Unitek MICROPULL IV MP4/115, Operation And Maintenance Manual

Page: 18 / 88

CHAPTER 1: SYSTEM DESCRIPTION
MICROPULL
®
IV WIRE BOND PULL TESTER
1-10 990-180
Controls and Indicators
The operator controls and indicators are shown in figures 1-6 (front view) and 1-7 (rear view), and
described below.
Electronic Control Unit
POWER Switch (figure 1-6) – The POWER switch controls both sides of the incoming power line.
Control Lever
– This control changes the vertical position of the hook. A closed-loop servo system
insures that the movement of the hook accurately tracks the movement of the Control Lever.
PEAK FORCE Display
– This is a 3½-digit, 0.3-inch-high, light emitting diode (LED) display. The
rear panel UNITS switch (see below) selects the unit of measurement as grams- force or millinewtons
for the 10 and 100gf beams and grams-force or newtons for the 1000gf beam. The selected unit of
measurement is displayed to the right of the reading.
Measuring Rate
– In the Non-Destruct Mode, the measurement rate is 100 microseconds per bit, or
approximately 100 milliseconds for a full scale input. In the Destruct Mode, the measurement rate is
120 milliseconds per bit.
Figure 1-6. MP4, Controls and Indicators