Omega Vehicle Security TCIC - Manual (Page 20)

TCIC User’s Manual
18
Set Points Switch
On: ...
Defines the limit that upon its crossing output x will go
high (on) signaling a ‘setpoint indication’.
Off:
...
1. Defines the direction of temperature change that will
trigger the indication:
Off < On means indication upon crossing the On limit
upwards.
Off > On means indication upon crossing the On limit
downwards.
2. When Output Mode = ‘SP-Auto’, the Off limit plays one
more role:
It defines the hysteresis, i.e., the limit where the output
will go low (off) again.
To make the above description more comprehensible,
some examples follow:
Example 1:
Output Mode = ‘SP-Auto’, ‘On’ = 100°, ‘Off’ = 90°.
The output will go high (on) when the temperature rises
from 99° to 100°, and back low (off) upon falling from
91° to 90°.
Example 2:
Output Mode = ‘SP-Auto’, ‘On’ = 100°, ‘Off’ = 110°.
The output will go high (on) when the temperature falls
from 101° to 100°, and back low (off) upon rising from
109° to 110°.
Example 3:
Output Mode = ‘SP-Latch’, ‘On’ = 100°, ‘Off’ = 90°.
The output will go high (on) when the temperature rises
from 99° to 100°, and stay high (regardless of any
temperature change) until manually turned off. Note that
– as Output Mode = ‘SP-Latch’ – the only meaning of
‘Off’ = 90° is to set the direction, as 90° < 100°.
Specifying ‘Off’ = 80° will give the same effect!