Data Sheet

3 Fluke Corporation Fluke 28II Ex Intrinsically Safe True-rms Digital Multimeter
All the measurement functions of
Fluke’s most popular industrial DMMs.
One tool equips you with all the testing and trou-
bleshooting power you need wherever
you go—inside or outside the IS zones listed
above. No need to carry different meters for
different areas, or worry about crossing through
an Ex-required zone with a non-Ex rated
instrument.
• 4-1/2 digit mode for precise measurements
(20,000 counts)
• True-rms ac voltage and current for accurate
measurement on nonlinear signals
• Measures up to 1000V and 10A ac and dc
(note that Ex zones require reduced measure-
ments)
• Low pass filter ensures accurate voltage and
frequency measurements on variable speed
motor drives (VSDs)
• Frequency to 200 kHz and % duty cycle to
help you diagnose VSDs and switching power
supplies
• Resistance, continuity and diode test
• 10,000 μF capacitance range for components
and motor caps
• Conductance measurements for high resistance
or leakage tests
• Min/Max/Avg and Peak capture to record
transients and variations automatically
• Relative mode to remove test lead interference
on resistance measurements
• Auto and manual ranging for maximum
flexibility
• Input Alert protects you by chirping and
flashing “Lead” when leads are plugged into
the wrong inputs
Easy to use
Important extras keep you productive in sub-
optimal conditions.
• Backlit keypad buttons provide extra visibility
in poorly lit areas, even when you’re wearing
full PPE
• Large display digits and 2-level bright white
backlight also increases visibility
• Long battery life—400 hours typical without
backlight (Alkaline)
• Optional magnetic hanger for easy setup
and viewing while freeing your hands for
other tasks
Easy to service in the field
Access to the separate battery compartment
makes it easy to change batteries or fuses
without jeopardizing instrument calibration.
Basic accuracy specifications
Accuracy specifications are shown as
± (% of reading + number of digits)
DC voltage Range: 0.1 mV to 1000 V
Accuracy: ± 0.05 % + 1
AC voltage Range: 0.1 mV to 1000 V
Accuracy: ± 0.7 % +4
DC current Range: 0.1 μA to 10 A
Accuracy: ± 0.2 % + 4
AC current Range: 0.1 μA to 10 A
Accuracy: ± 1.0 % + 2
Resistance Range: 0.1 Ω to 50 MΩ
Accuracy: ± (0.2 % + 1)
Conductance Range: 60.00 nS
Accuracy: ± (1.0 % + 10)
Diode Test Range: 2.0 V
Accuracy: ± (2.0 % + 1)
Duty Cycle Range: 0.0 % to 99.9 %
Accuracy: Within
± (0.2 % per kHz + 0.1 %)
for rise times <1 µs
Display counts 6000 counts/19,999 counts in
high-resolution mode
Capacitance Range: 10 nF to 9999 μF
Accuracy: ± (1.0 % + 2)
Frequency Range: 0.5 Hz to 199.99 kHz
Accuracy: ± (0.005 % + 1)
Temperature Range: -200 °C to +1090 °C
(-328 °F to +1994 °F)
Accuracy: ± (1.0 % + 10) °C
[± (1.0 % + 10) °F]
General specifications
Power Three AAA batteries
Battery life: 400 hours
Display LCD, with backlight
Data storage Peak transient capture 250
μS
Min/Max/Avg, Reading hold
External protection Rubber holster
Warranty Three years
Size (HxWxL)
with holster
6.35 cm x 10.0 cm x 19.81
cm
(2.5 in x 3.93 in x 7.8 in)
Weight with holster 698.5 g (1.54 lb)