Conrad VC940, Руководство по эксплуатации

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Model VC940: OPERATING MANUAL
19
400mV 0.01mV ±(0.025%+8)
Around 2.5G Ω
4V 0.0001V
40V 0.001V
400V 0.01V
1000V 0.1V
±(0.05%+5)
1000V
Around 10M Ω
B. AC Voltage (AC+DC measurement is available)
Accuracy
Range Resolution
Bandwidth Accuracy
45Hz~1kHz ±(0.5%+5)
1kHz~10kHz ±(0.8%+8)
10kHz~120kHz ±(3%+8)
120kHz~250kHz ±(4%+8)
4V 0.0001V
250kHz~400kHz ±(10%+50)
45Hz~1kHz ±(0.5%+5)
1kHz~10kHz ±(1%+8)
10kHz~100kHz ±(3%+8)
40V 0.001V
100kHz~400kHz Not Specified
45Hz~1kHz ±(0.5%+5)
1kHz~10kHz ±(4%+8) 400V 0.01V
10kHz~250kHz Not Specified
45Hz~1kHz ±(1%+8)
1kHz~5kHz ±(5%+8) 750V 0.1V
5kHz~10kHz ±(10%+8)
Remarks:
z
Input Impedance: Approx 10M
Ω .
z Overload Protection: 1000V.
z
Display:
a) True rms are valid from 10% of range to 100% of range
b) AC crest factor can be up to 3.0 except 750 where it is 1.5.
c)
A residual reading of 80 digits with test leads shorted, will not affect stated accuracy.
d) When frequency is lower than 100kHz, the accuracy guarantee range 10%-100%.
e) When frequency is high than 100kHz, the accuracy gaurantee range 15%~100%
f) When making AC+DC measurment, the accuray need to add (1%+ 35 digits) of reading based on the above table.
C. DC Current
Range Resolution Accuracy
Overload Protection
400µA 0.01µA ±(0.25%+10)
4000µA 0.1µA
40mA 0.001mA
400mA 0.01mA
±(0.8%+10)
0.5A, 250V, fast type fuse,
ø5×20mm
10A 0.001A
±(1.5%+20) 10A, 250V, fast type fuse,
ø5×20mm
Remarks:
At 10A range:
z When the measured current is ≤ 5A, continuous measurement is allowed.
z When the measured current is between 5A-10A, continuous measurement ≤ 10 seconds and interval more than 15 minutes.
D. AC Current (AC+DC measurement is available)
Accuracy
Range Resolution
Bandwidth Accuracy
Overload Protection
400µA 0.01µA
4000µA 0.1µA
40mA 0.001mA
400mA 0.01mA
45Hz~1kHz
1kHz~10kHz
±(0.5%+5)
±(1%+5)
0.5A, 250V, fast type fuse,
ø5×20mm
45Hz~1kHz ±(0.8%+5)
10A 0.001A
1kHz~10kHz ±(1.5%+5)
10A, 250V, fast type fuse,
ø5×20mm
Remarks:
z
Display:
a) True rms are valid from 10% of range to 100% of range
b) AC crest factor can be up to 3.0.
c)
A residual reading of 80 digits with test leads shorted, will not affect stated accuracy.
d) When frequency is lower than 100kHz, the accuracy guarantee range 10%-100%.
e) When frequency is high than 100kHz, the accuracy gaurantee range 15%~100%
f) When making AC+DC measurment, the accuray need to add (1%+ 35 digits) of reading based on the above table.
z At 10A range:
a) When the measured current is ≤ 5A, continuous measurement is allowed.
b) When the measured current is between 5A-10A, continuous measurement ≤ 10 seconds and interval more than 15 minutes.
E. Resistance
Range Resolution Accuracy
Overload
Protection
400 Ω 0.1 Ω ±(0.8%+10)+test leads open circuit value
4k Ω 0.001k Ω
40k Ω 0.01k Ω
400k Ω 0.1k Ω
4M Ω 0.001M Ω
±(0.5%+10)
40M Ω 0.01M Ω ±(1.5%+20)
1000V
F. Continuity Test