Agilent Technologies TwisTorr 74FS AG Rack Mode D'emploi page 220

17 Technical Information
Controller Connection
A load should be present to measure the voltage on open collector output; if not
NOTE 1
present connect 10 kohm resistor between the related pins.
The R1 and R2 output behaviours can be configured thorugh the serial
NOTE 2
communication as described in the serial communication window meaning
table. The related windows are:
Tab. 5
Set Point type (0÷4)
Set Point threshold value (expressed in Hz, W or s)
Set Point delay: time between the pump start and the set point check
(seconds)
Set Point signal activation type: the signal can be "high level active" or
"low level active"
Set point hysteresis (in % of value)
Set Point Pressure
Threshold Valid if min. 101 = 4
Format X.X EsXX
Where X = 0 to 9 s = + or -
220/300 TwisTorr 74 FS AG Rack Controller User Manual / 87-901-055-01
R1 R2
Win 101 Win 171
Win 102 Win 172
Win 103 Win 173
Win 104 Win 174
Win 105 Win 175
Win 162 Win 176