Fluke 28 II Ex User Manual

True-rms Digital Multimeter
MIN MAX Recording Mode
35
MIN MAX Recording Mode
The MIN MAX mode records minimum and maximum
input values. When the inputs go below the recorded
minimum value or above the recorded maximum value,
the Product beeps and records the new value. This mode
can be used to record intermittent measurements, record
maximum measurements while you are away or record
measurements while you operate the equipment under
test and cannot look at the Product. MIN MAX mode can
also calculate an average of all measurements since the
MIN MAX mode was started. To use MIN MAX mode,
refer to the functions in Table 8.
Response time is the length of time an input must stay at
a new value to be recorded. A shorter response time
records shorter events, but with decreased accuracy. All
recorded measurements are erased when you change
the response time. The Product has 100 millisecond and
250 μs (peak) response times. The 250 μs response time
is indicated by “” on the display.
The 100 millisecond response time is best for power
supply surges, inrush currents, and intermittents.
The average value (AVG) shown in the display is the
mathematical integral of all measurements since the start
of recording (overloads are discarded). The average
value is useful to smooth out unstable inputs, calculate
power consumption, or to get a percentage of time
estimate on how long a circuit is on.
Min Max records the signal extremes that are longer than
100 ms.
Peak records the signal extremes that are longer than
250 μs.
Smooth Feature (Power Up Option Only)
When the input signal changes quickly, “smoothing” gives
a more stable measurement on the display.
To use the smooth feature:
1. Hold down C while you turn the Product on. The
display shows “'---” until C is released.
2. The Smoothing icon () will appear on the left side
of the display to let you know that smoothing is on.

Fluke 28 II Ex Specifications

General

Diode test	Yes
Product type	Digital multimeter
Product color	Black, Red
Frequency range	0.0005 - 199.99 kHz
DC current range	0.0000001 - 10 A
DC voltage range	0.0001 - 1000 V
Resistance range	0.1 - 50000000 Ω
Measuring category	CAT IV 600V
Placement supported	Handheld multimeter
Basic accuracy (frequency)	0.005%
Basic accuracy (DC current)	0.2%
Basic accuracy (DC voltage)	0.05%
Temperature measurement range	-200 - 1090 °C
Battery type	AAA
Power source	Battery
Battery technology	Alkaline
Number of batteries supported	3
Operating altitude	0 - 2000 m
Maximum storage altitude	10000 m
Operating relative humidity (H-H)	0 - 80 %

Weight and Dimensions

Depth	198.1 mm
Width	100 mm
Height	6.35 mm
Weight	698.5 g