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EXTECH MA140 [18/21] Specifications

MA44x‐en‐GB_V1.0 8/16

Specifications

Electrical Specifications

Accuracy is given as ± (% of reading + least significant digits) at 23C ±5C with relative humidity ≤ 75%.

Accuracy is specified for a period of one year after calibration.

1. Temperature Coefficient is 0.1 x specified accuracy / C, < 18C (64.5F), > 28C (82.4F)

2. MA443/MA445 AC Functionality: ACV and ACA specifications are AC coupled, True RMS; For non‐

sinusoidal waveforms, additional accuracy Crest Factor (C.F.) considerations exist as detailed below:

Function Range Resolution Accuracy (reading) ‘OL’ Protection

AC Current

4.000 A* 0.001 A ± (2.5% + 30 digits)

400A

40.00 A 0.01 A ± (1.8% + 9d) MA440

± (2.5% + 5d)

MA443/MA445

400.0 A 0.1 A

*4ArangeonMA44

onl



TrueRMScurrent(MA443andMA445only)applicableto10%~100%ofrange

Frequencyresponse:50~60Hz(MA440andMA443)and40~400Hz(MA445)

MA443/MA445ACCrestfactorconsiderations:

a)Add4%(MA443)3%(MA445)whenwavefactoris1~2

b)Add6%(MA443)5%(MA445)whenwavefactoris2

~2.5

c)Add8%(MA443)7%(MA445)whenwavefactoris2.5~3

DC Current (MA445)

40.00 A 0.01 A

± (2.0% + 3 digits) 400A

400.0 A 0.1 A

UsetheZEROfunctiontonulldisplay(residualmagnetism)beforetakingameasurement.

AC Voltage

4.000V 0.001V

± (1.2% + 5 digits)

600V AC/DC

40.00V 0.01V

400.0V 0.1V

600V 1V ± (1.5% + 5 digits)

TrueRMSvoltage(MA443andMA445)applicableto10%~100%oftherange

InputImpedance:≥10MΩ;FrequencyResponse:50~60Hz(MA440andMA443)and40~400Hz(MA445)

MA443/MA445ACCrestfactorconsiderations:

a)Add3%whenwavefactoris1~2

b)Add5%whenwavefactoris2~2.5

c)Add7%whenwavefactoris2.5~3

DC Voltage

400.0mV 0.1mV ± (1.0% + 5 digits)

600V AC/DC

4.000V 0.001V ± (0.8% + 1 digit)

40.00V 0.01V

± (0.8% + 3 digits)

400.0V 0.1V

600V 1V ± (1.0% + 3 digits)

InputImpedance:≥10MΩ

EXTECH MA140 [18/21] Specifications

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