CRANEX
®
Novus e 1. General information
Service manual 5
1.6 Yearly maintenance
The following tests and inspections must be carried out
annualy by an authorized service person to verify that
the unit meets the specifi cations and performance crite-
ria essential for correct and safe operation.
When taking measurements that require a multimeter,
always use a digital multimeter (DMM).
mA test
WARNING: X-rays are generated when this test is car-
ried out. PROTECT YOURSELF FROM RADIATION.
1. Connect the +probe of a DMM to test pin TP18
(mAfb) and the -probe to TP17(GND) on the L1800
Generator board.
2. Select service command exp and an exposure time
of 2000 ms (refer to section 4 Service assistant and
service functions, in this manual).
3. Protect yourself from radiation and take an expo-
sure. Check the feedback values from the DMM.
The feedback values must be within the tolerance.
Selected mA mAfb (V) Tolerance (V)
8 1.58 ±0.15 (1.43 - 1.73)
10 2.0 ±0.15 (1.85 - 2.15)
If the value is not within the tolerance, recalibrate
the Generator board, see section 5.2 Service Com-
mands (the calib command).
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