Fluke Biomedical 190M - Manual (Page 124)

190M Series Medical ScopeMeter
Users Manual
114
Automatic Scope Measurements
The accuracy of all readings is within
±
(% of reading +
number of counts) from 18 ° C to 28 ° C. Add 0.1x (specific
accuracy) for each
°
C below 18
°
C or above 28
°
C. For
voltage measurements with 10:1 probe, add probe
accuracy, see section ‘10:1 Probe’ on page 127. At least
1.5 waveform periods must be visible on the screen.
General
Inputs .............................................................. A, B, C and D
DC Common Mode Rejection Ratio (CMRR)......... >100 dB
AC Common Mode Rejection at 50, 60, or 400 Hz ....... >60 dB
DC Voltage (VDC)
Maximum Voltage
with 10:1 probe ...................................................... 1000 V
direct (1:1) .................................................................300 V
Maximum Resolution
with
10:1 probe .......................................................... 1 mV
direct (1:1) .............................................................. 100 µV
Full Scale Reading ............................................. 999 counts
Accuracy at 5 s to 10
μ
s/div
2 mV/div ..........................................
±
(1.5 % + 10 counts)
5 mV/div to 100 V/div .........................
±
(1.5 % + 5 counts)
Normal Mode AC Rejection at 50 or 60 Hz ............. >60 dB
AC Voltage (VAC)
Maximum Voltage
with
10:1 probe .................................................... 1000 V
direct (1:1) ............................................................. 300 V
Maximum Resolution
with 10:1 probe ....................................................... 1 mV
direct (1:1) ........................................................... 100 µV
Full Scale Reading .......................................... 999 counts
Accuracy
DC
coupled:
DC to 60 Hz .................................
±
(1.5 % +10 counts)
AC coupled, low frequencies:
50
Hz direct (1:1) ........................
±
(1.5 % + 10 counts)
60 Hz direct (1:1) ........................
±
(1.9 % + 10 counts)
With the 10:1 probe the low frequency roll off point will
be lowered to 2 Hz, which improves the AC accuracy
for low frequencies. When possible use DC coupling
for maximum accuracy.
AC or DC coupled, high frequencies:
60 Hz to 20 kHz ..........................
± (2.5 % + 15 counts)
20 kHz to 1 MHz ............................
±
(5 % + 20 counts)
1 MHz to 25 MHz .........................
±
(10 % + 20 counts)
For higher frequencies the test tool’s frequency roll off
starts affecting accuracy.
Normal Mode DC Rejection .............................. >50 dB