XITRON XT2640 - Page 172

XT2640OperatingManual 13July2016 Page172of187
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28.3.2.1 PRIMARYCURRENTMEASUREMENTACCURACYTABLE
Addrelevanterrorsfromthetablebelowforthemaximumerrorinprimarycurrentmeasurements(e.g.DC,AC,AC+DC,Rectified,
Peak,Valley,Peak‐Valley).
MAXIMUMSCALINGERRORS
Applytoallresultsasshownbelowasapercentageofthereading
Ifsignalcontainssignificantlevelsatmultiplefrequencies,applytoeachlevel&frequency
Specification
Channel
Type
OptionH OptionDHIRange OptionDLORange OptionXHIRange OptionXLORange
BaseScalingError
Applytoallresults
AorL 0.03%
Sor
W
 0.1%(0.2%if2msLF/PERIOD)
Frequency
DependentScaling
Error
Applytoallresults
otherthanDCor
MAINS
LForVLF
S,AorL 0.01%
W 0.05%
AVIONICS
AorL 0.002%
SorW None
<10kHz
S,AorL F*0.003%
W
 F*0.0015%
10k‐40kHz
S,AorL 0.03%+(F‐10)*0.007%
W
 F*0.0015%
40k‐100kHz
S,AorL 0.24%+(F‐40)*0.02%
W
 0.06%+(F‐40)*0.003% 0.06%+(F‐40)*0.004%
100k‐1MHz
S,AorL Typically(F/1250)
2
*100%
W
 0.24%+(F‐100)*0.012% 0.3%+(F‐100)*0.015%
>1MHz
W
 Typically(F/5000)
2
*100% Typically(F/3000)
2
*100%
Self‐HeatingScalingError
Applytoallresults(only
significantathighercurrents)
3minutenominaltimeconstant
All 0.00015%*A
AC+DC
2
0.0002%*A
AC+DC
2
None
TemperatureScalingError
Applytoallresultsifoutsideof
±5Cfromcalibrationtemperature
All 0.005%perCoutsideof±5Cfromcalibrationtemperature
BandwidthLimitScalin
g
Error
ApplyifusingUSERbandwidth
setting
All 10%*(F/F
BW
)
2
,unspecifiedabove0.3*F
BW

MAXIMUMFLOORERRORS
ApplytoallresultsasshownbelowinAmps(generallyonlysignificantatlowinputlevels)
Specification
Channel
Type
OptionH OptionDHIRange OptionDLORange OptionXHIRange OptionXLORange
BaseFloorError
Applytoallresults
AorL 56µA 38µA 250nA 6µV 150nV
Sor
W
 225µA 150µA 1µA 23µV 600n
V
DCFloorError
ApplytoDCandRECTIFIED
results
ApplytoAC+DCresultsafter
multiplyingbyA
DC
/A
AC+DC

AorL 0.23mA 0.15mA 1µA 40µV 5µV
S 0.45mA 0.3mA 2µA 80µ
V
6µV
W 0.68mA 0.45mA 3µA 120µV 8µV
ACFloorError
ApplytoAC,
AC+DC,and
RECTIFIED
results
MAINS,LF,VLF&
F
BW
≤10kHz
S,AorL 3.3µA/A
RDG
1.5µA/A
RDG
90pA/A
RDG
35nV/A
RDG
 20pV/A
RDG
W
5µA/A
RDG
2.5µA/A
RDG
125pA/A
RDG
50nV/A
RDG
 50pV/A
RDG
AVIONICS&
F
BW
≤50kHz
S,AorL 33µA/A
RDG
15µA/A
RDG
0.9nA/A
RDG
350n
V
/A
RDG
 200p
V
/A
RDG
W
50µA/A
RDG
25µA/A
RDG
1.25nA/A
RDG
500n
V
/A
RDG
 500p
V
/A
RDG
Otherwise
S,AorL 330µA/A
RDG
150µA/A
RDG
9nA/A
RDG
3.5µV/A
RDG
 2nV/A
RDG
W
500µA/A
RDG
250µA/A
RDG
12.5nA/A
RDG
5µV/A
RDG
 5nV/A
RDG
PeakFloor
Error
ApplytoPK,
VLYandPK‐
VLYresults
MAINS,LF,VLF&
F
BW
≤10kHz
S,AorL 8mA 5mA 40
µ
A 0.75mV 25
µ
V
W 10mA 6.5mA 50µA 0.9mV 30µV
AVIONICS&
F
BW
≤50kHz
S,AorL 25mA 17mA 125
µ
A2.5mV65
µ
V
W 30mA 20mA 150µA 3mV 80µV
Otherwise
S,AorL 75mA 50mA 400µA 7.5mV 200µV
W 90mA 60mA 500µA 10mV 250µV
CommonModeError
Applytoallresults
ApplyusingvoltageonALO
terminalrelativetochassis
ground.Errorhas90°phaseshift
tocommon‐modevoltage
All
500pAperV.Hz
(5.75µA@230V/50Hz)
400pAperV.Hz
(4.6µA@230V/50Hz)
20pAperV.Hz
(0.23µA@230V/50Hz)
15nVperV.Hz
(0.172mV@230V/50Hz)
0.5nVperV.Hz
(5.75µV@230V/50Hz)
AdjacentChannelError
Applytoallresults
Applyusin
g
adjacentchannelALO
orVLOterminalvoltagerelative
tochassisground.Errorhas90°
phaseshifttoadjacentchannel
voltage
All
150pAperV.Hz
(1.725µA@230V/50Hz)
120pAperV.Hz
(1.38µA@230V/50Hz)
7pAperV.Hz
(80.5nA@230V/50Hz)
7nVperV.Hz
(80.5µV@230V/50Hz)
0.2nVperV.Hz
(2.3µV@230V/50Hz)

