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Protecting the E4991B

To protect your E4991B, follow the instructions below:

Read the warning labels and specifications

Do not exceed the values provided in the specifications guide or as indicated by the yellow warning labels on the front panel of the E4991B. Refer to the specifications for the conditions required to meet the listed specifications. There will be information regarding E4991B  settings, and calibration requirements.

DO NOT press keys on the front panel, rotate RPG knob, or connect USB device during boot up

During boot up of window or of the Impedance Analyzer application program, do NOT press keys on the front panel, rotate RPG knob, or connect USB device. Doing so MAY lead to a front panel lockup state. To clear this state, shutdown and restart the E4991B.

Do NOT Plug off Power Cable during Shutdown Process

Do Not Plug off Power cable until completing the shutdown process.

If you directly interrupt the power supply to the power cable receptacle when the power supply is on, or while turning off the Line Switch (Always ON), the shutdown process will not work. This could damage the SSD of the E4991B.

Do NOT Modify or Reconfigure the Operating System

The Microsoft Windows operating system has been modified and optimized by Keysight to improve the performance of the E4991B.

Install Antivirus Protection

The E4991B does NOT have antivirus protection when shipped. Use of an antivirus program is strongly recommended if you connect the E4991B to the LAN (Internet).

In addition, the use of a firewall could help to protect the E4991B from viruses. However, some firewalls could limit DCOM connectivity of the E4991B.

Install Windows Critical Updates

The E4991B is always shipped with the latest service packs and critical updates that were available at the time when firmware is updated. Keysight recommends you to maintain the latest available protection for your E4991B by automatically accepting and installing the latest critical security patches from the Microsoft Windows Update website: http://windowsupdate.microsoft.com

Precaution for Use of Storage

Do NOT modify or delete any Files and Folders in the drives other than D drive. Doing so will result in malfunctioning of the device. It is required to execute the System recovery if there is any trouble with the above operations.

Precaution for input connector and cable

Precautions for Electrostatic Discharge (ESD)

ESD can damage or destroy electronic components. Whenever possible, conduct testing at a static-safe workstation. Keep static-generating materials at least one meter away from all components. Before connecting any coaxial cable to an analyzer, momentarily short the center and outer conductors of the cable together.

Maintain working environment condition

Control your environment. Maintain temperature & humidity with a satisfactory range within the instruments specification and prevent large fluctuations.

Precautions for transportation

Check for Proper Ventilation

Periodically check and clean the cooling vents of the E4991B. Inadequate airflow can result in excessive operating temperatures  which can lead to instrument failures. When installing the product in a cabinet, the convection in and out of the instrument must not be restricted.

See the installation guide for details.

Precautions for Proper Grounding