Window asks for Focus number. Type in
focus number FU-mA (1...6):
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filament converter PCB |
focus number |
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focus number FU-mA |
FU-mA EZ119 |
CU EZ139 (0...8 = max 9) |
1 |
large focus tube 1 |
filament circuit 2 |
focus number 2 |
2 |
small focus tube 1 |
filament circuit 1 |
focus number 0 |
3 |
large focus tube 2 |
filament circuit 2 |
focus number 5 |
4 |
small focus tube 2 |
filament circuit 1 |
focus number 3 |
5 |
large focus tube 3 |
filament circuit 2 |
focus number 8 |
6 |
small focus tube 3 |
filament circuit 1 |
focus number 6 |
After <Apply> a data screen comes up.
focus: |
see table ‘focus number FU-mA’ above |
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deinstall: |
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Umin [kV]: |
minimum kV value, |
default 40kV for radiographic tubes, |
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Umax [kV]: |
maximum kV value, |
default 150kV for radiographic tubes, |
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Uiso [kV]: |
focus specific value, default value will be overridden
after adaptation (generator version = max available emission current dependent)
Uiso is the kV value, from which on the filament current can be decreased to
drive always the max kV dependent emission current (with rising kV) |
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Pmax [W]: |
maximum focus output power, |
default value in tube data file |
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IFmax [mA]: |
max filament current limit, |
default value in tube data file |
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IFregelmax [mA]: |
= |
IFmax + analog
offset value for regulation purposes during boost up, |
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Philips tube : |
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physical filament circuit, see
table ‘filament converter PCB FU-mA
EZ119’ |
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FILsel : |
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FILcir: |
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I0 [uA]: |
I0 = |
max emission current at Umin (typically 40kV = default) |
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up to |
I110 = |
e.g. max emission current at Umax (typically 150kV = default) |
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I120 [uA]: |
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(I0 equals 40kV) + (I110 equals 110kV) = 150 kV |
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CU physical fil: |
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CU can handle 9 filaments at max 3 tubes, see table ‘focus number CU EZ139 (0..8
= max 9)’ |
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CU checksum fil: |
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Read status Trace
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Displays the last 10 activities with
FU_mA. All fields have several entries possible. details to be continued |
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time |
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relative time [ms] of the last 10 status changes |
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foc |
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see table (‘focus number FU-mA’) |
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old sta |
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old static condition before status change |
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old dyn. |
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old dynamic condition before status change |
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signal |
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status change command |
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new sta |
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new static condition after status change |
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new dyn. |
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new dynamic condition after status change |
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Read Error
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Error: Info
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Displays an error code and sometimes the reason for the
error entry. |
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class: |
Three error classes are possible: |
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warning: |
Something happened being worth to be logged in the trace. Warnings are logged, but they are not displayed at the control desk and do not lead to a switch off of the exposure. If analog measurements e.g. increase the first limit,
there will be an internal warning entry, which can be fixed during
maintenance |
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error: |
An error always leads to an exposure off command. The error code will be displayed
at the control desk, which can be reset with the reset labeled button or with any other. |
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fatal: |
Fatal errors might be displayed at the control desk, but
not in all cases. If there is a communication breakdown a fatal errormight
not be possible on the CAN bus.As all error entries are logged in CU the
information has to get to CU. None of the units has a memory to keep the fatal condition when the
generator has been turned off. So the information is lost. The only way to
log it is by pushing the on button
to warm reset the generator. Then the fatal error condition might be
transmitted to CU. |
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error code: |
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The error code is a 4 digit code. - The first 2 digits represent the function unit, see table in Service manual FAULTFINDING. -
The last 2 digits give details of the error code, see
details in Service manual FAULTFINDING. |
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error
explanation: |
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gives a brief explanation |
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task name: |
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is the task name of the function unit process during the
error |
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procedure
name: |
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is the procedure name of the FU process during the error |
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previous
warning: |
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might display a previous message |
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previous
explanation: |
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might display a previous explanation |
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parameter: |
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might be displayed if available |
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Error: Actual Status
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Displays actual status during error: see ‘Read
Actual Status’ |
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Error: Status Trace
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Displays status trace during error, only 3 entries: see ‘Read Status
Trace’ |
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Error: HW Set Values
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If SW set (filament circuit
1) [mA]: |
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filament current setpoint |
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If SW set (filament circuit
2) [mA]: |
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filament current setpoint filament
circuit: see table |
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FI ON (filament circuit 1): |
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on = filament circuit 1 active (small focus) -if all ready conditions present, activates triac V36 on EZ119 for intermediate DC circuit, but only in case of a two filament tube off = filament circuit 1 inactive, e.g. - during start up - during adap of large focus - error condition -
