Data Sheet

7
MEASURING METHOD AND OTHER CHARACTERISTICS
DC Voltage
Input Resistance 600 mV 10 MΩ or 10 GΩ selectable
6 V, 60 V, 600 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
Resistance
Testing Method 4-wire resistance or 2-wire resistance selectable
Input Protection 1000 V on all ranges
DC Current
Shunt Resistor
600 μA sampling voltage < 33 mV
6 mA sampling voltage < 0.33 V
1 Ω for 60 mA, 1 Ω for 600 mA
0.01 Ω for 6 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 60 mA, 600 mA; 0.01 Ω for 6 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 flowing in the capacitor
Connection Type 2-wire
Input Protection 1000 V on all ranges