23
Magtrol TM Series In-Line Torque Transducers
Chapter 2 – Installation / Configuration
2.3.2
T
orque
S
Ignal
c
ondITIonIng
e
lecTronIc
c
IrcuIT
The TM Series Torque Transducer is fitted with a measuring signal conditioning electronic circuit.
This conditioning chain is based on a carrier frequency system containing a synchronous demodulator
and a second-order butterworth-type low-pass filter. The filter's cut-off frequency is adjusted by
micro-switches (SW1 to SW12) that are accessible by removing the cover of the transducer's built-
in electronics (see
Figure 2–6
). The various setting possibilities are indicated on a label affixed to
the back of this cover.
Some applications may warrant fine adjustment of the torque transducer zero point. To activate the
offset adjustment potentiometer, simply positioning the SW12 micro-switch to oN. A full-scale zero
adjustment of ±10% equivalent to ±0.5 V can then be carried out by the potentiometer. With the SW12
micro-switch to oFF, the default settings are used.
Note:
There are no functions allocated to the SW11 micro-switch.
Label affixed to cover of
transducer's built-in electronics
SW1 - SW12
Micro-switches
ON
1 2 3 4 5 6 7 8 9 10
12
11
ON
1 2 3 4 5 6 7 8 9 10
12
11
1
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
2
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
5
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
10
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
20
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
40
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
100
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
200
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
500
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
1000
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
2500
Hz
ON
1 2 3 4 5 6 7 8 9 10
12
11
5000
Hz
SW11 : N/C
SW12 : ENABLE POT.
SW1 - SW10 : FILTER
Offset Adjustment
Potentiometer
Figure 2–6 SW1 – SW12 Micro-switches and Offset Adjustment Potentiometer
