MA44x‐en‐GB_V1.0 8/16
18
Specifications
Electrical Specifications
Accuracy is given as ± (% of reading + least significant digits) at 23C ±5C 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, < 18C (64.5F), > 28C (82.4F)
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
*4ArangeonMA44
TrueRMScurrent(MA443andMA 445only)applicableto10%~100%ofrange
Frequencyresponse:50~60Hz(MA440andMA443)and40~400Hz(MA445)
MA443/MA445AC Crestfactorconsiderations:
a)Add4%(MA443)3%(MA445)whenwavefactoris1~2
b)Add6%(MA443)5%(MA445)whenwavefactoris2
~2.5
c)Add8%(MA443)7%(MA445)whenwavefactoris2.5~3
DC Current (MA445)
40.00 A 0.01 A
± (2.0% + 3 digits) 400A
400.0 A 0.1 A
UsetheZEROfunctiontonulldisplay(residualmagnetism)beforetakingameasurement.
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)
TrueRMSvoltage(MA443andMA445)applicableto10%~100%oftherange
InputImpedance:≥10MΩ;FrequencyResponse:50~60Hz(MA440andMA443)and40~400Hz(MA445)
MA443/MA445AC Crestfactorconsiderations:
a)Add3%whenwavefactoris1~2
b)Add5%whenwavefactoris2~2.5
c)Add7%whenwavefactoris2.5~3
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)
InputImpedance:≥10MΩ
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