Operation and Function Principle of the GM 80-Data Logger
The data logger can, if the GM 80 is not in the measuring mode, be read by the menu option 2,7 LOGG - SENDING or by
the command "A" via the interface. Outside of the measuring mode the data logger is deleted only by the menu option 2,7
LOGG - DELETION.
If the GM 80 is in the measuring mode, the data logger can be read with the command "A" and be deleted with the
command "B".
If the measuring mode is being switched on from the menu option 1MEASURING-sensor selection,
the starting time of the measurement, the current sensor designation, the final value of the measuring range, the adjusted
measuring rate and the logger mode (e.g.: AUTO 1ms) are saved in the logger.
NOTE: All previous measured values are deleted here!
With the read-out of the data logger via the serial interface different adjustments are sent from the GM 80.
a) Company header
b) Starting time of the measurement
c) Sensor designation
d) Final display value
e) Adjusted measuring rate
f) Adjusted logger mode
g) Thereafter the measured values
In the HAND MODE the measured values are always logged with the time. The measured value is logged at the data in the
AUTOMODE. A time can be assigned to each measured value by the indicated starting time.
Since in GRAPHS and in the WINDOW MODE trigger events smaller than 1sec can occur, an additional time log is not
possible.
Adjustments in the Logg Mode
LOGG OUT
: Here the data logger is switched off. The logg mode in the measuring mode is switched to
"LOGG OUT" as soon as the entire data logger has been edited.
HAND
: In this mode a measured value is written into the data logger when the enter key was pressed at the GM 80. By an
additional logg of time, there is a time assignment for each measured value.
AUTO
: In this mode in the adjusted Delay a measured value is written into the data logger. By the stored starting time there
is a time assignment for each measured value.
GRAPH
: In this mode at a trigger event a measured value is written into the logger. Since the trigger pulses occur in 10ms
raster, an additional logg of the time is not possible. The flank of the trigger pulse must stand on HIGH for 4ms at least.
Afterwards on LOW for at least 6ms.
WINDOW
: This mode reacts to increasing and/or decreasing flanks. At an increasing flank the logging of the measured
values is started. From now on the measured values are written in the data logger with 1ms raster. A decreasing flank ends
the recording.
TRIGGER2:
This mode functions like the graph mode, however, here the MIN value and the MAX value
are set back at a recognized trigger pulse. The display is set back to the display mode which was adjusted in
menu 2.9 INPUT-DISPLAY.
