Geiger Counter 523545
AC513545
p.
4/4
GM voltage
The tube voltage can be adjusted in increments of
10 V. Nominal voltage is 500 V.
It is possible to follow the count rate (
CPS
) in the
secondary display while the voltage is adjusted.
Thus, one can fairly easily estimate the knee
voltage of the tube. This should be done by
increasing
the voltage as the response time is
somewhat longer when the voltage is reduced.
Press
CAL
and adjust the voltage with
and
.
Select with
CAL
.
This setting returns to default value when the
instrument is turned off.
Setting the default value for the GM voltage
Switch off with OFF. Keep
CAL
pressed while
turning on again (until the symbol CAL is
displayed).
Set the voltage with
and
. Select with
CAL
.
Statistics
The instrument keeps track of the maximum,
minimum and average value of the
CPS
and
µSv/h
. The statistics functions start when the
instrument is switched on.
The values are displayed like this:
HOLD
Display: [
HOLD
MAX
]
shows max.
CPS
and
µSv/h
HOLD
= exit
HOLD
Display: [
HOLD
MIN
]
Shows min.
CPS
and
µSv/h
HOLD
= exit
HOLD
Display: [
HOLD
AVG
]
Shows avg.
CPS
and
µSv/h
HOLD
= exit
Resetting
Instead of pressing
HOLD
in the end, press
CAL
to
restart the statistics functions and use the current
values for
CPS
and
µSv/h
as new starting point.
The instrument has a USB-like socket placed under
a cover. This is
not
for connection of USB devices.
(It is used during production for test purposes.)
