Start-up and functional test of the IONTOMAT
11 - 9
Siemens-Elema AB
Register 3
SP B7-230.033.07
Page 9 of 12
Mammomat 1000/3000
Solna, Sweden
Rev. 03
11.99
SPS-UD
Installation and Start-Up
Checking the automatic transparency adaption
11
Check the automatic transparency adaption with a grid table with 20, 40 and 60 mm plexi
at the voltage(s) preferred by the customer (within 25-35 kV) and all anode/filter combina-
tions. If the dose rate is too low (error 013 or "Limit"), use 50 mm plexi instead of 60 mm.
Tolerance:
≤
0.3 density difference at constant voltage and thickness 20-60 mm.
≤
0.3 at constant thickness and 25-35 kV.
These limits apply for film with max. gamma 4.0 measured at the density chosen.
Tolerance valid for grid tables and film/screen combination
according to table 1.
The film density levels may vary from cassette to cassette. There-
fore, be sure to use one and the same cassette for all test expo-
sures.
NOTICE
NOTICE
