Rec Measured Value Memory; Rs232 Port - VOLTCRAFT GM-70 Notice D'emploi

e) REC measured value memory
The measured value memory records the minimum and maximum field strength values.
• Press the REC button (6) to activate the REC function in measuring mode. 'REC' appears on the LC display (3) in
conjunction with a beep. This indicates that measurement recording is active.
Maximum values
• Press the REC button (6) while recording is active to retrieve the maximum values. The 'RECMAX' symbol appears
on the display and the value is loaded from the memory and displayed.
• To delete the maximum value from the memory, press the HOLD button (5). 'RECMAX' goes out and only 'REC'
remains on the LC display (3). This means that recording continues.
Minimum values
• Press the REC button (6) again while the REC function is active to retrieve the minimum values. The minimum
values are displayed together with 'RECMIN'.
• To delete the minimum value from the memory, press the HOLD button (5). 'RECMIN' goes out and only 'REC'
remains on the LC display (3). This means that recording continues.
• To deactivate the REC function, press and hold the REC button (6): for approx. 2 seconds. The 'REC' symbol goes
out. The currently measured field strength value appears on the LC display (3) again.
The saved measured values are retained in REC mode only. If this function is terminated or the measuring
device is switched off, the memory is deleted.
If you carry out measurements on DC (static) magnetic fields and the REC memory function is switched on,
the north pole N or south pole S indicator cannot change during the measurement. A maximum/minimum
value is based on natural fluctuation of the field strength in the area of a pole.
f) RS232 port
The measuring device is fitted with a serial interface (8) for exchanging data with a computer. This can be found on
the right hand side under a cover.
• Open the flap with a pointed object.
• The interface is in the form of a 3.5 mm jack socket RS232 OUTPUT (8).
• It requires a special data cable (not included) for the transmission of a 16-digit signal. The data cable has the
following components:
3.5 mm jack, mono
Centre contact
External contact
30
9-pin D-SUB socket for PC
Pin 4
Pin 2
A 2.2 KOhm resistor must be fitted between pin 2 and pin 5.