Riken Keiki OX-591, Руководство по эксплуатации

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６．KIND OF ALARM AND PERFORMANCE
６－１．Kind of alarm
There are two kinds of alarm such as gas alarm and trouble alarm.
・Gas alarm ： When detection gas reaches preset alarm level or exceeds it, this starts an alarm.
《Latched mode → Self reset after reset operation.》
・Trouble alarm ：Abnormal condition in this unit is detected and give a trouble alarm.
Except system trouble “E-00”, it is non-latched mode.
When return to normal from trouble condition, it starts again from the action of
initial clear after power on see section【9. MEASURES AT AN ABNORMAL CASE】.
６－２．Gas alarm
６－２－１．Gas alarm action
(1) Display
①Gas concentration
When exceeds detection range (Over range), LED shows“∩∩∩∩”.
②Power light（PW：Green）
It keeps steady light.
③Alarm light（AL1：Amber）、（AL2：Red）
There are two alarm levels. When reading reaches each preset alarm level, or exceeds each
preset alarm level, this starts flashing and then returns to continuous lighting after reset
operation, (Standard).
(2) External output
①４～２０mA output
Electric current proportional to gas concentration is output. In case of over range, the maximum
output is 22mA.
②Alarm contact
When gas concentration reaches preset alarm level or it exceeds preset alarm level, relay
contact is activated.
Alarm relay contact is a latched mode. It returns self-reset mode when gas concentration
increases above preset level (in case of oxygen deficiency prevention version) after reset
operation.