Hamilton Electronics EPHUM011 - Manual (Page 14)

pH ARC Sensors Modbus RTU Programmer ’ s Manual (EPHUM011)
624300/01 page 14 / 67
pH ARC sensor: 4-20mA interface - linear
-15
-10
-5
0
5
10
15
20
25
30
35
0 4 8 12 16 20 24
Current [mA]
te
m
p
er
at
u
re
[°
C
]
1
2
3
4
5
6
7
8
9
10
11
p
H
Temp [°C]
pH
Figure 2.4.5.6.3: Example of linear 4-20 mA output characteristics for pH or temperature.
Current pH Temperature
4 mA 2 -10 °C
20 mA 9 +30 °C
pH ARC sensor: 4-20mA interface - bilinear
-15
-10
-5
0
5
10
15
20
25
30
35
0 4 8 12 16 20 24
Current [mA]
te
m
p
e
ra
tu
re
[°
C
]
1
2
3
4
5
6
7
8
9
10
11
p
H
Temp [°C]
pH
Figure 2.4.5.6.4: Example of bilinear 4-20 mA output characteristics for pH or temperature.
Current pH Temperature
4 mA 2 -10 °C
12 mA 9 +20 °C
20 mA 10 +30 °C