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Technical Information
Protect
The protect function is useful to avoid damages in the Ion pump due to the
overcurrent.
If this function is enabled, the controller waits 60 seconds from the HV ON, then it
begins to check the current provided. If the current exceeds the threshold in the
following table, the HV channel turns off and the controller gives the "Protect Error".
This kind of error is not a controller error but it is only a warning, informing that the
HV channel is turned off because the protect current threshold was exceeded.
To enable/disable the protect function: while pressing the key HV-x, where x
corresponds to the HV channel, press the key PROTECT.
When the function is enabled, a square is visible on the display, corresponding to
the relative HV channel.
Table 4
Pump type
1000 Diode
500 Diode
300 Diode
200 Diode
150 Diode
75-55-10 Diode
20 Diode
10 Diode
2 Diode
0.2 Diode
75-55-45 SEM
35-25 SEM
10 SEM
1000 StarCell
800 StarCell
500 StarCell
300 StarCell
200 StarCell
150 StarCell
75-55-40 StarCell
20 StarCell
182
Protect current
100
100
50
50
30
10
5
5
0.2
0.1
10
5
5
100
100
100
50
50
30
10
5
Agilent 4UHV Ion Pump Controller User Manual
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