single focus tube (using large only) |
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FI ON (filament circuit 2): |
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on = filament circuit 2 active (large focus) if all ready conditions present, activates triac V36 on EZ119 for intermediate DC circuit off = filament circuit 1 inactive, e.g. - during start up - during adap of small focus - error condition |
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EN_STOP_X: |
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on = off. = |
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EN_X_ACT: |
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on = off = |
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GRID control: |
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on = off = |
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GRID mode: |
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on = off = |
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Error: Read HW Values
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IF nominal |
(filament circuit 1) [mA]: |
filament current setpoint small focus (see table) |
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(ilament circuit 2) [mA]: |
filament current setpoint large focus (see table) |
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IF actual |
(ilament circuit 1) [mA]: |
(filament
current actual value small focus measuring point EZ119 X5 - (X8 gnd) 2.5A / V |
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(ilament circuit 2) [mA]: |
(filament
current actual value large focus measuring point EZ119 X7 - (X8 gnd) 2.5A / V |
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intermed circuit voltage (fil. cir. 1) [V]: |
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intermediate DC supply of filament converter 1 small focus (typically 325VDC) |
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intermed circuit voltage (fil. cir. 2) [V]: |
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intermediate DC supply of filament converter 2 large focus (typically 325VDC) |
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FU-mA version: |
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hardware version of FU_mA |
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CAN identifier: |
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address of unit on the CAN bus ignore
for troubleshooting |
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CTRL_X_C: |
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on / off = status of CTRL_X_C/ signal during event |
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X_ACT_S: |
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on / off = status of X_ACT_S/ signal during event |
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Error: Specific
Informations
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might display information if relevant for event |
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Functional Tests
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test watchdog |
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activates watchdog of FU_mA, red LED turns on and remains on, activate warm reset to restart generator no PC access & communication during this (FATAL ERROR)
status |
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Monitoring
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read If nominal |
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type in filament circuit number, see table ‘filament converter on FU-mA EZ119’ |
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read If actual |
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type in filament circuit number, see table ‘filament converter on FU-mA EZ119’ |
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read intermed circuit voltage |
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type in filament circuit number, see table ‘filament converter on FU-mA EZ119’ |
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read Ie measuring trace |
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A ‘table’ of 100 individual screen comes up, screen 1/100 is the last logged value, 100/100 the oldest. The mA value is measured every 2 ms. With low mA values
(e.g. during fluoro or low-mAs tomo) there might be 0mA entries. |
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read 8 bit port |
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ignore
for troubleshooting |
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read 16 bit port |
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ignore
for troubleshooting |
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read memory |
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ignore
for troubleshooting |
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Read Ie corrections |
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foc |
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filament number, see table
‘focus number FU-mA’ |
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Ie offset valid |
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usual display: |
Ie offset O.K |
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correction active |
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default display: if tube adapted: |
Ie offset corr. active Ie offset + R corr. active |
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ofs [uA] |
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default mA offset current value of mA measuring circuit
G100 = 4000uA corrected value appears after adaptation |
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R [Mohm] |
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default value (no tube or nor adapted) = 0 MOhm |
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Adaptation Results
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Select Adaptation Table for Reading |
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Only possible with an adapted filament |
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focus: |
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type in filament number, see
table ‘focus number FU-mA’ |
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U [kV]: |
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type in a kV value between 40...150kV (or whatever the
limit is) |
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Read Previously Selected Adaptation Table |
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Displays tables of different sizes (kV stage dependent)
after the filament has successfully been adapted. |
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If [mA]
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filament current lowest value highest value |
= = |
standby filament current upper filament current limit + a little bit on top |
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table size depends on the filament current mA steps
(individual for every kV stage) |
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Ie [uA] : |
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emission current at the given filament current |
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boost time [ms] : |
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how long it takes to boost up from a specific emission
current (filament temperature) to a higher emission current (higher
temperature) with the boost current = max filament current + 2A
(positive boost) |
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blank time [ms] : |
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how long it takes for the filament to ‘cool down’ from a
specific emission current to a lower emission current (negative boost) |
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to get to a lower mA value the filament current goes down
to 0.5A |
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typically the negative boost time is 2-3 times positive
boost time |
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