Instruction Manual
D
lpha-CON 560
24
This parameter lets you choose the relay function. Select ‘LO’ to
activate the relay when the conductivity reading undershoots the
set point (SP1) or select ‘HI’ to activate the relay when the
conductivity reading overshoots the set point (SP1). SP1 and
SP2 can be selected as ‘LO/LO’, ‘LO/HI’, ‘HI/LO’, or ‘HI/HI’.
NOTE:
Setting hysteresis value:
The lower display shows ‘
HYS
’. The upper
display shows the last configured value, otherwise the default value 20
μ
S.
Press
Ÿ
or
ź
key
to enter the hysteresis value for set point 1.
Allowable range: 0 to 10% of full-scale of the selected measuring range.
4
Press ENT key
to confirm your hysteresis value.
Hysteresis prevents rapid relay contact switching if the
conductivity reading is fluctuating near the set point. Refer
‘
NOTE:
Appendix 2
Graphical Representation of the Function of Hysteresis’.
Setting on-delay time:
The lower display shows ‘
On.d
’. The upper
display shows last configured on-delay value.
Press
Ÿ
or
ź
key
to enter
the on-delay time for set point 1. Allowable range: 0 to 2000 seconds.
When the conductivity reading is reached the set point 1, the controller
delays the relay activation (switch on) by the on-delay time you set here.
5
5
Press ENT key
to confirm your on-delay time.
Setting off-delay time:
The lower display shows ‘
OF.d
’. The upper
display shows last configured off-delay value.
Press
Ÿ
or
ź
key
to enter
the off-delay time for set point 1. Allowable range: 0 to 2000 seconds.
When the conductivity reading is reached the set point 1 plus hysteresis
value, the controller delays the relay deactivation (switch off) by the off-
delay time you set here.
6
Press ENT key
to confirm your off-delay time. The controller reverts to
SP1
screen.
Press
Ÿ
or
ź
key
to access other setup screens or
press
Ÿ
and
ź
key
simultaneously
(escape) to return to measurement mode.
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