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DS484Q/DS486Q | Installation Instructions | 4.0 Setup and Alignment

Bosch Security Systems, Inc. | 7/05 | 4998138530F 13

4.2 Alignment

4.2.1 Description

Precise, correct alignment is critical for

these systems to operate effectively.

The first procedure (Section 4.2.2 Scope

Alignment on page 14) is a visual alignment

and is not precise. Use one of the

additional procedures to complete the

alignment.

Aligning a paired transmitter and receiver requires a

coarse, or visual, alignment followed by a fine

alignment.

Coarse Alignment

In the coarse alignment, if the installed devices do not

face each other directly, the upper optical module and

the lower optical module on each device are manually

turned toward the opposite device. Then the opposite

device is viewed through the scopes on the upper and

lower optical modules while the horizontal and vertical

angles are adjusted, using the turntable and the

adjustment screws. Refer to Section 4.2.2 Scope Alignment

on page 14.

Fine Alignment

The detectors have three possible fine alignment

methods: Voltmeter, Level LED, and Sound.

Alignment interruption sheets (Figure 19) are used in all

three procedures to cover all optical modules in the

installation except the pair that are being aligned.

Select a procedure based on the conditions and

considerations of the specific installation. Refer to

Table 9.

Figure 19: Alignment Interruption Sheet

Table 9: Fine Alignment Considerations

Alignment Procedure Considerations

Voltmeter

(Refer to Section

4.2.3 Voltmeter

Alignment on

page 15.)

• Requires a voltmeter and a

screwdriver

• Works well at any distance

between the transmitter and

receiver

• Requires repeated

observation of the voltmeter at

the receiver

• Most accurate

• Might require two people

Level LED

(Refer to Section

4.2.4 Level LED

Alignment on

page 15.)

• Requires only a screwdriver

• More difficult to do when the

transmitter and receiver are

installed far apart

• Requires repeated visual

observation of the level meter

on the receiver

• Might require two people

Sound

(Refer to Section 4.2.5

Sound Alignment on

page 15.)

• Requires only a screwdriver

• Works well at any distance

between the transmitter and

receiver

• Does not require visual

observation of the opposite

device

• Difficult to do in a noisy

environment

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