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７．MEASURES AT ABNORMAL CASE
７−１．Responding to trouble alarm
If this detector founds defective, contact RIKEN KEIKI.
７−２．Before it is thought to be a trouble
・Check the wirings around the related instruments as well as this detector head.
It may be caused by improper operation.
・Re-check the detection system and contact RIKEN KEIKI.
８．DEFINITION OF TERMS
Galvanic cell
Galvanic cell type oxygen sensor that produces a current proportional to the oxygen content
permeated through the membrane. Refer to 「10. DETECTION PRINCIPLE」 for details.
Zener barrier
Safety retainer for explosion protection by limiting the energy of electric current within a
non-ignition level.
CVVS
This is a kind of connecting cable between indicator/alarm unit and oxygen detector head.
CVVS means a “Polyethylene insulated and vinyl sheathed control cable with shield”.
Calibration
By using standard (calibration) gas, adjust gas reading in indicator/alarm unit to match the
calibration gas concentration.
It may be caused by cable disconnection, short circuit, etc.
