User`s guide

2 Operation and Features
Measuring Low-Resistance
44 U3606B User’s Guide
Low-resistance measurement summary
CAUTION
Disconnect circuit power and discharge all high-voltage capacitors
before measuring resistance or conductance, or testing circuit
continuity, to avoid damaging the U3606B or the device under test.
NOTE
DC power supply functions are locked
The DC power supply functions are locked when you select the
low-resistance (Lo Ω) measurements. You cannot use the DC power
supply module simultaneously with the digital multimeter module when
you are measuring 4-wire low-resistance measurements.
To unlock the DC power supply functions, exit the low-resistance (Lo Ω)
measurement by selecting another multimeter measurement.
NOTE
Delayed response for low-resistance readings
For measuring low-resistance, a delayed response should be expected
from the front panel display. For remote interface operation, increase the
SCPI query time-out value (typically 15000 ms).
Table 2 - 5 Low-resistance measurement summary
Item Description
Available ranges 100 mΩ, 1000 mΩ, 10 Ω, 100 Ω, 1000 Ω
Measurement
method
Four-wire, the test current is sent from the FORCE
terminals and the resistance is measured by the SENSE
terminals.
Input protection
• FORCE terminals: Protected with a 3.15 A/250 V FF fuse
• SENSE terminals: 1000 V
rms
on all ranges, < 0.3 A short
circuit
U3606-90054_UG_EN.book Page 44 Friday, July 11, 2014 5:12 PM