Safety Notices on the Product:
• DANGER
It calls attention to an operation, if not correctly performed, could result in injury
or hazard immediately.
• WARNING
It calls attention to an operation, if not correctly performed, could result in
potential injury or hazard.
• CAUTION
It calls attention to an operation, if not correctly performed, could result in
damage to the product or other devices connected to the product.
Safety Symbols on the Product:
Hazardous
Voltage
Safety Warning Protective Earth
Terminal
Chassis Ground Test Ground
1.3 Input Terminal Protection Limits
Protection Limits are defined for the input terminals:
Main Input (HI and LO) Terminals
The HI and LO input terminals are used for voltage, resistance, capacitance, continuity,
frequency (period), and diode test measurements. The following two Protection Limits
are defined for these terminals:
1. HI to LO Protection Limit: 1000 VDC or 750 VAC, which is also the maximum
voltage measurement. This limit can also be expressed as 1000 Vpk maximum.
2. LO to Ground Protection Limit. The LO input terminal can safely "float" a maximum
of 500 Vpk relative to the ground.
The protection limit for HI terminal is a maximum of 1000 Vpk relative to the ground.
Therefore, the sum of the "float" voltage and the measured voltage cannot exceed
1000 Vpk.
Sense (HI Sense and LO Sense) Terminal
HI Sense and LO Sense terminals are used only for four-wire resistance
measurements. The following two Protection Limits are defined for these terminals:
1. HI Sense to LO Sense Protection Limit. HI Sense to LO Sense Protection Limit: 200
Vpk.
Safety Requirement
Copyright ©RIGOL TECHNOLOGIES CO., LTD. All rights reserved. DM858 Series User Guide
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