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Siemens Building Technologies
HVAC Products
·
With a change of 0.4 %, the change in voltage over the entire angular rotation must
be 40 mV ±10 mV
U [V]
78721d06/0501
Fig. 38
Required microlinearity of the feedback potentiometer
·
The potentiometer wiper must be able to carry a current of £ 0.1 mA. The electrical
contact must also be suited for very small currents
£
I
0,1 mA
Fig. 39
Required contact rating of the potentiometer wiper
·
The potentiometer should be capable of exceeding 1 million cycles
Since the above requirements cannot be met with wire potentiometers, this products
uses special conductive plastic potentiometers of high quality.
If potentiometers of other manufacture are used, it is recommended to always install
conductive plastic potentiometers.
Electronic Air / Fuel Ratio Control System
17 Engineering notes
D
= 0,4 %
)
U10
B..
M
RVW25
78721d07/0501
[%]
CC1P7873.1en
57/69
15.10.2002
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