Fluke 123 - Page 20

Fluke 123/124/125
Service Manual
2-6
Common Mode Rejection (CMRR) >100 dB @ DC
>60 dB @ 50, 60, or 400 Hz
Full Scale Reading 5000 counts
Move influence ±6 counts max.
True RMS Voltages (VAC and VAC+DC)
Ranges 500 mV, 5V, 50V, 500V, 1250V
Accuracy for 5 to 100% of range
DC coupled:
DC to 60 Hz (VAC+DC) ±(1% +10 counts)
1 Hz to 60 Hz (VAC) ±(1% +10 counts)
AC or DC coupled:
60 Hz to 20 kHz ±(2.5% +15 counts)
20 kHz to 1 MHz ±(5% +20 counts)
1 MHz to 5 MHz ±(10% +25 counts)
5 MHz to 12.5 MHz ±(30% +25 counts)
5 MHz to 20 MHz ±(30% +25 counts), excluding test leads or
probes
AC coupled with 1:1 (shielded) test leads:
60 Hz (6 Hz with 10:1 probe) -1.5%
50 Hz (5 Hz with 10:1 probe) -2%
33 Hz (3.3 Hz with 10:1 probe) -5%
10 Hz (1 Hz with 10:1 probe) -30%
DC Rejection (only VAC) >50 dB
Common Mode Rejection (CMRR) >100 dB @ DC
>60 dB @ 50, 60, or 400 Hz
Full Scale Reading 5000 counts
The reading is independent of any signal
crest factor.
Move influence ±6 counts max.
Peak
Modes Max peak, Min peak, or pk-to-pk
Ranges 500 mV, 5V, 50V, 500V, 1250V
Accuracy:
Max peak or Min peak 5% of full scale
Peak-to-Peak 10% of full scale
Full Scale Reading 500 counts
Frequency (Hz)
Ranges 1Hz, 10Hz, 100Hz, 1 kHz, 10 kHz,
100 kHz, 1 MHz, 10 MHz, and 50 MHz
(Fluke 123) or 70 MHz (Fluke 124, 125).
Frequency Range for Continuous Autoset 15Hz (1Hz) to 50 MHz