B+K precision TL89S1 Instruction Manual

Data Sheet and User Guide

SMD Test Fixture

TL89S1

Technical data subject to change

Speciﬁcation TL89S1

Frequency DC to 10 MHz

DC Bias ±40 V peak max (AC+DC)

Operating Temperature 0 ºC to 40 ºC

Terminal Connection BNC, 4 terminal-pair

Dimensions (W x H x D) 5.125 x 2.37 x 3.31 inches (130 x 60.3 x 84 mm)

Weight: 0.67 lbs (0.305 kg)

Test ﬁxture for measuring small surface-mount devices (SMD)

The TL89S1 ﬁxture is designed to probe SMD components with repeatable and accurate impedance measurements. The contactors are easily adjusted to

accommodate different sized components while applying the appropriate contact pressure. This test ﬁxture is attached directly to the front panel of LCR models

889B, 891, 894, and 895.

7.0 mm

0.77 mm

side view

Component insertion site

Component sizes

Rectangular type

Cylindrical type

Electrode

8.1 mm

3.0 mm

9.5 mm

Component insertion site (closeup)

0.2 mm ~ 8.1 mm

HIGHLOW

Contactor pin

Note: All mechanical measurements are typical

SMD Test Fixture

TL89S1

2www.bkprecision.com

Adjusting the contactor pins

Loosen the lock screw (1) by turning the screw

counter clockwise 2 full turns.

Press the High contactor (2) to start the

extraction, grip the Contactor rod (4) on the

opposite side and pull the contactor open to

create a gap large enough to loosely ﬁt the new

component. If more space is required, push the

Insertion lever (6) to the left until the component

ﬁts into the Component insertion site (5).

II III

Gently press in on contactor rod (4) until the new

component is centered in component insertion

site (5).

Continue to apply pressure to the contactor rod

(4) while tightening the lock screw by turning it

clockwise. Do not over tighten the lock screw.

This completes the adjustment process and

components of the same size can now be easily

changed.

Press the Insertion lever (6) to retract the Low

contactor pin. While holding the lever open,

remove the previous component and place the

next component in the insertion site (5). Slowly

release the lever to contact the new component

and begin the next measurement.

Note: The contactor pins should be cleaned

periodically to remove contamination.

v082917

1. Lock screw

2. High contactor pin

3. Low contactor pin

4. Contactor rod

5. Component insertion site

6. Insertion lever

HIGH

LOW

HIGH

Counter clockwise

(loosen)

clockwise (tighten)

Test ﬁxture illustration

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