User Guide

Operating Instructions αlpha-RES1000
26
Appendix 2 – Conductivity / Resistivity of Various Aqueous Solutions at 25
o
C
Conductivity Resistivity
Pure Water 0.05 uS/cm 18
MΩ-cm
Power Plant Boiler Water 0.05 - 1 uS/cm 1 - 18
MΩ-cm
Distilled Water 0.5 uS/cm 2
MΩ-cm
De-ionized Water 0.1 - 10 uS/cm 0.1 - 10
MΩ-cm
De-mineralised Water 1 - 80 uS/cm 0.01 - 1
MΩ-cm
Mountain Water 10 uS/cm 0.1
MΩ-cm
Drinking Water 0.5 - 1 mS/cm 1 - 2
MΩ-cm
Waste-water 0.9 - 9 mS/cm 0.1 - 1
MΩ-cm
Potable Water Maximum 1.5 mS/cm 0.7
MΩ-cm
Brackish Water 1 - 80 mS/cm 0.01 - 1
MΩ-cm
Industrial Process Water 7 - 140 mS/cm rarely stated
Ocean Water 53 mS/cm rarely stated
Appendix 3 - Simple Explanation on the Function of Hysteresis
The controller relay activates when the set-point is reached. In the reverse direction, it does not de-
activate when the value reaches the set-point. Instead, it continues to be active till the value reaches the
amount set by the Hysteresis band.
SP1 Set to LO
1.
00
1.2
0
1
8
.
80
1
9
.
00
REL
A
YOFF
HYSTERESIS B
A
ND
FORWARD DIRECTION
RE
V
ERSE DIRECTION
SP1
SP2
REL
A
YON
SP2 Set to HI
m
Ω