Center 321 User Manual

CENTER TECHNOLOGY CORP.
321
S
OUND LEVEL METER
IEC 651 TYPE II
POWER-UP OPTIONS
Auto=
Hi =
Med=
Lo =
MIN
MAX
SLOW
FAST
50 100 dB
130 dB
130 dB
30
80
LEVEL
30 80 dB
C
A

Center 321 Specifications

General

Brand	Center
Model	321
Category	Measuring Instruments
Language	English

Summary

Safety Information

Environment Conditions

Specifies operating and storage environmental limits for optimal performance.

Maintenance and Cleaning

Guidelines for cleaning and upkeep to ensure instrument longevity.

Safety Symbols

Explains the meaning of safety symbols used within the manual.

General Description

Specifications

Name and Functions

Device Components and Accessories

Identifies physical parts like microphone, terminals, and accessories such as windscreen.

Display and Indicators

Details the LCD display, bargraph, and status indicators.

Control Buttons

Explains the functions of the power, MAX/MIN, level, and weighting buttons.

Calibration and Communication Interfaces

Covers the CAL potentiometer and RS-232 interface for calibration and data transfer.

Auto Power Off

Calibration Procedures

Measurement Preparation

Battery Loading and Replacement

Instructions for installing and replacing the instrument's battery.

AC Adapter Connection

Guide for connecting the external AC power adapter.

Operating Precautions

Environmental and Handling Precautions

Advice on operating in wind, temperature, humidity, and avoiding vibration.

Measurement

Measurement Steps Overview

Covers battery installation, power-on, parameter selection, and positioning.

Max/Min Hold Function

Explanation of capturing and clearing maximum and minimum noise levels.

Powering Down

Procedure for turning off the instrument and removing the battery.