Thermo Fisher Scientific Alpha COND 560 - Manual (Page 29)

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NOTE: 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’.
4
Setting hysteresis value: The lower display shows ‘HYS’. The upper
display shows the last configured value, otherwise the default value 20
µS. Press
▲ or ▼ key to enter the hysteresis value for set point 1.
Allowable range: 0 to 10% of full-scale of the selected measuring range.
Press ENT key to confirm your hysteresis value.
NOTE: Hysteresis prevents rapid relay contact switching if the
conductivity reading is fluctuating near the set point. Refer
‘Appendix 2
Graphical Representation of the Function of Hysteresis’.
5 5
Setting on-delay time: The lower display shows ‘On.d’. The upper
display shows last configured on-delay value. Press
▲ or ▼ 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.
Press ENT key to confirm your on-delay time.
6
Setting off-delay time: The lower display shows ‘OF.d’. The upper
display shows last configured off-delay value. Press
▲ or ▼ 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.
Press ENT key to confirm your off-delay time. The controller reverts to
SP1 screen.
Press
▲ or ▼ key to access other setup screens or press ▲ and ▼ key
simultaneously (escape) to return to measurement mode.