RKI Instruments SD-705EC - Manual (Page 18)

PT2E-1140
３−４ Gas Alarm Function
When gas concentration exceeds preset alarm level (alarm point), alarm relay contact and
alarm light activates. Gas alarm has 1 st alarm and 2 nd alarm. And each alarm performs
individually.
When gas concentration exceeds 1 st alarm point, 1 st alarm relay contact activates and AL1
light is lighting. When gas concentration decrease below 1 st alarm point, 1 st alarm relay
contact is reset, and AL1 light is off (Self reset)
Performance of 2 nd alarm is same as 1 st alarm.
The action at gas alarm shall follow to the client rule and immediate refuge shall be required.
Generally, the following action is taken.
① Ｃｏｎｆｉｒｍａｔｉｏｎ of reading at this detector.
② Based on gas alarm control concentration , it keeps the safety by keeping away
people from the monitoring area.
③ When gas concentration display show, close the gas value and confirm that gas
concentration gets lower enough.
④ Ｓｕｐpｏｓe that the leak gas is to remain and provide yourself with protection attire
and tool away from danger, go to the leak site and check the gas residual condition
by portable leak detector.
⑤ After checking that there is no danger, the treatment for gas leak shall be taken.
・Instantaneous gas leak may get lower at confirmation time.
・Except gas alarm, it gets alarm condition temporarily by
noise or any other accidental conditions.
REMARK ＊
３−５ Trouble Alarm Function
When the abnormality is detected in the instrument, trouble alarm light activates.
When the abnormality is detected in the instrument, PW/TR light is flickering. All except for
memory trouble (E-00) is self-restoration. When recovered from trouble condition into normal
condition, make restart(initial clear) with power on again.
For each trouble alarm, refer to 5-1, Trouble Indication and Countermeasure.
３−６ Confirmation of Alarm Level
(1) Press AL/SET switch ● by control key. When the switch is being pressed, 1 st alarm point
and 2 nd alarm point are indicated by turns in every 1 second on LCD. When 1 st alarm is
indicated. AL1 lamp is lighting. And 2 nd alarm as well.
(2) When release the control key, indication goes back to gas concentration.
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