Bühler technologies Thermotronik TT-77, Installation And Operation Instructions Manual, Page: 19 / 41

Thermotronik TT-77
Frequency output
Frequency output
If the output is defined as a frequency output, a
square wave signal with a frequency between 1 Hz
and 100 Hz proportional to the measurement will be
output.
Note: To increase the slew rate of the square wave
signal, we recommend loading the switching output
with an load of 10 kΩ.
T ≤
corresponds
to f = 1 Hz
Time t
Time t
Time t
T = 47.5 °C
corresponds
to f = 50 Hz
T ≥
corresponds
to f = 100 Hz
F ILo F IHi
Example: = 15 °C,
= 80 °C
with temperature T and frequency f:
F ILo
F IHi
open
(0)
closed
(1)
open
(0)
closed
(1)
rising NO contact
falling NC contact
NO (normally open)
rising NC contact
falling NO contact
NC (normally closed)
Hno Hnc
Note: The designation of the switching function may vary:
Measured variable
5.7.2 Switching output x: Upper switching limit (switching point)
The upper switching limit for switching output Out x can be defined with the following submenu:
Measured variable
____
out_
Measured variable main menu
Out X ____
SPI FHI F I.Hi
Switching point X
____
Selection menu
[ o.Lo - o.Hi ]
Settings menu OUTX
Setting range:
0 °C to 100 °C
(32 °F to 212 °F)
Switching point for OUT x
Note:
– The switching point must be set to within the range limits (see menu Basic Settings Advanced
Functions ).
– If switching output OUT x was assigned the function Window , will appear. The
setting corresponds with the upper window limit.
– If switching output OUT x was assigned the function Frequency output , will ap-
pear. The setting corresponds to the frequency 100 Hz.
17 Bühler Technologies GmbH BE140013 ◦ 07/2019