Agilent Technologies TwisTorr 305 FS User Manual page 75

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 305 FS onboard Controller User Manual / 87-901-060-01
frequency: 100 Hz +/-20%
amplitude: from 5 to 24 V
duty cycle range: from 25% to 75% (t
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 rotational
off
8
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