User manual
H82.0.02.6C-05   Operating Manual GMH 5150  page 15 of 22 
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At measuring kind "rAtE-Slo a power saving function is selectable: Lo.Po. If activated a 
measurement is only done if it is also logged (i.e. no additional measurements between the saved 
values). This seriously reduces the power consumption and is therefore especially appropriate for 
long-term measurements (e.g. leak test) without an external power supply. 
a) Start recording: 
Press “store” for 2 seconds: Start Menu, press   again: automatic recording will be started. 
saved data set. 
If the logger memory is full, the recording stops automatically and the display shows 
If Low-Power-Logger-Function Lo.Po = on the device switches itself off as soon as the memory gets filled. 
b) Stop recording:
Press “store” for 2 seconds: 
Select with   or  . 
Do not stop recording 
(cancel menu) 
Stop recording 
 
If you try to switch off the device while cyclic recording is active you will be asked whether the 
recording should really be stopped. 
The device can only be switched off if the recording is stopped. 
Auto-off function is deactivated as long as cyclic recording is active. 
c) Clear recordings: 
Press “store” for 2 seconds: If there are data sets stored and recording is already stopped 
 is displayed
Select  with   or   to call the clear-menu 
Select with   or  . 
Clear nothing (cancel menu) 
Clear all recordings 
Clear the last recording 
 










