PAJ
Sensor A/S • Grundtvigs Allé 163 • DK-6400 Sønderborg
Tel: +45 74 43 71 81 • Fax: +45 74 43 71 91 • CVR: 3459-1229 • www.paj.dk • e-mail: [email protected]
APPROVALS: ISO 9001, ISO 14001, ISO 13485, IEC 61340-51 & IPC-A-610 CLASS 3
03-01-0501-CRJ-04 Side 7 af 53
Normal operation
Water activity (a
w
) provides the relative availability of water in oil where
pure oil has an activity of zero and oil saturated with distilled water has an
activity of exactly one. Under normal operation the WIO200 continuously
supplies an output analogue signal of 4 to 20 mA corresponding to 0.01 to
1.00 a
w
. Alarm indications with 0.03 a
w
hysteresis via 2 relays are
provided for each sensor. These data can also be read out from the sensor
on the RS485 Modbus communication line.
Default alarm values are 0,5 a
w
and 0,9 a
w
. Assumes these alarm values:
High alarm on at 0,50 a
w
(12 mA).
High alarm off at 0,47 a
w
(11,5 mA)
High high alarm on at 0,90 a
w
(18,4 mA).
High high alarm off at 0,87 a
w
(17,9 mA).
High high alarm will disable high alarm, thus only one alarm can be active.
