Keysight Truevolt Serie Mode D'emploi page 17

Safety and Regulatory Information
Input Terminal Measurement Limits
Measurement Limits are defined for the input terminals:
Main Input (HI and LO) Terminals. The HI and LO input terminals are used for voltage, resistance, fre-
quency (period), capacitance, and diode test measurements. Two Measurement Limits are defined for
these terminals:
HI to LO Measurement Limit. The Measurement Limit from HI to LO (Input terminals) is 1000 VDC or
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750 VAC, which is also the maximum voltage measurement. This limit can also be expressed as 1000
Vpk maximum.
LO to Ground Measurement Limit. The LO input terminal can safely "float" a maximum of 500 Vpk rel-
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ative to ground, where ground is defined as the Protective Earth Conductor in the AC mains power
cord connected to the instrument.
As implied by the above limits, the Measurement Limit for the HI input terminal is a maximum of 1500 Vpk
relative to ground when LO is at its maximum of 500 Vpk relative to ground.
Current Input Terminal. The current input ("I") terminal has a Measurement Limit of 3 A or 10 A (DC or AC)
between the "I" terminal (3 A or 10 A) and the LO input terminal. Note that the current input terminals will
always be at approximately the same voltage as the LO terminal, unless a current protection fuse is open.
The 10 A terminal is not available on the 34460A.
Sense Terminal Measurement Limits
The HI and LO sense terminals are used for DCV ratio measurements and four-wire resistance and tem-
perature measurements. The Measurement Limit is 200 Vpk for all of the terminal pairings: LO sense to
LO input, HI sense to LO input, and HI sense to LO sense.
The 200 Vpk limit on the sense terminals is the Measurement Limit. Operational voltages in resistance meas-
urements are much lower – up to ± 12 V in normal operation.
18 Keysight Truevolt Series Operating and Service Guide