User Manual EE360
Moisture in Oil Sensor | 35
9 Technical Data
Measurands
Water Activity (a
w
) / Water Content (x)
Measuring range
0...1 aw
0...100 000 ppm; actual range depends on the oil type, for non-mineral transformer oil,
specific solubility parameters are needed (ppm output is valid in the range 0...100 °C
(32...212 °F))
Accuracy
1)
-15...+40 °C (5...+104 °F)
(0...0.9 a
w
)
-15...+40 °C (5...+104 °F)
(0.9...1 a
w
)
-25...+70 °C (-13...+158 °F)
-40...+180 °C (-40...+356 °F)
±(0.013 + 0.3%*mv) a
w
mv = measured value
±0.023 a
w
±(0.014 + 1%*mv) a
w
±(0.015 + 1.5%*mv) a
w
Temperature dependency of electronics
, typ.
±0.0001 a
w
/°C (±5.6 * 10
-5
a
w
/°F)
Response time t
90
, typ.
@ 20 °C (68 °F) in still oil
10 min.
1) Including hysteresis, non-linearity and repeatability, traceable to intern. standards, administrated by NIST, PTB, BEV...
The accuracy statement includes the uncertainty of the factory calibration with an enhancement factor k=2 (2-times standard deviation).
The accuracy was calculated in accordance with EA-4/02 and with regard to GUM (Guide to the Expression of Uncertainty in Measurement).
Temperature (T)
Probe measuring range
-40...+180 °C (-40...+356 °F)
Accuracy
1)
-40 -20
0
20 40 60 80 100 120 140 160 180
0
0.1
0.2
0.3
0.4
0.5
0.6
∆
T [°C]
T [°C]
0.55
Temperature dependency of electronics
, typ.
±0.005 °C/°C
(±0.016 °F/°F)
1) Traceable to international standards, administrated by NIST, PTB, BEV,...
The accuracy statement includes the uncertainty of the factory calibration with an enhancement factor k=2 (2-times standard deviation).
The accuracy was calculated in accordance with EA-4/02 and with regard to GUM (Guide to the Expression of Uncertainty in Measurement).
Outputs
Analogue
Two analogue outputs freely selectable and
scalable
0 - 1 / 5 / 10 V
-1 mA < I
L
< 1 mA
I
L
= load current
4 - 20 mA
3-wire
R
L
< 500 Ohm
R
L
= load resistance
0 - 20 mA
3-wire
R
L
< 500 Ohm
Digital
Digital interface
RS485 (EE360 = 1 unit load)
Protocol
Option J3
Factory settings
Supported Baud rates
Measured data types
Modbus RTU
9 600 Baud, parity even, 1 stop bit, Modbus address 231
300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 76800
FLOAT32 and INT16
Protocol Option J4
Ethernet-PoE
Modbus TCP
