MX 20
39
3.4.5 - DC CURRENT MEASUREMENT
3.4.5 - DC CURRENT MEASUREMENT
3.4.5 - DC CURRENT MEASUREMENT
3.4.5 - DC CURRENT MEASUREMENT
3.4.5 - DC CURRENT MEASUREMENT
· When used as an ammeter, the MX 20 is alawais in manual
ranging mode.
· Connect the black lead to the COM terminal and the red lead to
the mA terminal for measuring currents less than 200mA or to the
A terminal for measuring currents up to 10A.
· It is best to begin by selecting the highest possible range (10A)
when the order of magnitude of the current to be measured is
unknown. In this case set the rotary switch to the corresponding
A position and select the A input terminal.
· If necessary, press the AC/DC key to display the DC symbol.
· Do not connect the multimeter in series with the circuit to be
measured until the last possible moment. Then switch on the circuit
to be measured.
· If the range chosen is too high, first switch off the circuit to be
measured, then change the setting of the rotary switch and the
position of the red lead and switch on the circuit again.
· Do not under any circumstances change the range or disconnect
the leads while measuring. This may give rise to switching current
spikes and overvoltages which can damage the multimeter or blow
the fuses unnecessarily.
· To minimise overheating and to prevent thermal drift, measure-
ments in the high current range (10A) should be limited to a few tens
of seconds.
3.4.6 - AC CURRENT MEASUREMENT
3.4.6 - AC CURRENT MEASUREMENT
3.4.6 - AC CURRENT MEASUREMENT
3.4.6 - AC CURRENT MEASUREMENT
3.4.6 - AC CURRENT MEASUREMENT
· Ranges are selected in the same manner as for DC current
measurement (manual mode).
· Connect the black lead to the COM terminal and the red lead to
the mA terminal to measure currents less than 200mA, or to the A
terminal to measure currents up to 10A.
