Data Sheet

7
MEASURING METHOD AND OTHER CHARACTERISTICS
DC Voltage
Input Resistance 200mVand2VRange 10MΩor>10GΩselectable
20V,200Vand1000VRange 10MΩ±2 %
Input Bias Current <90pA,25°C
Input Protection 1000 V on all ranges
CMRR 120dB(Forthe1KΩunbalancedresistanceinLOlead,max±500VDC)
NMRR 60dBat“slow”measurementrate
20dBisaddedifthe“AC”lterisopen(disconnected).
Resistance
Testing Method 4-wire resistance or 2-wire resistance selectable
Input Protection 1000 V on all ranges
DC Current
Shunt Resistor
200μAsamplingvoltage<8mV
2 mA sampling voltage < 8 mV
1Ωfor20mAand200mA
0.01Ωfor2A,10A
Input Protection
Rear panel : accessible 10 A, 250 V fast-melt fuse
Internal: 12 A, 250 V slow-melt fuse
Continuity/Diode Test
Measurement Method 1mA±5 %constant-currentsourceoropen-circuitvoltage
Beeper yes
Continuity Threshold Adjustable
Input Protection 1000 V
True-RMS AC Voltage
Measurement Method AC Coupled true RMS measure – up to 1000 V DC bias are permitted on every range.
Wave Crest Factor ≤3atfullscale
Input Impedance 1MΩ±2 %inparallelwith<100pFonallranges
AC Filter Bandwidth 20 Hz ~ 100 KHz
CMRR 60dB(Forthe1KΩimbalanceresistanceamongLoleadand<60Hz,Max±500VDC)
True-RMS AC Current
Measurement Method DC Coupled to the fuse and shunt; AC Coupled: True-RMS measurement
(measures the AC components only)
Wave Crest Factor ≤3atfullscale
Max Input <10 A (include DC component)
Shunt Resistor 1Ωfor20mA,200mA,0.01Ωfor2A,10A
Input Protection Rear panel: accessible 10 A, 250 V fast-melt fuse
Internal: 12 A, 250 V slow-melt fuse
Frequency/Period
Measurement Method Reciprocal-counting technique, AC Coupled input, AC voltage or AC current measurement
function
Additional Errors Percentage Error increases in all frequency counters when measuring low voltage or low
frequency signal.
Capacitance Measuring
Measurement Method Measure the rate of change of voltage generated during the current flow to the capacitor
Connection Type 2-wire
Input Protection 1000 V on all ranges