RIGOL 
  
Service Guide for DM3000 Series 
 
Calibration Notice 
 
Calibration Interval 
 
The  multimeter  should  be  calibrated  on  a  regular  interval  determined  by  the 
measurement accuracy requirement of your application. Generally, a 90 days interval 
is recommended,  also a 1-year interval could  be used for calibrating depending on 
your actual requirement. RIGOL does not recommend extending calibration intervals 
beyond 1 year for any application. 
 
Whatever calibration interval you select, RIGOL suggests that completing 
re-adjustment should always be performed in conformity to its regulations offered by 
RIGOL during calibrating. If you actually do this, a good performance will be hold 
within interval to next calibration or longer.     
 
 
Calibration Explanations 
 
During  calibrating,  the  calibration  factor  is  determined  by  current  input  value  and   
saved in non-volatile memory and will not be changed until next calibration. Basically   
two  steps  should  be  performed  during  calibrating:  Zero  Adjustment  and  Gain 
Adjustment (except for AC and frequency measurement).