NOMEX
Operating Manual - Error Messages and Erroneous Measurements
76
D909.131.00/02 en
Problem
Cause
Remedy
The measured tube volt-
age was smaller than
expected.
The sensitivity mode
High
is set.
Thus, a mean tube voltage will
be determined that is lower than
kV
max
. The measured values for
kVp
max
, kVp
mean
and PPV are iden-
tical.
Set the sensitivity mode
Normal
.
The sensitivity mode
High
is intended
for measuring low dose rates at DC/HF
tube voltages. The recommended mini-
mum measuring time is 5 seconds.
– The
measurement
exhibits an extreme field
size dependence.
– The measured tube volt-
age was higher or
smaller than expected.
– The measured values
shown are completely
wrong.
The measurement area of the
NOMEX multimeter is not fully irra-
diated.
Enlarge the radiation field to the required
measurement area at minimum (refer to
section
3.2 "Positioning the NOMEX Mul-
).
