Fluke 45 - Page 19

Introduction and Specifications
Specifications
1
1-7
Response Times
Refer to Chapter 4 of the Users Manual for detailed information.
DC Voltage
Resolution Accuracy
Range
Slow Medium Fast (6 months) (1 year)
300 mV
3 V
30 V
300 V
1000 V
-
-
-
--
-
10 µV
100 µV
1 mV
10 mV
100 mV
100 µV
1 mV
10 mV
100 mV
1 V
0.02% + 2
0.02% + 2
0.02% + 2
0.02% + 2
0.02% + 2
0.025%+2
0.025% +2
0.025%+2
0.025% +2
0.025%+2
100 mV
1000 mV
10 V
100 V
1000 V
1 µV
10 µV
100 µV
1 mV
10 mV
-
-
-
-
-
-
-
-
-
-
0.02% + 6
0.02% + 6
0.02% + 6
0.02% + 6
0.02% + 6
0.025%+6
0.025% +6
0.025%+6
0.025% +6
0.025%+6
Input Impedance
10 MΩ in parallel with <100 pF
Note
In the dual display mode, when the volts ac and volts dc functions are
selected, the 10 M
Ω dc input divider is in parallel with the 1 M Ω ac
divider.
Normal Mode Rejection Ratio
>80 dB at 50 or 60 Hz, slow and medium rates
>54 dB for frequencies between 50-440 Hz, slow and medium rates
>60 dB at 50 Hz, fast rate (Note: Fast rate has no filtering)
Maximum Allowable AC Voltage While Measuring DC Voltage
Peak Normal Mode Signal
Range Max Allowable Peak AC Voltage
NMRR* >80dB** NMRR >60 dB**
300 mV 100 mV 20 V 15 V 15 V
3 V 1000 mV 20 V 15 V 15 V
30 V 10 V 1000 V 50 V 300 V
300 V 100 V 1000 V 50 V 300 V
1000 V 1000 V 1000 V 200 V 1000 V
* NMRR is the Normal Mode Rejection Ratio
** Normal Mode Rejection Ratio at 50 or 60 Hz ± 0.1%
Common Mode Rejection Ratio
>90 dB at dc, 50 or 60 Hz, (1 kΩ unbalanced, medium and slow rates)