HYDAC AS 1000 - Manual (Page 5)

User Manual AS 1000 09.04.2008
5
4.3 Ideal saturation level in hydraulic and lubrication systems
Since the effects of free (or emulsified) water are considerably more damaging than
dissolved water, the water content should always be significantly lower than the
saturation point. However, even dissolved water can cause damage,. All reasonable
measures should be taken therefore to keep the level of saturation as low as
possible. Hydraulic and lubrication fluids cannot be "too dry"!
As a guide, we recommend a saturation level of 45% for all systems.
5. Electrical connection
R
Lmax
= (U
B
-10V) / 20mA [k
Ω]
* HSI = HYDAC Sensor Interface (HYDAC internal communication interface)
(do not connect during normal operation!)
Signal saturation level
AS 1000-C
2
1
3
4
+U
b
Signal temp.
RL
RL
5
GND
HSI *
F
ree w
a
ter
D
iss
o
lve
d
w
a
te
r
Saturation level
100%
75 %
50 %
25 %
0 %
Saturation
point
(do not connect during normal operation!)
Progr. output 1
AS 1000-P
2
1
3
4
+U
b
Progr. output 2
5
GND
HSI *