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Detailed Specifications; Ac Voltage Measurements; Dc Voltage, Continuity, Resistance, Diode Test, And Capacitance Measurements; Ac Current With Iflex I2500 - Fluke 279 FC Calibration Manual

True-rms thermal multimeter
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Detailed Specifications

For all specifications: Accuracy is specified for 1 year after calibration, at operating temperatures of 18 °C to 28 °C,
with relative humidity at 0 % to 90 %. Accuracy specifications take the form of ±([% of Reading] + [Number of least
significant digits]).

AC Voltage Measurements

[1]
Resolution
Range
600.0 mV
0.1 mV
6.000 V
0.001 V
60.00 V
0.01 V
600.0 V
0.1 V
1000 V
1 V
[1]
All ac voltage ranges are specified from 1 % of range to 100 % of range.
Crest factor of ≤3 at 4000 counts, decreasing linearly to 1.5 at full scale.
[2]
[3]
For non-sinusoidal waveforms, add –(2 % of reading + 2 % full scale) typical, for crest factor up to 3.
7
[4]
Do not exceed 10
V-Hz.
[5]
Full-time low-pass filter.

DC Voltage, Continuity, Resistance, Diode Test, and Capacitance Measurements

Function
Range
600.0 mV
6.000 V
60.00 V
600.0 V
1000 V
600 Ω
600.0 Ω
6.000 kΩ
60.00 kΩ
600.0 kΩ
6.000 MΩ
50.00 MΩ
Diode Test
2.000 V
1000 nF
10.00 µF
100.0 µF
9999 µF
[1]
In the 9999 µF range for measurements to 1000 µF, the measurement accuracy is 1.2 % + 2.
[1]

AC Current with iFlex i2500

Range ..................................................................... 1.0 A ac to 2500 A ac
Resolution
1.0 A to 999.9 A .................................................. 0.1 A
1000 A to 2500 A ................................................ 1 A
Measurement......................................................... 3 % ±5 digits (45 Hz to 500 Hz)
Crest Factor (50 Hz/60 Hz) add 2 % for C.F. >2
1100 A................................................................. 3.0
1400 A................................................................. 2.5
2500 A................................................................. 1.42
45 Hz to 65 Hz
±(1.0 % + 3)
Resolution
0.1 mV
0.001 V
0.01 V
0.1 V
1 V
1 Ω
Meter beeps at <25 Ω, beeper detects opens or shorts of 600 µs or longer.
0.1 Ω
0.001 kΩ
0.01 kΩ
0.1 kΩ
0.001 MΩ
0.01 MΩ
0.001 V
1 nF
0.01 µF
0.1 µF
1 µF
True-rms Thermal Multimeter
[2][3][4]
Measurement
65 Hz to 200 Hz
±(1.0 % + 3)
±(4.0 % + 3)
[5]
Measurement
0.09 % + 2
0.09 % + 2
0.15 % + 2
0.5 % + 2
0.5 % + 1
1.5 % + 3
1 % + 2
1.2 % + 2
10 % typical
Detailed Specifications
200 Hz to 500 Hz
±(15.0 % + 3)
[5]
5

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