1 Getting Started Tutorial
48 Keysight U3402A User’s and Service Guide
– 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
[a]
12.000 A
[a]
12.00 A
[a]
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
[b]
120.000 Ω, 1.20000 kΩ,
12.0000 kΩ, 120.000 kΩ,
1.20000 MΩ, 12.0000 MΩ,
120.000 MΩ
400.00 Ω, 4.0000 kΩ,
40.000 kΩ, 400.00 kΩ,
4.0000 MΩ, 40.000 MΩ,
300.00 MΩ,
400.0 Ω, 4.000 kΩ,
40.00 kΩ, 400.0 kΩ,
4.000 MΩ, 40.00 MΩ,
300.0 MΩ,
Diode test 1.20000 V 2.5000 V 2.500 V
Fixed range
Continuity
2-wire Ω/120 Ω
(continuity mode)
2-wire Ω/400 Ω
(continuity mode)
2-wire Ω/400 Ω
(continuity mode)
Notes:
[a] 10 A continuous DC or AC RMS; 12 A DC or AC RMS for 30 seconds maximum.
[b] A shielded test cable is recommended when measuring resistance more than 120 kΩ to eliminate noise interference that might be induced
to the test leads.