Data Sheet

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SDM3045X Digital Multimeter
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
1Ω for 60 mA, 600 mA 1 Ω
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 the 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 1 Ω; 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
Measure Attentions Error are leaded into 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 owing the capacitance
Connection Type 2-wire
Input Protection 1000 V on all ranges
Temperature Measuring
Measurement Method Support for TC and RTD types of sensor
Trigger and Memory
Samples/Trigger 1 ~ 10000
Trigger Delay 6 ms ~ 10000 ms optional
External Trigger Input
Input Level
TTL compatible (High level when left input terminal is hanging
in the air)
Trigger Condition Rising and Falling selectable
Input Impedance ≥20 KΩ//400 pF ,DC-coupled
Min Pulse 500 us
VMC
Level TTL compatible
Output Polarity Straight and negative optional
Output Impedance 200 Ω, typical