BRUEL & KJAER 2225 User Manual

3. OPERATION
3.1. INTRODUCTION
This Instruction Manual describes the specific procedures necessary to use the Integrat-
ing Sound Level Meter Type 2225 and Integrating Impulse Sound Level Meter Type
2226 correctly. However, many other more general aspects of sound measurement
must be considered in order to be sure of obtaining accurate, reproducible measure-
ments. Many of these are discussed in the accompanying booklet "Measuring Sound"
which should be read in conjunction with this Instruction Manual.
In addition, for many purposes measurements may have to be made in a way and with
equipment which are closely specified by National or International standards, e.g. air-
craft noise or industrial hearing damage risk measurements. Failure to comply with
these standards may result in invalid data. It is therefore recommended that reference
be made to the standards applicable to the particular measurement situation.
3.1.1. General Considerations
1. Store the instrument in a dry warm place.
2. Remove batteries if stored for a long time.
3. Connect microphones or adaptors with power off.
4. Use light finger torque only when fitting the microphone to the adaptor.
5. Keep dust and foreign objects away from the microphone diaphragm.
3.2. BATTERY INSTALLATION
8
The Types 2225 and 2226 are powered by three 1,5 V alkaline cells, IEC Type LR6
(B & K QB 0013). These are inserted into the rear of the instrument as shown in Fig.3 .1
after making sure the instrument is "Off" and sliding off the battery compartment cover.
Bruel & Kjaer ~ Type 2225
Fig. 3. 1. Battery replacement

BRUEL & KJAER 2225 Specifications

General

Brand	BRUEL & KJAER
Model	2225
Category	Measuring Instruments
Language	English