Agilent Technologies TwisTorr 304 FS series Bedienungshandbuch Seite 151

Speed setting: PWM input signal to set the pump speed. The PWM
signal characteristics must be the following:



The duty cycle percentage is referred to the low level portion of the PWM
NOTE
signal.
Figure 7
Programmable analog signal: this output signal is a voltage (from 0
to 10 Vdc) proportional to a reference quantity (frequency or power)
set by the user. The default setting is the frequency (see the following
example diagram).
TwisTorr 304 FS on board Controller User Manual / 87-901-028-01 (C)
frequency: 100 Hz +/-20%
amplitude: from 5 to 24 V
duty cycle range: from 25% to 75% (t
rotational frequency from 800 Hz to 1010 Hz linearly. With duty
cycle <25% rotational frequency = 800 Hz, duty cycle >75%
rotational frequency = 1010 Hz
Technical Information
Interconnections
/T) corresponding to a
off
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