THM420 Specifications
Handheld and Benchtop Instruments Basic Service
3
Table 2: Measurement Characteristics
Characteristic Description
Volts
DC Ranges 400 mV, 4 V, 40 V, 400 V, 850 V
AC Ranges 400 mV, 4 V, 40 V, 400 V, 600 V
DC Accuracy ±(0.3% of reading + 2 counts)
AC Accuracy
40 to 50 Hz ±(1.5% of reading + 5 counts)
50 to 60 Hz ±(1.0% of reading + 5 counts)
60 Hz to 1 kHz ±(1.5% of reading + 5 counts)
Input Impedance Maximum: 1 MW paralleled by 100 pF
Current
DC Ranges 400 mA, 8 A
AC Ranges 400 mA, 8 A
DC Accuracy
400 mA Range ±(0.6% of reading + 3 counts)
8 A Range ±(0.8% of reading + 4 counts)
AC Accuracy (40 to 1 kHz)
400 mA Range ±(1.8% of reading + 5 counts)
8 A Range ±(1.8% of reading + 5 counts)
Overload protection
mA Connector 500 mA (350 V) fast blow fuse
A Connector 15 A (600 V) fast blow fuse
Resistance
Ranges 400 W, 4 kW, 40 kW, 400 kW, 4 MW, 40 MW
Accuracy (By range)
400 W ±(0.4% of reading + 4 counts)
4 kW, 40 kW, 400 kW ±(0.4% of reading + 2 counts)
4 MW ±(0.6% of reading + 3 counts)
40 MW ±(1.5% of reading + 5 counts)
Frequency
Ranges 100 Hz, 1 kHz, 10 kHz, 100 kHz, 1 MHz
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