RKI Instruments SD-705EC - Manual (Page 20)

PT2E-1140
Contents of inspection
Inspection
point/item
Inspection by every 6
months
Yearly inspection
Judgment
Sensor
sensitivity
Calibration with gas
Sensor replacement
and calibration with
gas
Adjust zero and span according to Gas
Sensitivity Calibration Method
6 months inspection and yearly inspection include daily and monthly inspection respectively.
Following items are performed in periodical inspection.
①Daily check ②Cleaning of device ③Calibration
④Function check ⑤Parts replacement ⑥etc.
☆To keep the safety performance of the instrument, recommend to make maintenance
contract concerning to regular inspection, adjustments, repairing, etc. including gas
calibration.
！
・This is a safety instrument and the inspection every 6 months or more is
mandatory to ensure the safety. If the unit is used by continuously without
inspection, the sensor sensitivity may change, resulting in failure of correct
detection.
・Before zero adjustment, confirm with a portable gas detector that there is no
gas in the neighborhood. If zero adjustment is made in an atmosphere
containing gas, no correct calibration is expected. If gas leakage actually
occurs, the unit shows the low concentration value, possibly leading to a
hazardous state.
WARNING
Be sure to inform sections concerned beforehand when performing
adjustment of the gas sensitivity
REMARKS ＊
４−２ Maintenance Mode
Adjustment is performed by control key in maintenance mode without opening the lid.
Following is a menu of maintenance mode and common operation method.
In maintenance mode, 4-20mA output becomes 2.5mA and SKIP light is flickering.
All operation performed by control key.
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