VF HF-50 - Annex F. Detector Status, Detector Supply, HV Sources; Tab. 20 Global Status of the Detector; Tab. 21 Status of the Detector´s Supply; Tab. 22 Status of HV Source

Annexes
VF1807090083 EN revision 83
Annex F. Detector status, detector supply, HV sources
Bit
Description
0
Automatic sending of the number of pulses. The bit activates the automatic sending of the number of
pulses to the address DetSendAdr. Results will always be sent at the end of each sampling period.
1
Automatic sending of count rate. The bit activates the automatic sending of the measured count rate to the
address DetSendAdr. Results will always be sent after calculating a new value at the end of each sampling
period, see figure.
2
HV source is switched off. The bit is set if the HV source is out of order.
3
Not used. Always zero.
4
Overload of channel A. The bit indicates overload of the detector in channel A in the current sampling
period. It is set if Count_A > MaxRate_A·SP or if PDT_A > MaxPDT_A. The overload is signalized by
displaying the sign "MAX" on the instrument display.
5
Overload of channel B. The bit indicates overload of the detector in channel A in the current sampling
period. It is set if Count_B> MaxRate_B·SP or if PDT_B> MaxPDT_B. The overload is signalized by
displaying the sign "MAX" on the instrument display.
6
Too high count rate in channel A. The bit indicates exceeding the maximum count rate on an average in
channel A. It is set if Rate_A > MaxRate_A. The overload is signalized by displaying the sign "MAX" on the
instrument display.
7
Too high count rate in channel B. The bit indicates exceeding the maximum count rate on an average in
channel A. It is set if Rate_B > MaxRate_B. The overload is signalized by displaying the sign "MAX" on the
instrument display.
Tab. 20 Global status of the detector
Bit
Description
0
Warning. The bit is set if Supp_Umeas < Supp_Umin1
1
Error. The bit is set if Supp_Umeas < Supp_Umin2
2
Warning. The bit is set if Supp_Umeas > Supp_Umax1
3
Error. The bit is set if Supp_Umeas > Supp_Umax2
4-15
Always zero.
Tab. 21 Status of the detector´s supply
Bit
Description
0
HV source is disabled. This bit is set when any overload is detected, i.e. if the output current is higher than
the permitted current (parameters HV_Imax and HV_Ichange). Setting this bit will disable the HV source.
Enabling the HV source and resetting this bit are only made after switching the instrument on and when
recording the parameter HV_Ureq into the instrument.
1
HV source voltage is being changed. When changing the required voltage (for example after switching from
0V to HV_Ureq), the HV source does not change its output voltage at once, but gradually at 200 V/s. This
bit indicates that the HV source is undergoing this changeover.
2
HV source voltage is lower than required. The bit is set if







100
min_
1__
UHV
UreqHVUmeasHV
.
3
HV source voltage is higher than required. The bit is set if







100
max_
1__
UHV
UreqHVUmeasHV
.
4-15
Always zero.
Tab. 22 Status of HV source