7-2 Operation Chart When Alarm Hold Setting is Activated
Changing operational setting switches activates the alarm hold setting for indication and control output contacts.
For the Operation Chart, refer to Drawing 14.
It is possible to set the control output contact from the host system by the Modbus communication.
ＯＦＦ
ＯＮ
Lighting
out
Lighting
up
ＯＦＦ
Lighting
out
ＯＦＦ
ＯＦＦ
ＯＮ
ＯＦＦ
Flashing
ＯＮ
ＯＦＦ
ＯＮ
ＯＮ
ＯＦＦ
ＯＦＦ
Open
Open
Closed
Open
Closed
Open
Lighting up
ＯＦＦ
ＯＮ
ＯＮ
ＯＦＦ
ＯＦＦ
Alarm cancel switch
ＯＦＦ
ＯＮ
ＯＮ
ＯＦＦ
ＯＦＦ
No
indication
No
indication
*1 Indication
Indicating ---
*1 Indication
*2 Indication
*1 The sensor length and the water leakage location are indicated alternately. (Refer to Attached Drawing 4)
*2 For the break indication, the alarm status is not held.
4
ｍＡ
4
ｍＡ
4
ｍＡ
20
ｍＡ
ＯＦＦ
Lighting
out
No
indication
Lighting
out
Power
Power Indicator LED
Water leakage
detection function
Alarm Indicator LED
Break detection function
Buzzer Stop Switch
Buzzer sounding
Control output contact
(water leakage: COM-NO)
Control output contact
(break: COM-NO)
Sensor length indication
Water leakage
location indication
Water leakage location
data output
(4-20 mA output)
6 + 0.03 x water leakage location indication (m) mA
4 + 16 x water leakage location indication (m) / 250 (m) mA
or
Drawing 14 Operation Chart-2
Regarding the operation when the alarm hold setting is activated
When the alarm hold setting is activated, the alarm status is held until the cancel switch is pressed.
Electric power failure or power-off returns the contact operation status to that when the power source is shut off.
Regarding the Alarm Indicator LED
The Alarm Indicator LED does not maintain alarm status. The Alarm Indicator LED goes out when the system
detects recovery from water leakage status and break status.
If the Alarm Indicator LED continues to flash even after the water leakage sensor is wiped with rags etc., this
indicates that water leakage may occur at multiple locations.
After completely drying the water leakage sensor at the location that the indicator displays, press the alarm
cancel switch.
* If drying is insufficient, deviation may occur between the location displayed by the indicator after the alarm
cancel switch is pressed and the actual water leakage location.
-8-
