Agilent TwisTorr 305-ICQ Manual Del Usuario página 247

Technical Information
Figure 83 Speed setting via PWM signal
Programmable analog signal: this output signal is a voltage (from 0 to 10 Vdc)
proportional to a reference size (Frequency or Power or Temperature) set by the
user. The default factory setting is the rotational frequency (see the following
example diagram). The user can set the reference size by acting via serial
command.
When the reference size is Power, the relation is:
ANALOG OUTPUT Vout =10V --> Output power = 200W
When the reference size is Temperature, the relation is ANALOG OUTPUT
Vout =10V --> Pump Body Temperature = 125°C
Agilent TwisTorr 305-ICQ & 305-IC SF User Manual 247