Getting Started 1
U3402A User’s and Service Guide 31
• Autorange thresholds — The multimeter shifts ranges as follows:
• Down range at < 5% of current range
• Up range at > full scale of current range
• Table 1- 4 shows the summary of range values for slow, medium, and fast
reading rate respectively.
Autoranging is not applicable for current measurement up to 12 A. You are required to
select the range manually when a signal is applied to the A terminal.
Table 1 - 4 Range scale value in slow, medium, and fast reading rate
Measurement
function
Range
Autoranging
Slow reading rate Medium reading rate Fast reading rate
DCV
120.000 mV, 1.20000 V,
12.0000 V, 120.000 V,
1000.00 V
400.00 mV, 4.0000 V,
40.000 V, 400.00 V,
1000.0 V
400.0 mV, 4.000 V,
40.00 V, 400.0 V, 1000 V
ACV, DCV + ACV
120.000 mV, 1.20000 V,
12.0000 V, 120.000 V,
750.00 V
400.00 mV, 4.0000 V,
40.000 V, 400.00 V,
750.0 V
400.0 mV, 4.000 V,
40.00 V, 400.0 V, 750 V
DCI, ACI, DCI + ACI
12.0000 mA, 120.000 mA,
1200.00 mA
40.000 mA, 120.00 mA,
1200.0 mA
40.00 mA, 120.0 mA,
1200 mA
DCI, ACI, DCI + ACI
12.0000 A
[1]
12.000 A
[1]
12.00 A
[1]
Manual only
Frequency
1200.00 Hz, 12.0000 kHz,
120.000 kHz, 1.00000 MHz
1200.0 Hz, 12.000 kHz,
120.00 kHz, 1.0000 MHz
1200 Hz, 12.00 kHz,
120.0 kHz, 1.000 MHz
Resistance
[2]
120.000 W, 1.20000 kW,
12.0000 kW, 120.000 kW,
1.20000 MW, 12.0000 MW,
120.000 MW
400.00 W, 4.0000 kW,
40.000 kW, 400.00 kW,
4.0000 MW, 40.000 MW,
300.00 MW,
400.0 W, 4.000 kW,
40.00 kW, 400.0 kW,
4.000 MW, 40.00 MW,
300.0 MW,
Diode test
1.20000 V 2.5000 V 2.500 V
Fixed range
Continuity
2-wire W/120 W
(continuity mode)
2-wire W/400 W
(continuity mode)
2-wire W/400 W
(continuity mode)
Notes
:
1 10 A continuous DC or AC RMS; 12 A DC or AC RMS for 30 seconds maximum.
2 A shielded test cable is recommended when measuring resistance more than 120 kW to eliminate noise interference that
might be induced to the test leads.
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