M1000/3000 Nova
Register 3
SPB7-230.033.11
Page 2 of 10
Siemens AG
Installation and Start-Up
Rev. 06
05.06
CS PS SP
Medical Solutions
10
-
2
Checks
with
high
voltage
3. Connect oscilloscope to P.C. board D705 as follows:
•
Channel 1 to measuring point "KVIST
(actual value)
" (1 V= 5 kV).
•
Channel 2 to measuring point "MAIST
(actual value)
" (1 V= 40 mA).
•
Trigger at measuring point "KVE" (start with high voltage "ON"), rising edge.
•
Twist the measuring leads and connect their grounding braids to measuring
point "0 VA".
4. Connect service PC to circuit board D702 using the connection cable.
5. Start the Service Program, see Chapter 22 "Appendix".
6. Check the anode menu for correct selection (tungsten anode enabled or disabled,
depending on which type of X-ray tube the customer has chosen). See Service
Program Instructions SPB7-230.114.03. ... .
kV-adjustment
10
Check the kV as follows:
1. Mains voltage and system OFF.
2. Connect DVM between the lower ends of R72 and R73 (on the left side of the high
tension plug) on D710 circuit board.
3. Mains voltage and system ON.
4. Set 27 kV and maximum mAs on the control panel.
5. Make an exposure and check that the DVM shows
+
2.700 V
+
0.010 V. Note the
values in the kV-adjustment protocol on page 22 - 6.
It is possible to select tungsten anode, even if the customer does
not have this option. However, the 50 µm Rh filter will then be
missing.
After shut-down of the system, there may still be 380 V DC present
on the intermediate circuit.
Life-threatening electric shock hazard exists.
The voltage level will be indicated by LED V24 on PC board D710.
The voltage will drop to less than 30 V within about 3 minutes, the
LED goes out at about 30 V.
NOTE
WARNING