Teledyne T3DMM6-5, User Manual

Page: 6 / 121

VI
Input terminal protection limitation.
Protection limitation is defined for the input terminals:
1. Main input (HI and LO) terminal
HI and LO terminals are used for Voltage, Resistance, Capacitance,
Continuity, Frequency, Diode and Temperature measurements. Two
protection limitations are defined:
●
HI-LO protection limit: 1000VDC or 750AVC. This is the maximum
measurable voltage. The limitation can be expressed as 1000Vpk.
●
LO-ground protection limit: LO terminal can safely “float” 500Vpk
relative to ground. The maximum protection limitation of the HI terminal
relative to ground is 1000Vpk. Therefore, the sum of the “float” voltage and
the measured voltage cannot exceed 1000Vpk.
2. Sampling (HI Sense and LO Sense) terminals
HI Sense and LO Sense are used for 4-wire Resistance measurements. Two
protection limits are defined:
●
HI Sense-LO Sense protection limitation: 2000Vpk.
●
LO Sense-LO Sense protection limitation: 2Vpk.
3. Current input (I) terminal
I and LO terminals are used for current measurement. The maximum current
which go through the I terminal is limited to 10A by the fuse on the back panel.
NOTE:
Voltage on the current input terminal corresponds to voltage on LO terminal. To
keep protected, only use the fuse of specified type and value to replace
this fuse.