Fluke 27-II Calibration Information

27 II/28 II
Calibration Information
8
Frequency Counter Sensitivity and Trigger Levels
Minimum Sensitivity (RMS Sine Wave)
Input Range
5 Hz – 20 kHz 0.5 Hz – 200 kHz
Approximate Trigger Level
(DC Voltage Function)
600 mV dc 70 mV (to 400 Hz) 70 mV (to 400 Hz) 40 mV
600 mV ac 150 mV 150 mV -
6 V 0.3 V 0.7 V 1.7 V
60 V 3 V
7 V (≤140 kHz)
4 V
600 V 30 V
70 V (≤14.0 kHz)
40 V
1000 V 100 V
200 V (≤1.4 kHz)
100 V
Duty Cycle (Vdc and mVdc)
Range Accuracy
0.0 % to 99.9 %
[1]
Within ± (0.2 % per kHz + 0.1 %) for rise times < 1 μs.
[1] 0.5 Hz to 200 kHz, pulse width >2 μs. Pulse width range is determined by the frequency by the frequency of the signal.
Input Characteristics
Function
Overload
Protection
Input
Impedance
(nominal)
Common Mode
Rejection Ratio
(1 kΩ unbalance)
Normal Mode Rejection
L
1000 V rms
> 120 dB at dc, 50 Hz or
60 Hz
> 60 dB at 50 Hz or 60 Hz

1000 V rms
10 MΩ <100 pF
> 120 dB at dc, 50 Hz or
60 Hz
> 60 dB at 50 Hz or 60 Hz
K
1000 V rms
10 MΩ < 100 pF
(ac-coupled)
> 60 dB, dc to 60 Hz
Full Scale Voltage Typical Short Circuit Current
Open Circuit
Test Voltage
To 6 MΩ
5 MΩ or
60 nS
600 Ω 6 kΩ 60 kΩ 600 kΩ 6 MΩ 50 MΩ
Ω
1000 V rms <2.8 V dc <850 mV dc <1.3 V dc
500 μA 100 μA 10 μA 1 μA 0.2 μA0.1 μA
G
1000 V rms <2.8 V dc 2.200 V dc 1.0 mA typical
MIN MAX Recording
Accuracy Nominal Response
27 II 28 II
100 ms to 80 %
Specified accuracy ±12 counts for changes
>200 ms in duration
(±40 counts in ac with beeper on)
100 ms to 80 %
(dc functions)
Specified accuracy ±12 counts for
changes >200 ms in duration
120 ms to 80 %
(ac functions)
Specified accuracy ±40 counts for
changes >350 ms and inputs >25 %
of range
250 μs (peak)
[1]
Specified accuracy ±100 counts for
changes >250 μs in duration
(add ±100 counts for readings over
6000 counts)
(add ±100 counts for readings in Low
Pass mode)
[1] For repetitive peaks: 1 ms for single events.

Fluke 27-II Specifications

General

Brand	Fluke
Model	27-II
Category	Multimeter
Language	English