Comparators With Simple Threshold Or Hysteresis - SAES SIP POWER User Manual

The relationship between the values of current and pressure depends on the type and size of used
pump and on the instantaneous pump voltage. To set the parameters of this relationship see
SETTINGS chapter at Sec. 6.
The value <1e-11 Torr shows up when IP current reaches 0 nA (IP current is below the
measurable limit).
Warning
In the case the HV cable is disconnected, the current will be 0nA and the value <1e-11 Torr will
show up as well.
4.3.

Comparators with simple threshold or hysteresis

Single Threshold SWITCH 1 comparator.
The device is equipped with an automatic overcurrent protection which switches off the IP supply
after the pump current exceeds the safety value protection adjusted under SW1.
This condition is indicated by an alarm message on the display
After 3÷5 seconds the supply automatically switches on again. If the overcurrent protection level is
exceeded once again, the device switches off repeatedly. After 3 unsuccessful attempts to switch
the supply on automatically, the supply switches off permanently.
After the cause of excessive current is removed (e.g. getting a better vacuum or removing a short
circuit) it is possible to switch on the unit again. To switch on the IP supply unit, it is necessary to
remove the alarm condition (keep right button pressed for 5 seconds) and only after that, press
the START/STOP button.
These functions protect the supply against an excessive load but also protect your pump against
an uncontrolled operation, which could damage it or shorten its lifetime.
On the IN/OUT INTERFACE connector a proper signal that reports current status of the SWITCH
is reported. The same status is shown on the display with the symbol of open/close electric switch
(more details in the display paragraph).
The pin layout of the output connector is described in the Sec. 8.1.
Single Threshold or Hysteresis SWITCHES 2 and 3 comparators
The supply is equipped with other two comparators-switches of the pump current/pressure. These
other two switches, SW2 and SW3, can be used to directly connect the SIP POWER with other
electronic equipment. Their outputs are led to the IN/OUT INTERFACE output connector. As for
SW1, also for SW2 and SW3 the status is shown on the display first line with the symbol of
open/close electric switch (more details in the display paragraph).
Comparator-switch SW1 can works only in Simple working mode.
Comparators-switches SW2 and SW3 can work in Simple working mode or in Window working
mode.
To change working mode see SETTINGS chapter (Sec. 6).
USER MANUAL - SIP POWER ION PUMP CONTROLLER
M.HIST.0109.23 Rev.1 Page 16 of 62