TR250
12410-0701-03
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Function Diagram
Time of Response
– Measuring-time t M
The time of response depends on the number of connected sensors and the measuring function. At
continuously change temperatures, measuring-time t M is app. 2 s. At rapidly changing temperature, such as
appears when simulating temperatures with a potentiometer, measuring time t M is app. 4 … 6 s.
Relay locked switching
In this mode, relay will only switch back, when switching-back-temperature has been reached, switching back
delay time has passed and a reset has been made (button, contact Y1-Y2 or switching off and on of the TR
250). Readiness is displayed by flashing (1:1) of appropriate alarm-LED.
sensor
LED Alarm
Relay r
Reset
t
t
M
LED Alarm
(locked)
Relay (loc ked)
t
M
= meas uring time
= LIMIT
= LIMIT+Hys teresis
doF
t
M
dAL