x Agilent U1602B/U1604B User’s and Service Guide 
Prevention of fire or injury:
• Use only the designated AC adapter and test leads supplied with the 
instrument.
• Observe all ratings and markings on the instrument before 
connecting to the instrument.
• When performing measurement, ensure that the right safety and 
performance ratings of instrument and accessories are used.
Maximum Input Voltages
• Input CH1 and CH2 direct (1:1 Probe) 
— 300 V CAT III
• Input CH1 and CH2 via 1:10 Probe 
— 600 V CAT III
• Input CH1 and CH2 via 1:100 Probe 
— 600 V CAT III
• Meter Input 
— 300 V CAT III, 600 V CAT II
• Scope Input — 300 V CAT III
• Voltage ratings are Vrms (50 
/60 Hz) for AC sine wave and 
VDC for DC applications.
Maximum Floating Voltage
• From any terminal to ground — 300 Vrms CAT III (up to 400 Hz)