Daily Inspection - YOKOGAWA ZX8D User Manual

6.

Maintenance

WARNING
When noxious gases such as CO or other gases are contained in the calibration gas, be careful
when venting or handling the instrument to avoid poisoning.
CAUTION
• If the cause of any fault cannot be determined despite reference to the instruction
manual, be sure to contact local sales representative or service office. If the instrument is
disassembled carelessly, you may have a shock hazard or injury.
• To avoid electrical shock, be sure to turn OFF the source power supply before work.
• To prevent burning your hands, be sure to turn OFF the source power supply before
cleaning the piping outlet. After power off, wait until the piping outlet cools down.
• Do not use replacement parts other than those specified by the maker. Otherwise intended
performance may not be obtained, or accidents or faults may result.
• Replacement parts such as a maintenance part should be disposed of as incombustibles.
• Do not use a replacement part other than specified by the instrument maker. Otherwise,
adequate performance will not be provided. Besides, an accident or fault may be caused.
• Wiring at a place which is exposed to water or rain, is prohibited in order to prevent electrical
shock or damage to the instrument.
6.1

Daily inspection

Zero point (air) and span calibration
n
(1) Calibrate the zero point according to the instruction manual for the infrared gas analyzer.
(2) Calibrate the span following zero point calibration.
(3) Zero point and span should be calibrated about once a week as required.
Check of flow rate
n
Check once a day if sample gas flow rate is 0.5±0.25 L/min.
Check of analyzer output and temperature indication
n
Oxygen analyzer output
l
If the response is delayed or the oxygen indication does not change, then check for disconnected
piping or clogging of the outlet pipe, etc.
Temperature indication
l
• Check if the temperature indication is in a range of 800±5°C.
• If the temperature indicator shows "UUUU", then wiring may be disconnected or a
thermocouple may be broken.
IM 11G00E01-01EN 6th Edition : May. 21, 2018-00
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