Agilent Technologies TwisTorr Medium-TMP Mode D'emploi page 150

17 Technical Information
Interconnections
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.
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).
Figure 7
150/181 TwisTorr Medium-TMP onboard Controller User Manual / 87-901-050-01 (B)
•
frequency: 100 Hz +/-20%
•
amplitude: 24 V max
•
duty cycle range: from 25% to 75% corresponding to an
output frequency from 680 Hz to FMAX Hz. Hz linearly. With
duty cycle <25 % rotational frequency = 680 Hz, with duty
cycle >75 % rotational frequency = 825 Hz for X3512-64016 or
714 Hz for X3512-64006