Now, using a strontium source and putting it above of the silicon detector with a metal shape to hold it, I'll take new measures.

I turn on the Alibava, the Agilent (photomultiplier) and the Keithley (silicon detector).

Settings:

Agilent - +6V ---> 0.850V        Keithley - Cmpl ---> Fixed on 10μA                                                                              Alibava - 100000 Thrs for each voltage, with Thr in -30.

             +25v --> 12V                            Vrsc ----> I made 8 measures with different values:                                                    I saved the files on /tmp/ and I wrote the name like this:

                                                                            20V, 40V, 60V, 80V, 100V, 120V, 140V and 160V                                       Ex: /tmp/V80-μA0.55-LV0.850-HV12-Thr-30

                                                                                                                                                                                                           Where:     V= Keithley's voltage

                                                                                                                                                                                                                          μA= Relative amp to the Keithley's voltage

                                                                                                                                                                                                                          LV= Agilent's Low Voltage (+6V)

                                                                                                                                                                                                                          HV= Agilent's High Voltage (+25V)

                                                                                                                                                                                                                          Thr= Alibava's Thrigger

 On V160, I'd problems. I tried 3 times, and Alibava stop working at 40000/50000 Thrs. The same occured on V20.

 I put 30000 Thrs, instead of 100000, and it works.

Hans asked me to put insulating tape on some cabes of the Keithley and Agilent, and I did it.