B&K 2250 Light Manual do Utilizador descarregar pdf (Página 27)

CHAPTER 2

Assembling your Analyzer

Mounting the Measurement Microphone

Before mounting the measurement microphone, note the following precautions:

• When screwing the microphone on, do it gently

to avoid damaging threads

• Keep dust and foreign matter off the microphone diaphragm. Do not touch

the diaphragm

with anything – it is very delicate

Note: Once the measurement microphone and preamplifier have been assembled and

connected to your analyzer, they should normally be left connected to the analyzer.

To Connect:

1) Gently screw the microphone onto Preamplifier ZC-0032, see items 1 and 2 in Fig.2.1.

2) Insert the male plug of the preamplifier into the top socket of the analyzer (see item 17 in

Fig.2.1) and push gently until it snaps into position.

To Disconnect:

3) To disconnect the preamplifier and microphone from the analyzer, grip the locking collar

firmly and slide back to remove the preamplifier and microphone combination.

Mounting the Windscreen

For short outdoor noise measurements (or indoor measurements exposed to air movement)

mount Windscreen UA-1650 onto the microphone and preamplifier combination, making sure

it ‘snaps’ into place over the windscreen sensor. The sensor is built into the preamplifier, see

item 2 in Fig.2.1. Icons in the status field on the screen indicate whether the windscreen is

detected or not. For longer-term outdoor measurements, see Mounting the Outdoor Microphone

Kit below.

Mounting the Analyzer onto the Tripod Extension Stem and Tripod

Mount the analyzer onto the Tripod Extension Stem UA-1651 and Small Tripod UA-0801, as

follows:

1) Screw Tripod Extension Stem UA-1651 onto the threaded stud of the ball-joint on Small

Tripod UA-0801. Secure the ball-joint roughly in a vertical position (that is, in-line with

the tripod) until ready to follow the instruction in step 4.

2) Screw the Extension Stem UA-1651 into the analyzer, using the threaded socket at the

lower back of the analyzer (see item 18 in Fig.2.1).

3) Set Small Tripod UA-0801 (including the analyzer) in the required position, and adjust it

to the required height. Ensure that one of the three legs is pointing roughly in the same

direction as your analyzer needs to point. (We will refer to this leg as the front leg.)

4) Position the extension stem at an angle of 45



to the horizontal and vertically in-line with

the front leg of the tripod – this is to ensure the whole setup is stable.

Note: The procedure is the same if Tripod UA-0587 is used instead of Small Tripod UA-0801.

Once you have carried out these instructions, you are ready to start measuring, see Chapter 3.

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B&K 2250 Light Manual do Utilizador Página 27