User Manual
2.  If "OL" appears in the display during a measurement, that value 
  you  are  measuring  exceeds  the  range  you  have  selected. 
  Change to higher range. 
Note: 
On  some  low  AC  and  DC  voltage  ranges,  with  the  test  leads  not 
connected to a device, the display may show a random, changing 
reading. This is normal and is caused by the high-input sensitivity. 
The  reading  will  stabilize  and  give  a  proper  measurement  when 
connected to a circuit. 
3.  Press the "POWER" pushbutton to turn the meter on and off. 
4.1. Autoranging / manual range selection 
When the meter is first turned on,  it automatically goes  into Auto-
Ranging.  This  automatically  selects  the  best  range  for  the 
measurements being made and is generally the best mode for most 
measurements.  For  measurement  situations  requiring  that  the 
range be manually held, perform the following: 
1.  Press  the  "RANGE"  button.  The  "AUTO"  indicator  will 
extinguish and the currently selected range will be held. 
2.  Press the "RANGE" button to step through the available ranges 
  until you select the range you want. 
3.  Press  and hold  the "RANGE" button for 2  seconds to  exit the 
  manual ranging mode and return to "AUTO" mode. 
4.2. Backlight 
The  backlight  function  is  used  to  illuminate  the  display  when  the 
meter is used at night or in dimly lighted area. 
1.  Press  the  "HOLD"  button  (P  3355)  or  the  backlight  button 
(P  3360)  for  more  than  2  seconds,  the  "HOLD"  indicator  will 
appear and backlight will be activated. 
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