Switching On and Off, Erase Function of the On/off Key
Pressing the on/off key switches the instrument on. As long as you keep the on/off key depressed, all
LCD segments are visible and the buzzer is on. This allows checking LCD and buzzer. The LCD test
After releasing the on/off key the 6150AD displays its software version (firmware version, program
version) for two seconds (»/E« models only):
After that the 6150AD displays battery voltage for two seconds to give you automatically an idea about
the initial battery condition:
After that the 6150AD goes to its ground state, that is dose rate indication.
If the pre-dose is non-zero (may occur with 6150AD3/4/5/6 only), then after battery voltage indication
the instrument will first indicate the pre-dose to emphasize that there is one. You now have to decide
whether you want to clear it or keep it as an initial value for dose accumulation:
If you want to clear it, press the on/off key twice within three seconds. After the second push the
instrument will clear the dose and then automatically turn to dose rate indication.
If you want to keep it, move the instrument to dose rate indication using the function key (arrow
key). Should the pre-dose have triggered dose alarm, you may also move to dose rate indication by
It depends on the model how to switch off. The 6150AD1/2 only requires a single push on the on/off key,
no matter which state it is currently in. The 6150AD3/4/5/6 has to be in dose rate indication state; while
in this state, press the on/off key twice within three seconds. After the second push the instrument will
switch off. This shall prevent switching off by mistake or by chance.
In addition to switching on and off, the 6150AD3/4/5/6 uses the on/off key to erase some values. Pressing
that key twice within three seconds performs the following functions:
In state »mean value indication«, the current dose rate mean value will be cleared and the calculation
of a new mean value will start. With the 6150AD1/2, the only way to restart the mean value
calculation is to switch off and on again, or to connect or disconnect a probe.
In state »maximum value indication«, the current dose rate maximum value will be cleared and the
determination of a new maximum value will start. With the 6150AD1/2, the only way to restart the
maximum value determination is to switch off and on again, or to connect or disconnect a probe.
In state »dose indication«, the dose will be reset to zero and dose accumulation starts again from
zero. However, as already mentioned above, resetting of dose is only possible for the internal
indication of program version (p v)
indication of battery voltage in volt units
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