This document is the user's guide for Agilent Technologies Agilent 34401A 6 ½ Digit Multimeter. It describes the features and characteristics of the product.
The Agilent 34401A is a digital multimeter designed for voltage, resistance, frequency (period), and diode test measurements. It features input terminals with specific protection limits to ensure safe operation against electric shock and instrument damage. The device supports IEC Measurement Category II conditions up to 300 VAC and includes overvoltage protection for transient events up to 2500 Vpk in isolated circuits.
The manual covers essential safety information, including grounding requirements, cleaning procedures, and warnings regarding the use of substitute parts or unauthorized modifications. It details the operational limits for various input terminals, such as the Main Input (HI/LO), Current Input, and Sense Terminals, ensuring users adhere to maximum voltage and current ratings.
| Resolution | 6 ½ Digit |
|---|---|
| HI to LO Protection Limit | 1000 VDC or 750 VAC |
| LO to Ground Protection Limit | 500 Vpk |
| HI Input Terminal Protection Limit (relative to ground) | 1500 Vpk |
| Current Input Protection Limit | 3A (rms) |
| Sense Terminal Protection Limit | 200 Vpk |
The mains are limited to a maximum line voltage of 300 VAC.
The Agilent 34401A is designed to safely withstand occasional transient overvoltages up to 2500 Vpk.
No, it may not be used with its HI and LO inputs connected to mains in permanently installed electrical devices such as main circuit-breaker panels.