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Center 221 User Manual

Center 221
12 pages
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300V CAT III
COM
600V
0 - 200
0 - 600 V
0 - 600 A
600V CAT II
OFF
V
A
V
A
300V CAT III
600V CAT II
HOLD
600A
MINI CLAMP METER
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Center 221 Specifications

General IconGeneral
TypeSound Level Meter
Accuracy±1.4 dB
Resolution0.1dB
Microphone1/2 inch Electret Condenser microphone
DisplayLCD
Measuring Range30 dB to 130 dB
Frequency Range31.5 Hz to 8 kHz
Frequency WeightingA, C
Time WeightingFast, Slow
Operating Temperature0°C to 40°C

Summary

Safety Information and Precautions

Environmental Operating Conditions

Specifies altitude, operating and storage temperature, and humidity limits for the device.

Explanation of Safety Symbols

Defines symbols used in the manual for attention, dangerous voltage, and double insulation.

Technical Specifications

General Product Specifications

Details digital display, overload indication, sample rate, power source, dimensions, and accessories.

Electrical Measurement Specifications

Outlines accuracy, ranges, and overload protection for ACA, ACV, and resistance measurements.

Instrument Overview

Display Symbol Identification

Explains display icons like Low Battery, Data Hold, Continuity, Voltage, Amperage, and Ohm indicators.

Measurement Procedures

AC Current (ACA) Measurement

Procedure for measuring AC current using the clamp meter, including safety notes.

AC Voltage (ACV) Measurement

Instructions for measuring AC voltage using test leads and the appropriate selector.

Resistance Measurement

Guidelines for measuring resistance, emphasizing power disconnection and capacitor discharge.

Continuity Testing

How to perform continuity tests, noting the beeper indication for low resistance.

Battery Changing

Instrument Maintenance

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