Fluke 374 FC - Calibration Adjustment

Clamp Meter
Calibration Adjustment
9
Table 2. Performance Tests (cont.)
Calibration Adjustment
Use the calibration procedures to adjust the Product so that the values shown on the Product correspond as closely
as possible with the actual measured values. Table 3 is a list of the equipment required for the calibration adjustment.
Function Calibrator Output 374 FC 375 FC 376 FC 902 FC
Meter Reading Limit
Lower Limit Upper limit

ADC
with 50 turns coil
-19.5 A X X
√
X -995 A -955 A
-12 A
√ √ √
X -612.5 A -587.5 A
-0.2 A
√ √ √
X -10.7 A -9.3 A
0.2 A
√ √ √
X 9.3 A 10.7 A
2 A
√ √ √
X 97.5 A 102.5 A
12 A
√ √ √
X 587.5 A 612.5 A
19.5 A X X
√
X 955.0 A 995.0 A

iFlex Current
Probe (with
simulation)
3 mV, 50 Hz
√ √ √
X 96.5 A 103.5 A
27 mV, 50 Hz
√ √ √
X 872.5 A 927.5 A
60 mV, 50 Hz
√ √ √
X 1935 A 2065 A
75 mV, 50 Hz
√ √ √
X 2420 A 2580 A
750 mV, 500 Hz
√ √ √
X 2420 A 2580 A

iFlex Current
Probe (with 50
turns r-coil)
0.2 A, 50 Hz
√ √ √
X 9.2 A 10.8 A
10 A, 50 Hz
√ √ √
X 484.5 A 515.5 A
18 A, 50 Hz
√ √ √
X 872.5 A 927.5 A
6 A, 440 Hz
√ √ √
X 290.5 A 309.5 A

μADC
0 μA X X X
√
-0.5 μA 0.5 μA
10 μA X X X
√
9.4 μA 10.6 μA
200 μA X X X
√
197.5 μA 202.5 μA
-200 μA X X X
√
-202.5 μA -197.5 μA

Temperature
-40 °C X X X
√
-41.2 °C -38.8 °C
0 °C X X X
√
-0.8 °C 0.8 °C
50 °C X X X
√
48.7 °C 51.3 °C
400 °C X X X
√
395.2 °C 404.8 °C
Table 3. Required Equipment
Equipment Required Characteristics Recommended Model
Calibrator 4.5-digit resolution Fluke 55xxA Calibrator
Wired coil 50 turns 5500A/COIL
Test Lead for iFlex -- PN 666602
Test Lead for other -- PN 2070140
Power Supply +3.0 V
Common power supply or a 2 x AA or AAA
battery container