True-rms Multimeters 
 General Specifications  
 23 
 
Table 2. Input Characteristics 
Function 
Input Impedance 
(Nominal) 
Common Mode Rejection Ratio
(1 kΩ Unbalanced) 
Normal Mode 
Rejection 
Volts AC  >5 MΩ <100 pF  >60 dB at dc, 50 or 60 Hz   
Volts DC 
>10 MΩ <100 pF  >100 dB at dc, 50 or 60 Hz 
>60 dB at 50 or 60 
Hz 
Auto-V LoZ  ~3 kΩ <500 pF  >60 dB at dc, 50 or 60 Hz   
 
Open Circuit Test Voltage Full Scale Voltage 
Short Circuit 
Current 
To 6.0 MΩ 40 MΩ Ohms  <2.7 V dc 
<0.7 V dc  <0.9 V dc 
<350 μA 
Diode Test  <2.7 V dc  2.000 V dc  <1.2 mA