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NARDA ELT-400 User Manual

NARDA ELT-400
100 pages
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ELT-400
Exposure Level Tester
Operating Manual
BN 2300/98.11
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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Table of Contents

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NARDA ELT-400 Specifications

General IconGeneral
Dynamic Range80 dB
DisplayLCD
Isotropic ProbeYes
Data LoggingYes
InterfaceUSB
Weight1.2 kg
Power SupplyRechargeable battery
Frequency Range1 Hz to 400 kHz

Summary

Introduction to the ELT-400

About this Instrument

Provides an overview of the ELT-400, its applications, and manual conventions.

Application Areas

Details the suitability of the ELT-400 for production areas, everyday environments, and EMC labs.

About this Manual

Explains typographical conventions and symbols used in the manual for clarity.

Safety Instructions

Pre-Connection Safety Precautions

Instructions to ensure the instrument's condition and safe operation before initial use.

Correct Usage and Hazard Warnings

Covers safe operation, strong field risks, frequency limits, electrical hazards, malfunctions, and explosion risks.

AC Adapter/Charger Unit Safety

Safety guidelines for the AC adapter/charger unit, including electric shock and destruction risks.

Faults and Stress Handling

Procedures for handling instruments with damage or subjected to excessive stress.

Preparation for Use

Unpacking and Initial Checks

Guides on unpacking, checking contents, handling transport damage, and recovery after storage.

Power Supply and Battery Operations

Details on using rechargeable and alkaline batteries, including handling and charging procedures.

Preparing for Field Measurements

Steps for setting up the instrument and connecting the B field probe for measurements.

Control and Display Elements

Keypad Functions

Overview of the instrument's keypad and the functions of each button.

LCD Display Overview

Explains the various elements displayed on the LCD screen and their meanings.

Display Backlight Control

Instructions on how to switch the display backlight on and off.

External Connectors

Description of the instrument's external connector sockets and their functions.

Operation and Use

Operating Modes Description

Overview of Exposure STD and Field Strength modes for measurements.

Performing Measurements

Guides on powering the instrument, selecting modes, setting parameters, and interpreting results.

Selecting Operating Mode and Parameters

Details on selecting operating mode, detection mode, frequency range, and measurement range.

MAX HOLD Function and Result Interpretation

Explains MAX HOLD function, interpreting results, and troubleshooting overload displays.

Active Probe Analog Output

Details on using the analog output for advanced analysis with oscilloscopes or FFT analyzers.

Maintenance and Repairs

Battery Management

Covers battery replacement, handling, and proper disposal procedures.

Instrument Cleaning and AC Adapter Unit

Instructions for cleaning the instrument and information on the AC adapter/charger unit.

Remote Control Operations

Setting Up Data Link and Interface

Guides on connecting the instrument to a PC via data link and interface parameters.

Remote Control Command Fundamentals

Covers command overview, format conventions, and response value formats.

Specific Remote Control Commands

Details commands for probe, mode, parameter settings, data transfer, and status queries.

Data Transfer and Status Commands

Includes commands for data transfer, battery status, overload status, and instrument identification.

Keypad Lock and Default Settings

Covers commands for locking the keypad and setting default instrument values.

Error Status Query

Command for querying the error status resulting from the last command.

Specifications

Functional Principle

Explains the core principle of magnetic flux density measurement using coils and DSP.

Field Strength Mode Specifications

Details frequency range, measurement range, damage level, and value collection for Field Strength mode.

Measurement Uncertainty and Result Display

Covers measurement uncertainty, influencing factors, and result display specifications.

Exposure STD Mode Specifications

Details frequency range, measurement range, and dynamic range for Exposure STD mode.

General Specifications

Includes display type, refresh rate, and remote control interface specifications.

Probe and Power Supply Specifications

Details analog output, probe characteristics, and power supply specifications.

AC Adapter, Calibration, and Labeling

Specs for AC adapter, calibration interval, and conformance labeling.

Environmental and Physical Specs

Covers climatic conditions, dimensions, and weight.

Ordering and Package Information

Information on ordering modes, order numbers, and package contents.

Optional Accessories

Lists optional accessories available for the ELT-400.

Annex A: Default Values

Parameter Default Settings

Lists the default values (ex-works settings) for various instrument parameters.

Parameter Status After Actions

Shows how parameter statuses change after specific actions or remote control commands.

Annex B: Exposure STD Mode

Technical Background

Explains the basis of field exposure measurement and the role of standards.

Exposure Calculation Derivation

Details how exposure is calculated based on reference values and standards.

Limit Value Curve Dependencies

Explains frequency and field strength dependencies affecting limit values.

Method Advantages and Notes

Highlights advantages of the Exposure STD method and comparison notes.

Annex C: Instrument Function

Functional Principle

Explains the core principle of voltage evaluation for magnetic flux density measurement.

Block Circuit Diagram

Illustrates the internal block circuit diagram of the instrument.

Transfer Function Details

Defines the intended frequency response and differences between operating modes.

Detection Mode/Detector Details

Explains simultaneous RMS and peak value measurement and calculation methods.

Peak Value and Standard Mode

Details peak value calculation and explains results in Stnd (Standard) mode.

Band Limits Graphs

Shows graphs illustrating signal attenuation at upper and lower frequency limits.

Settling Time Explanation

Explains how the instrument handles field variations and display updates.

Overload Monitoring

Describes how overload indicators are displayed and managed.

Annex D: Probe Configuration and Signal Output

Probe Coil Configuration

Information on the internal probe coil arrangement and spatial axis matching.

Probe Positioning

Detailed instructions on how to correctly position the probe for accurate measurements.

Connecting Cable Details

Details the connections for the analog interface cable using Koax and DB9 plugs.

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